U.S. patent application number 12/741641 was filed with the patent office on 2013-02-21 for peptide deformylase inhibitors.
The applicant listed for this patent is Kelly M. Aubart, Andrew B. Benowitz, Siegfried Benjamin Christensen, IV, Jason Christopher Dreabit, Yuhong Fang, Andrew Nicholson Knox, Jinhwa Lee, Xiangmin Liao, Beth Norton, Donghui Qin. Invention is credited to Kelly M. Aubart, Andrew B. Benowitz, Siegfried Benjamin Christensen, IV, Jason Christopher Dreabit, Yuhong Fang, Andrew Nicholson Knox, Jinhwa Lee, Xiangmin Liao, Beth Norton, Donghui Qin.
Application Number | 20130045962 12/741641 |
Document ID | / |
Family ID | 40626160 |
Filed Date | 2013-02-21 |
United States Patent
Application |
20130045962 |
Kind Code |
A1 |
Qin; Donghui ; et
al. |
February 21, 2013 |
PEPTIDE DEFORMYLASE INHIBITORS
Abstract
The present invention is directed to certain
{2-(alkyl)-3-[2-(5-fluoro-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfor-
mamide derivatives. Specifically, the invention is directed to
compounds of formula (I): ##STR00001## wherein R1, R2 and R3 are
defined below and to pharmaceutically acceptable salts thereof. The
compounds of this invention are bacterial peptide deformylase
inhibitors and can be useful in the treatment of bacterial
infections.
Inventors: |
Qin; Donghui; (Collegeville,
PA) ; Norton; Beth; (Triangle Park, NC) ;
Liao; Xiangmin; (Collegeville, PA) ; Knox; Andrew
Nicholson; (Collegeville, PA) ; Lee; Jinhwa;
(Giheung-gu, KR) ; Fang; Yuhong; (Collegeville,
PA) ; Dreabit; Jason Christopher; (Collegeville,
PA) ; Christensen, IV; Siegfried Benjamin;
(Collegeville, PA) ; Benowitz; Andrew B.;
(Collegeville, PA) ; Aubart; Kelly M.;
(Collegeville, PA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Qin; Donghui
Norton; Beth
Liao; Xiangmin
Knox; Andrew Nicholson
Lee; Jinhwa
Fang; Yuhong
Dreabit; Jason Christopher
Christensen, IV; Siegfried Benjamin
Benowitz; Andrew B.
Aubart; Kelly M. |
Collegeville
Triangle Park
Collegeville
Collegeville
Giheung-gu
Collegeville
Collegeville
Collegeville
Collegeville
Collegeville |
PA
NC
PA
PA
PA
PA
PA
PA
PA |
US
US
US
US
KR
US
US
US
US
US |
|
|
Family ID: |
40626160 |
Appl. No.: |
12/741641 |
Filed: |
November 6, 2008 |
PCT Filed: |
November 6, 2008 |
PCT NO: |
PCT/US08/82575 |
371 Date: |
May 6, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60986631 |
Nov 9, 2007 |
|
|
|
Current U.S.
Class: |
514/210.2 ;
514/212.08; 514/214.02; 514/230.5; 514/235.8; 514/249; 514/252.14;
514/252.15; 514/256; 514/261.1; 514/274; 540/521; 540/524; 544/105;
544/122; 544/230; 544/254; 544/295; 544/317; 544/327; 544/328;
544/329 |
Current CPC
Class: |
C07D 405/12 20130101;
C07D 409/12 20130101; C07D 401/12 20130101; A61P 27/16 20180101;
A61P 13/00 20180101; C07D 239/42 20130101; C07D 417/12 20130101;
C07D 239/48 20130101; C07D 413/04 20130101; C07D 401/04 20130101;
A61P 31/00 20180101; C07D 401/14 20130101; C07D 417/04 20130101;
C07D 403/14 20130101; C07D 491/18 20130101; C07D 498/04 20130101;
A61P 11/02 20180101; C07D 471/04 20130101; C07D 487/04 20130101;
C07D 487/08 20130101; C07D 403/04 20130101; A61P 17/00 20180101;
A61P 11/00 20180101; A61P 31/04 20180101; A61P 9/00 20180101 |
Class at
Publication: |
514/210.2 ;
544/328; 514/256; 544/317; 514/274; 544/295; 514/252.14; 544/329;
514/249; 544/122; 514/235.8; 544/327; 544/105; 514/230.5; 540/524;
514/212.08; 544/230; 540/521; 514/214.02; 514/252.15; 544/254;
514/261.1 |
International
Class: |
C07D 403/04 20060101
C07D403/04; C07D 239/49 20060101 C07D239/49; A61K 31/505 20060101
A61K031/505; C07D 487/08 20060101 C07D487/08; C07D 413/04 20060101
C07D413/04; A61K 31/5377 20060101 A61K031/5377; C07D 417/04
20060101 C07D417/04; C07D 498/04 20060101 C07D498/04; A61K 31/5383
20060101 A61K031/5383; A61K 31/55 20060101 A61K031/55; C07D 491/056
20060101 C07D491/056; C07D 491/048 20060101 C07D491/048; C07D
401/12 20060101 C07D401/12; C07D 487/04 20060101 C07D487/04; C07D
471/04 20060101 C07D471/04; C07D 401/04 20060101 C07D401/04; C07D
413/12 20060101 C07D413/12; C07D 401/14 20060101 C07D401/14; C07D
413/14 20060101 C07D413/14; C07D 405/12 20060101 C07D405/12; C07D
491/08 20060101 C07D491/08; C07D 409/12 20060101 C07D409/12; C07D
417/12 20060101 C07D417/12; C07D 239/48 20060101 C07D239/48; C07D
417/14 20060101 C07D417/14; A61K 31/519 20060101 A61K031/519; A61P
31/04 20060101 A61P031/04; A61K 31/506 20060101 A61K031/506 |
Claims
1. A compound according to Formula (I): ##STR00304## wherein R1 is
selected from the group consisting of C2-C7 alkyl and
--(CH.sub.2).sub.n--C3-C6 cycloalkyl; R2 is selected from the group
consisting of C1-C3 alkyl; cyclopropyl; C1-C3 alkoxy; C1-C3
haloalkyl; C1-C3 sulfanyl; 5-membered heteroaryl; 5-membered
heterocycloalkyl; halo; hydroxymethyl; and --NRaRb; R3 is selected
from the group consisting of --NR4R5; halo; phenyl, optionally
substituted by one to three R6 groups; and heteroaryl, optionally
substituted by one to three R6 groups; R4 is selected from the
group consisting of H; C1-C6 alkyl, optionally substituted with one
or two R7 groups; C1-C6 alkoxy; C3-C6 cycloalkyl, optionally
substituted with one to three R6 groups; heterocycloalkyl,
optionally substituted by one to three R6 groups; heteroaryl,
optionally substituted by one to three R6 groups; and phenyl,
optionally substituted by one to three R6 groups; R5 is selected
from H; C1-C6 alkyl, optionally substituted with one or two R7
groups; C1-C6 alkoxy; C3-C6 cycloalkyl, optionally substituted with
one to three R6 groups; heterocycloalkyl, optionally substituted by
one to three R6 groups; heteroaryl, optionally substituted by one
to three R6 groups; and phenyl, optionally substituted by one to
three R6 groups; or R4 and R5 are joined together with the N-atom
to which they are attached, forming a heterocycloalkyl group
optionally substituted with one to three R6 groups; each R6 is
independently selected from the group consisting of C1-C6 alkyl,
optionally substituted with one to three R7 groups; hydroxy; C1-C3
alkoxy; --C(O)NRaRb; --C(O)Rc; --C(O)ORc; heterocycloalkyl; C3-C6
cycloalkyl optionally substituted with one --NRaRb or pyrrolidinyl;
oxo; cyano; --NRaRb; phenyl; heteroaryl; and halo; each R7 is
independently selected from the group consisting of hydroxy; C1-C3
alkoxy; halo; phenyl; cyano; --NRaRb; --C(O)NRaRb; --C(O)Rc; C3-C6
cycloalkyl, optionally substituted with one hydroxy,
heterocycloalkyl or --NRaRb group; heterocycloalkyl; and heteroaryl
optionally substituted with one methyl, NRaRb or hydroxy; each Ra
is each independently selected from the group consisting of H and
C1-C3 alkyl optionally substituted with one hydroxy, methoxy, or
dimethylamine; each Rb is independently selected from the group
consisting of H and C1-C3 alkyl; each Rc is independently selected
from the group consisting of C1-C3 alkyl optionally substituted
with one methoxy; phenyl; heterocycloalkyl; and heteroaryl; and n
is an integer from 0 to 2; or a salt thereof.
2. The compound according to claim 1, or a salt thereof, wherein R1
is --(CH.sub.2).sub.n--C3-C6 cycloalkyl and n is 1.
3. The compound according to claim 2, or a salt thereof, wherein
R1-CH.sub.2-cyclopentyl.
4. The compound according to claim 3, or a salt thereof, wherein R2
is C1-C3 alkyl; C1-C3 alkoxy; C1-C3 haloalkyl; C1-C3 sulfanyl; or
halo.
5. The compound according to claim 4, or a salt thereof, wherein R2
is methyl; ethyl; thiomethyl; thioethyl; fluoromethyl;
difluoromethyl; 1-fluoromethyl; chloro; cyclopropyl; or
methoxy.
6. The compound according to claim 1, or a salt thereof, wherein R3
is --NR4R5.
7. The compound according to claim 6, or a salt thereof, wherein R3
is --NR4R5 and R4 and R5 are joined together with the N-atom to
which they are attached forming a heterocycloalkyl group optionally
substituted with one to three R6 groups.
8. The compound according to claim 7, or a salt thereof, wherein R3
is --NR4R5 and R4 and R5 are joined together with the N-atom to
which they are attached forming azetidinyl; pyrrolidinyl;
piperazinyl; morpholinyl; 2,5-dihydro-1H-pyrrolyl;
hexahydropyrazino[2,1-c][1,4]oxazin-(1H)-yl; isoxazolidinyl;
hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl; or
2,5-diazabicyclo[2.2.1]heptyl each of which may be optionally
substituted with one to three R6 groups.
9. The compound according to claim 7, or a salt thereof, wherein R3
is --NR4R5 wherein R4 and R5 are joined together with the N-atom to
which they are attached forming 1-piperidinyl; 4-thiomorpholinyl;
1-pyrazolidinyl; tetrahydro-5H-[1,3]dioxolo[4,5-c]pyrrolyl;
tetrahydro-1H-furo[3,4-c]pyrrol-(3H)-yl;
hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl;
hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl;
hexahydropyrazino[2,1-c][1,4]oxazin-(1H)-yl;
hexahydrofuro[3,4-b]pyrazin-(2H)-yl;
octahydro-2H-pyrido[1,2-a]pyrazinyl;
octahydropyrazino[1,2-a]azepin-(1H)-yl;
octahydropyrazino[2,1-c][1,4]oxazinyl;
octahydro-1H-cyclopenta[b]pyrazinyl; octahydro-1(2H)-quinoxalinyl;
octahydro-6H-pyrrolo[3,4-b]pyridinyl; 3-azabicyclo[3.1.0]hexyl;
2,5-diazabicyclo[2.2.1]heptyl; 4,7-diazaspiro[2.5]octyl;
5-azaspiro[2.4]heptyl; or
10-oxa-4-azatricyclo[5.2.1.02,6]decyl.
10. The compound according to claim 6, or a salt thereof, wherein
R4 is cyclopropyl; cyclobutyl; cyclopentyl;
tetrahydro-2H-pyran-4-yl; 2-oxohexahydro-1H-azepinyl;
2-oxo-2,3,4,7-tetrahydro-1H-azepinyl; or C1-C6 alkyl optionally
substituted with one of the following R7 groups selected from the
group consisting of hydroxyl; methoxy; cyan; --C(O)NRaRb; --C(O)Rc;
morpholinyl; pyridinyl; 1,3-thiazolyl; 2-amino-1,3-thiazoyl;
thienyl; furanyl; phenyl; and 1-hydroxy-1H-imidazol-2-yl; and R5 is
H; C1-C3 alkyl; cyclopropyl; or piperazinyl optionally substituted
with one R6 group.
11. A compound as substantially described in any one of Examples
1-281, or a salt thereof.
12. The compound according to claim 1 which is
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
((2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazi-
nyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazinyl)-2-(-
methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[(2R)-3-(2-{2-Chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[(2R)-3-(2-{2-Chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
or
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidin-
yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide; or a salt thereof.
13. The compound according to claim 1 which is
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-
-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyform-
amide;
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3,3,4-trimethyl-1-piperazinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazi-
n-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide;
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1-
H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide; or
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-1H-furo[3,4-c]pyrrol-5(3H)-yl-
)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformam-
ide; or a salt thereof.
14. The compound according to claim 1 which is
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-3-ethyl-1-azetidinyl]-5-fluoro--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e;
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-methyl-1-pyrazolidinyl)-4-pyrimidiny-
l]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[(2R)-3-(2-{2-Chloro-6-[(2S)-2-cyano-1-pyrrolidinyl]-5-fluoro-4-pyrimidin-
yl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(3-methyl-1-azetidi-
nyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; or
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclobutylmethyl)-3-oxopropyl]hydroxyformamide;
or a salt thereof.
15. (canceled)
16. A pharmaceutical composition comprising a compound according to
claim 1, or a pharmaceutically acceptable salt thereof, and a
pharmaceutically acceptable excipent.
17. The pharmaceutical composition according to claim 16 formulated
for oral administration.
18. The pharmaceutical composition according to claim 17 formulated
as a tablet.
19. The pharmaceutical composition according to claim 17 formulated
as a liquid.
20. The pharmaceutical composition according to claim 16 formulated
for parenteral administration.
21. A method for the treatment of a bacterial infection in humans
comprising administration of an effective amount of a compound
according to claim 1, or a pharmaceutically acceptable salt
thereof, to a human in need thereof.
22. The method according to claim 21 wherein the bacterial
infection is caused by Streptococcus, Staphylococcus, Moraxella,
Haemophilus, Neisseria, Mycoplasma, Legionella, Chlamydia,
Bacteroides, Clostridium, Fusobacterium, Propionibacterium, or
Peptostreptococcus.
23. The method according to claim 21 wherein the bacterial
infection is an ear infection, sinusitis, upper respiratory tract
infection, lower respiratory tract infection, genital infection,
skin and soft tissue infection, or bacterial endocarditis.
24. The method according to claim 21 wherein the bacterial
infection is an upper respiratory tract infection.
25. The method according to claim 21 wherein the bacterial
infection is a lower respiratory tract infection.
26. The method according to claim 21 wherein the bacterial
infection is a skin and soft tissue infection.
27-199. (canceled)
200. The compound according to claim 1 which is
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide;
or
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4--
pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
or a salt thereof.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to certain
{2-(alkyl)-3-[2-(5-fluoro-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfor-
mamide compounds, compositions containing them, the use of such
compounds in the inhibition of bacterial peptide deformylase (PDF)
activity, and in the treatment of bacterial infections.
BACKGROUND OF THE INVENTION
[0002] Bacterial protein synthesis starts with
N-formyl-methionyl-tRNA (f-Met-tRNA.sub.i) and, as a consequence,
all newly synthesized polypeptides contain an N-formyl-methionine
terminus (f-Met-pp) (Scheme I). Peptide deformylase (PDF) is a
metalloenzyme that removes the N-formyl group of the polypeptides
as they emerge from the ribosome during the elongation process
[Adams, J. M. (1968) J. Mol. Biol. 33, 571-589; Livingston, D. M.
and Leder, P. (1969) Biochemistry 8, 435-443; Ball, L. A. and
Kaesberg, P. (1973) J. Mol. Biol. 79, 531-537]. Depending on the
nature of their second amino acid, polypeptides are further
processed by methionine amino peptidase (MAP) to yield the mature
protein. Deformylation plays an indispensable role in protein
maturation as MAP, an essential enzyme for bacterial growth, cannot
hydrolyze N-blocked peptides.
##STR00002##
[0003] PDF is ubiquitous in bacteria, with at least one pdf gene
present in all bacterial genomes sequenced to date.
[0004] PDF does not play a role in eukaryotic cytoplasmic protein
synthesis which does not involve N-formylation, but nuclear-encoded
PDF proteins, containing a chloroplast/mitochondria localization
signal, have been identified in parasites, plants and mammals,
including humans. PDF is essential in plant and parasite organelles
since their genomes encode for a number of proteins which require
deformylation for activity, but there is evidence to suggest that
this is not the case in animals. In fact, characterization of human
mitochondrial PDF has shown that it is much less active than its
bacterial counterpart. Furthermore, PDF inhibitors which are active
against the human PDF enzyme in vitro have no effect on the growth
of normal human cell lines [Nguyen, K. T., Hu, X., Colton, C.,
Chakrabarti, R., Zhu, M. X. and Pei, D. (2003) Biochemistry 42,
9952-9958].
[0005] Thus, PDF inhibitors represent a promising new class of
antibacterial agents with a novel mode of action covering a
broad-spectrum of pathogens.
[0006] PDF inhibitors have been described in the art. Patent
applications have been filed on hydrazine-3-oxopropyl
hydroxyformamide derivatives of the following formula, see WO
03/101442 and WO2006/055663.
##STR00003##
[0007] Thus, attempts have been made to prepare compounds that
inhibit PDF activity and a number of such compounds have been
disclosed in the art. However, there remains a continuing need for
inhibitors of PDF which can be used in the treatment of bacterial
infections.
SUMMARY OF THE INVENTION
[0008] The present invention is directed to certain
{2-(alkyl)-3-[2-(5-fluoro-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfor-
mamide derivatives, compositions containing them, the use of such
compounds in the inhibition of bacterial peptide deformylase (PDF)
activity, and in the treatment of bacterial infections.
Specifically, the invention is directed to compounds of Formula
(I):
##STR00004##
wherein R1, R2 and R3 are defined below and to pharmaceutically
acceptable salts thereof. The compounds of this invention are
bacterial peptide deformylase inhibitors and can be useful in the
treatment of bacterial infections.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 provides a FT-IR spectrum of polymorphic Form 1 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is in cm.sup.-1 and the y-axis is
absorbance.
[0010] FIG. 2 provides a FT-IR spectrum of polymorphic Form 2 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is in cm.sup.-1 and the y-axis is
absorbance.
[0011] FIG. 3 provides a FT-Raman spectrum of polymorphic Form 1 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is in cm.sup.-1 and the y-axis is
intensity.
[0012] FIG. 4 provides a FT-Raman spectrum of polymorphic Form 2 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is in cm.sup.-1 and the y-axis is
intensity.
[0013] FIG. 5 provides a FT-Raman spectrum of polymorphic Form 3 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is in cm.sup.-1 and the y-axis is
intensity.
[0014] FIG. 6 provides an X-ray powder diffraction pattern of
polymorphic Form 1 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropy-
razino[2,1-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxo-
propyl]hydroxyformamide. The x-axis is in degrees 2 theta and the
y-axis is intensity.
[0015] FIG. 7 provides an X-ray powder diffraction pattern of
polymorphic Form 2 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropy-
razino[2,1-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxo-
propyl]hydroxyformamide. The x-axis is in degrees 2 theta and the
y-axis is intensity.
[0016] FIG. 8 provides an X-ray powder diffraction pattern of
polymorphic Form 3 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropy-
razino[2,1-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxo-
propyl]hydroxyformamide. The x-axis is in degrees 2 theta and the
y-axis is intensity.
[0017] FIG. 9 provides a differential scanning calorimitry (DSC)
thermogram of polymorphic Form 1 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is temperature (.degree. C.) and the
y-axis is heat flow (Watts/gram). The thermal event at 132.degree.
C. corresponds to exothermic solid state form conversion of Form 1
to Form 3.
[0018] FIG. 10 provides a differential scanning calorimitry (DSC)
thermogram of polymorphic Form 2 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is temperature (.degree. C.) and the
y-axis is heat flow (Watts/gram).
[0019] FIG. 11 provides a differential scanning calorimitry (DSC)
thermogram of polymorphic Form 3 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is temperature (.degree. C.) and the
y-axis is heat flow (Watts/gram).
[0020] FIG. 12 provides a thermogravimetric analysis (TGA) trace of
polymorphic Form 1 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is temperature (.degree. C.) and the
y-axis is percent weight change.
[0021] FIG. 13 provides a thermogravimetric analysis (TGA) trace of
polymorphic Form 2 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is temperature (.degree. C.) and the
y-axis is percent weight change.
[0022] FIG. 14 provides a thermogravimetric analysis (TGA) trace of
polymorphic Form 3 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. The x-axis is temperature (.degree. C.) and the
y-axis is percent weight change.
DETAILED DESCRIPTION OF THE INVENTION
[0023] In describing the invention, chemical elements are
identified in accordance with the Periodic Table of the Elements.
Abbreviations and symbols utilized herein are in accordance with
the common usage of such abbreviations and symbols by those skilled
in the chemical and biological arts. Specifically, the following
abbreviations may be used in the examples and throughout the
specification:
TABLE-US-00001 g (grams); mg (milligrams); kg (kilograms); .mu.g
(micrograms); L (liters); mL (milliliters); .mu.L (microliters);
psi (pounds per square inch); M (molar); mM (millimolar); .mu.M
(micromolar); nM (nanomolar); .mu.M (picomolar); nm (nanometers);
mm (millimeters); wt (weight); N (Normal); CFU (colony forming
units); I.V. (intravenous); Hz (Hertz); MHz (megahertz); mol
(moles); mmol (millimoles); RT (room temperature); min (minutes); h
(hours); b.p. (boiling point); TLC (thin layer chromatography);
T.sub.r (retention time); RP (reverse phase); MeOH (methanol);
i-PrOH (isopropanol); TEA (triethylamine); TFA (trifluoroacetic
acid); TFAA (trifluoroacetic anhydride); THF (tetrahydrofuran);
DMSO (dimethylsulfoxide); EtOAc (ethyl acetate); DME
(1,2-dimethoxyethane); DCM (dichloromethane); DCE (dichloroethane);
DMF (N,N-dimethylformamide); DMPU (N,N'-dimethylpropyleneurea); CDI
(1,1-carbonyldiimidazole); IBCF (isobutyl chloroformate); AcOH
(acetic acid); HOAt (1-hydroxy-7-azabenzotriazole); NMM
(N-methylmorpholine); THP (tetrahydropyran); MTBE (tert-butyl
methyl ether); Pd/C (Palladium on Carbon); mCPBA
(meta-chloroperbenzoic acid; HOBT (1-hydroxybenzotriazole); FMOC
(9-fluorenylmethoxycarbonyl); EDC (1-[3-dimethylamino)
propyl]-3-ethylcarbodiimide hydrochloride); CBZ
(benzyloxycarbonyl); Boc (tert-butyloxycarbonyl); atm (atmosphere);
DCC (dicyclohexylcarbodiimide); TMS (trimethylsilyl); Ac (acetyl);
TBS (t-butyldimethylsilyl); TMSE (2-(trimethylsilyl)ethyl); BSA
(bovine serum albumin) TIPS (triisopropylsilyl); LAH (Lithium
aluminum hydride); DMAP (4-dimethylaminopyridine); NaOMe (sodium
methoxide); NAD (nicotinamide adenine dinucleotide); DIPEA
(diisopropylethylamine); HPLC (high pressure liquid
chromatography); LC/MS (liquid chromatography/mass spectrometry);
BOP (bis(2-oxo-3-oxazolidinyl)phosphinic chloride); TBAF
(tetra-n-butylammonium fluoride); HBTU
(O-Benzotriazole-1-yl-N,N,N',N'-tetramethyluroniumhexafluoro
phosphate). HEPES (4-(2-hydroxyethyl)-1-piperazine ethane sulfonic
acid); DPPA (diphenylphosphoryl azide); fHNO.sub.3 (fuming
HNO.sub.3); EDTA (ethylenediaminetetraacetic acid); TMEDA
(N,N,N',N'-tetramethyl-1,2-ethanediamine); NBS
(N-bromosuccinimide); dppf (1,1'-bis(diphenylphosphino)ferrocene);
and NIS (N-iodsuccinimide).
[0024] All references to ether are to diethyl ether and brine
refers to a saturated aqueous solution of NaCl.
TERMS AND DEFINITIONS
[0025] "Alkyl" refers to a monovalent saturated hydrocarbon chain
having the specified number of member carbon atoms. For example,
C1-C7 alkyl refers to an alkyl group having from 1 to 7 member
carbon atoms. Alkyl groups may be optionally substituted with one
or more substituents as defined herein. Alkyl groups may be
straight or branched. Representative branched alkyl groups have
one, two, or three branches. Alkyl includes methyl, ethyl, propyl
(n-propyl and isopropyl), butyl (n-butyl, isobutyl, and t-butyl),
pentyl (n-pentyl, isopentyl, and neopentyl), and hexyl.
[0026] "Alkenyl" refers to an unsaturated hydrocarbon chain having
the specified number of member carbon atoms and having one or more
carbon-carbon double bonds within the chain. For example, C2-C6
alkenyl refers to an alkenyl group having from 2 to 6 member carbon
atoms. In certain embodiments, alkenyl groups have one
carbon-carbon double bond within the chain. In other embodiments,
alkenyl groups have more than one carbon-carbon double bond within
the chain. Alkenyl groups may be optionally substituted with one or
more substituents as defined herein. Alkenyl groups may be straight
or branched. Representative branched alkenyl groups have one, two,
or three branches. Alkenyl includes ethylenyl, propenyl, butenyl,
pentenyl, and hexenyl.
[0027] "Alkoxy" refers to an alkyl moiety attached through an
oxygen bridge (i.e. a O--C1-C6 alkyl group wherein C1-C6 is defined
herein). Examples of such groups include methoxy, ethoxy, propoxy,
butoxy, pentoxy and hexoxy.
[0028] "Alkynyl" refers to an unsaturated hydrocarbon chain having
the specified number of member carbon atoms and having one or more
carbon-carbon triple bonds within the chain. For example, C2-C6
alkynyl refers to an alkynyl group having from 2 to 6 member atoms.
In certain embodiments alkynyl groups have one carbon-carbon triple
bond within the chain. In other embodiments, alkynyl groups have
more than one carbon-carbon triple bond within the chain. For the
sake of clarity, unsaturated hydrocarbon chains having one or more
carbon-carbon triple bond within the chain and one or more
carbon-carbon double bond within the chain are referred to as
alkynyl groups. Alkynyl groups may be optionally substituted with
one or more substituents as defined herein. Representative branched
alkynyl groups have one, two, or three branches. Alkynyl includes
ethynyl, propynyl, butynyl, pentynyl, and hexynyl.
[0029] "Aryl" refers to an aromatic hydrocarbon ring system. Aryl
groups are monocyclic ring systems or bicyclic ring systems.
Monocyclic aryl ring refers to phenyl. Bicyclic aryl rings refer to
napthyl and to rings wherein phenyl is fused to a cycloalkyl or
cycloalkenyl ring having 5, 6, or 7 member carbon atoms. Aryl
groups may be optionally substituted with one or more substituents
as defined herein.
[0030] "Cycloalkyl" refers to a saturated hydrocarbon ring having
the specified number of member carbon atoms. Cycloalkyl groups are
monocyclic ring systems. For example, C3-C6 cycloalkyl refers to a
cycloalkyl group having from 3 to 6 member atoms. Cycloalkyl groups
may be optionally substituted with one or more substituents as
defined herein. Cycloalkyl includes cyclopropyl, cyclobutyl,
cyclopentyl, and cyclohexyl.
[0031] "Cycloalkenyl" refers to an unsaturated hydrocarbon ring
having the specified number of member carbon atoms and having a
carbon-carbon double bond within the ring. For example, C3-C6
cycloalkenyl refers to a cycloalkenyl group having from 3 to 6
member carbon atoms. In certain embodiments, cycloalkenyl groups
have one carbon-carbon double bond within the ring. In other
embodiments, cycloalkenyl groups have more than one carbon-carbon
double bonds within the ring. Cycloalkenyl rings are not aromatic.
Cycloalkenyl groups are monocyclic ring systems. Cycloalkenyl
groups may be optionally substituted with one or more substituents
as defined herein. Cycloalkenyl includes cyclopropenyl,
cyclobutenyl, cyclopentenyl, cyclohexenyl, and cyclohexadienyl.
[0032] "Enantiomeric excess" or "ee" is the excess of one
enantiomer over the other expressed as a percentage. As a result,
since both enantiomers are present in equal amounts in a racemic
mixture, the enantiomeric excess is zero (0% ee). However, if one
enantiomer was enriched such that it constitutes 95% of the
product, then the enantiomeric excess would be 90% ee (the amount
of the enriched enantiomer, 95%, minus the amount of the other
enantiomer, 5%).
[0033] "Enantiomerically enriched" refers to products whose
enantiomeric excess is greater than zero. For example,
enantiomerically enriched refers to products whose enantiomeric
excess is greater than 50% ee, greater than 75% ee, or greater than
90% ee.
[0034] "Enantiomerically pure" refers to products whose
enantiomeric excess is 99% ee or greater.
[0035] "Halo" refers to the halogen radicals fluoro, chloro, bromo,
and iodo.
[0036] "Haloalkyl" refers to an alkyl group wherein at least one
hydrogen atom attached to a member atom within the alkyl group is
replaced with halo. The number of halo substituents include but are
not limited to 1, 2, 3, 4, 5, or 6 substituents. Haloalkyl includes
monofluoromethyl, difluoroethyl, and trifluoromethyl.
[0037] "Heteroaryl" refers to an aromatic ring containing from 1 to
5, suitably 1 to 4, more suitably 1 or 2 heteroatoms as member
atoms in the ring. Heteroaryl groups containing more than one
heteroatom may contain different heteroatoms. Heteroaryl groups may
be optionally substituted with one or more substituents as defined
herein. Heteroaryl groups are monocyclic ring systems, or are fused
bicyclic ring systems. Monocyclic heteroaryl rings have from 5 to 6
member atoms. Bicyclic heteroaryl rings have from 8 to 10 member
atoms. Bicyclic heteroaryl rings include those rings wherein the
primary heteroaryl and the secondary monocyclic cycloalkyl,
cycloalkenyl, heterocycloalkyl, aryl or heteroaryl ring are
attached, forming a fused bicyclic ring system. Heteroaryl
includes, among others, pyrrolyl, pyrazolyl, imidazolyl, oxazolyl,
isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl,
furanyl, furazanyl, thienyl, triazolyl, pyridinyl, pyrimidinyl,
pyridazinyl, pyrazinyl, triazinyl, tetrazinyl, tetrazolyl, indolyl,
isoindolyl, indolizinyl, indazolyl, purinyl, quinolinyl,
isoquinolinyl, quinoxalinyl, quinazolinyl, pteridinyl, cinnolinyl,
benzimidazolyl, benzopyranyl, benzoxazolyl, benzisoxazolyl,
benzofuranyl, isobenzofuranyl, benzothiazolyl, benzisothiazolyl,
benzothienyl, furopyridinyl, napthyridinyl, pyrazolopyridyl,
pyrazolopyrimidinyl, 3H-[1,2,3]triazolo[4,5-d]pyrimidinyl, and
3H-[1,2,3]triazolo[4,5-b]pyridinyl.
[0038] "Heteroatom" refers to a nitrogen, sulfur, or oxygen
atom.
[0039] "Heterocycloalkyl" refers to a saturated or unsaturated ring
containing from 1 to 4 heteroatoms as member atoms in the ring.
Heterocycloalkyl rings are not aromatic.
[0040] Heterocycloalkyl groups containing more than one heteroatom
may contain different heteroatoms. Heterocycloalkyl groups may be
optionally substituted with one or more substituents as defined
herein. Heterocycloalkyl groups are monocyclic ring systems or are
fused, spiro, or bridged bicyclic ring systems. Monocyclic
heterocycloalkyl rings have from 4 to 7 member atoms. Bicyclic
heterocycloalkyl rings have from 7 to 11 member atoms. In certain
embodiments, heterocycloalkyl is saturated. In other embodiments,
heterocycloalkyl is unsaturated, but not aromatic. Heterocycloalkyl
includes, among others, pyrrolidinyl, tetrahydrofuranyl,
dihydrofuranyl, pyranyl, tetrahydropyranyl, dihydropyranyl,
tetrahydrothienyl, pyrazolidinyl, oxazolidinyl, thiazolidinyl,
piperidinyl, homopiperidinyl, piperazinyl, morpholinyl,
thiamorpholinyl, 1-pyrazolidinyl, azepinyl, 1,3-dioxanyl,
1,4-dioxanyl, 1,3-oxathiolanyl, 1,3-dithianyl, azetidinyl,
isoxazolidinyl, 3-azabicyclo[3.1.0]hexyl, azabicylo[3.2.1]octyl,
azabicylo[3.3.1]nonyl, azabicylo[4.3.0]nonyl,
2,5-diazabicyclo[2.2.1]heptanyl, octahydropyrrolo[1,2-a]pyrazinyl,
octahydropyrazino[2,1-c][1,4]oxazinyl, oxabicylo[2.2.1]heptyl,
hexahydro-1H-azepinyl,2,3,4,7-tetrahydro-1H-azepinyl,
tetrahydro-5H-[1,3]dioxolo[4,5-c]pyrrolyl,
tetrahydro-1H-furo[3,4-c]pyrrol-(3H)-yl,
hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl,
octahydropyrazino[1,2-a]azepin-(1H)-yl,
hexahydropyrazino[2,1-c][1,4]oxazin-(1H)-yl,
hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl,
10-oxa-4-azatricyclo[5.2.1.02,6]decyl,
octahydro-1(2H)-quinoxalinyl; octahydro-1H-cyclopenta[b]pyrazinyl,
hexahydrofuro[3,4-b]pyrazin-(2H)-yl,
octahydro-6H-pyrrolo[3,4-b]pyridinyl, 4,7-diazaspiro[2.5]octyl, and
5-azaspiro[2.4]heptyl.
[0041] "Member atoms" refers to the atom or atoms that form a chain
or ring. Where more than one member atom is present in a chain and
within a ring, each member atom is covalently bound to an adjacent
member atom in the chain or ring. Atoms that make up a substituent
group on a chain or ring are not member atoms in the chain or
ring.
[0042] "Optionally substituted" indicates that a group, such as
alkyl, alkenyl, alkynyl, aryl, cycloalkyl, cycloalkenyl,
heterocycloalkyl, or heteroaryl, may be unsubstituted, or the group
may be substituted with one or more substituents as defined
herein.
[0043] "Pharmaceutically acceptable" refers to those compounds,
materials, compositions, and dosage forms which are, within the
scope of sound medical judgment, suitable for use in contact with
the tissues of human beings or animals without excessive toxicity,
irritation, or other problem or complication, commensurate with a
reasonable benefit/risk ratio.
[0044] "Substituted" in reference to a group indicates that one or
more hydrogen atoms attached to a member atom within the group is
replaced with a substituent selected from the group of defined
substituents. It should be understood that the term "substituted"
includes the implicit provision that such substitution be in
accordance with the permitted valence of the substituted atom and
the substituent, and that the substitution results in a stable
compound (i.e. one that does not spontaneously undergo
transformation such as by hydrolysis, rearrangement, cyclization,
or elimination, and that is sufficiently robust to survive
isolation from a reaction mixture). When it is stated that a group
may contain one or more substituents, one or more (as appropriate)
member atom within the group may be substituted. In addition, a
single member atom within the group may be substituted with more
than one substituent as long as such substitution is in accordance
with the permitted valence of the atom. Suitable substituents are
defined herein for each substituted or optionally substituted
group.
[0045] "Sulfanyl" refers to an alkyl moiety attached through a
sulphur bridge (i.e --S--C1-C6 alkyl group wherein C1-C6 alkyl is
as defined herein). Examples of sulfanyl groups include thiomethyl
and thioethyl.
Compounds
[0046] The present invention is directed to compounds according to
Formula I:
##STR00005##
wherein R1 is selected from the group consisting of C2-C7 alkyl and
--(CH.sub.2).sub.n--C3-C6 cycloalkyl; R2 is selected from the group
consisting of C1-C3 alkyl; cyclopropyl; C1-C3 alkoxy; C1-C3
haloalkyl; C1-C3 sulfanyl; 5-membered heteroaryl; 5-membered
heterocycloalkyl; halo; hydroxymethyl; and NRaRb; R3 is selected
from the group consisting of --NR4R5; halo; phenyl, optionally
substituted by one to three R6 groups; and heteroaryl, optionally
substituted by one to three R6 groups; R4 is selected from the
group consisting of H; C1-C6 alkyl, optionally substituted with one
or two R7 groups; C1-C6 alkoxy; C3-C6 cycloalkyl, optionally
substituted with one to three R6 groups; heterocycloalkyl,
optionally substituted by one to three R6 groups; heteroaryl,
optionally substituted by one to three R6 groups; and phenyl,
optionally substituted by one to three R6 groups; R5 is selected
from H; C1-C6 alkyl, optionally substituted with one or two R7
groups; C1-C6 alkoxy; C3-C6 cycloalkyl, optionally substituted with
one to three R6 groups; heterocycloalkyl, optionally substituted by
one to three R6 groups; heteroaryl, optionally substituted by one
to three R6 groups; and phenyl, optionally substituted by one to
three R6 groups; or R4 and R5 are joined together with the N-atom
to which they are attached, forming a heterocycloalkyl group
optionally substituted with one to three R6 groups; each R6 is
independently selected from the group consisting of C1-C6 alkyl,
optionally substituted with one to three R7 groups; hydroxy; C1-C3
alkoxy; --C(O)NRaRb; --C(O)Rc; --C(O)ORc; heterocycloalkyl; C3-C6
cycloalkyl optionally substituted with one --NRaRb or pyrrolidinyl;
oxo; cyano; --NRaRb; phenyl; heteroaryl; and halo; each R7 is
independently selected from the group consisting of hydroxy; C1-C3
alkoxy; halo; phenyl; cyano; --NRaRb; --C(O)NRaRb; --C(O)Rc; C3-C6
cycloalkyl, optionally substituted with one hydroxy,
heterocycloalkyl or --NRaRb group; heterocycloalkyl; and heteroaryl
optionally substituted with one methyl, --NRaRb or hydroxy; each Ra
is each independently selected from the group consisting of H and
C1-C3 alkyl optionally substituted with one hydroxy, methoxy, or
dimethylamine; each Rb is independently selected from the group
consisting of H and C1-C3 alkyl; each Rc is independently selected
from the group consisting of C1-C3 alkyl optionally substituted
with one methoxy group; phenyl; heterocycloalkyl; and heteroaryl;
and n is an integer from 0 to 2.
[0047] The compounds according to Formula I may contain one or more
asymmetric centers (also referred to as a chiral center) and may,
therefore, exist as individual enantiomers, diastereomers, or other
stereoisomeric forms, or as mixtures thereof. Chiral centers, such
as chiral carbon atoms, may also be present in a substituent such
as an alkyl group. Where the stereochemistry of a chiral center
present in Formula I, or in any chemical structure illustrated
herein, is not specified, the structure is intended to encompass
all individual stereoisomers and all mixtures thereof. Thus,
compounds according to Formula I containing one or more chiral
centers may be used as racemic mixtures, diastereomeric mixtures,
enantiomerically enriched mixtures, diastereomerically enriched
mixtures, or as enantiomerically and diastereomerically pure
individual stereoisomers.
[0048] Individual stereoisomers of a compound according to Formula
I which contain one or more asymmetric centers may be resolved by
methods known to those skilled in the art. For example, such
resolution may be carried out (1) by formation of diastereoisomeric
salts, complexes or other derivatives; (2) by selective reaction
with a stereoisomer-specific reagent, for example by enzymatic
oxidation or reduction; or (3) by gas-liquid or liquid
chromatography in a chiral environment, for example, on a chiral
support such as silica with a bound chiral ligand or in the
presence of a chiral solvent. The skilled artisan will appreciate
that where the desired stereoisomer is converted into a
diastereomeric salt, complex or derivative, a further step is
required to liberate the desired form. Alternatively, specific
stereoisomers may be synthesized by asymmetric synthesis using
optically active reagents, substrates, catalysts or solvents, or by
converting one enantiomer to the other by asymmetric
transformation.
[0049] The compounds according to Formula I may also contain double
bonds or other centers of geometric asymmetry. Where the
stereochemistry of a center of geometric asymmetry present in
Formula I, or in any chemical structure illustrated herein, is not
specified, the structure is intended to encompass the trans (E)
geometric isomer, the cis (Z) geometric isomer, and all mixtures
thereof. Likewise, all tautomeric forms are also included in
Formula I whether such tautomers exist in equilibrium or
predominately in one form.
[0050] In certain embodiments, compounds according to Formula I may
contain an acidic functional group. In certain other embodiments,
compounds according to Formula I may contain a basic functional
group. Thus, the skilled artisan will appreciate that salts of the
compounds according to Formula I may be prepared. Indeed, in
certain embodiments of the invention, salts of the compounds
according to Formula I may be preferred over the respective free
base or free acid because, for example, such salts may impart
greater stability or solubility to the molecule thereby
facilitating formulation into a dosage form. Accordingly, the
invention is further directed pharmaceutically acceptable salts of
the compounds according to Formula I. For a review on suitable
salts see Berge et al, J. Pharm. Sci., 1977, 66, 1-19.
[0051] Acid salts: Suitable addition salts are formed from acids
which form non-toxic salts and examples are hydrochloride,
hydrobromide, hydroiodide, sulphate, bisulphate, nitrate,
phosphate, hydrogen phosphate, acetate, maleate, malate, fumarate,
malonate, lactate, tartrate, citrate, formate, gluconate,
succinate, piruvate, oxalate, oxaloacetate, trifluoroacetate,
saccharate, benzoate, methanesulphonate, ethanesulphonate,
benzenesulphonate, p-toluenesulphonate, methanesulphonic,
ethanesulphonic, p-toluenesulphonic, and isethionate.
[0052] Base salts: Pharmaceutically acceptable base salts include
ammonium salts, alkali metal salts such as those of sodium and
potassium, alkaline earth metal salts such as those of calcium and
magnesium and salts with organic bases, including salts of primary,
secondary and tertiary amines, such as isopropylamine,
diethylamine, ethanolamine, trimethylamine, dicyclohexyl amine and
N-methyl-D-glucamine.
[0053] As used herein, the term "pharmaceutically acceptable salts"
refers to salts that retain the desired biological activity of the
subject compound and exhibit minimal undesired toxicological
effects. These pharmaceutically acceptable salts may be prepared in
situ during the final isolation and purification of the compound,
or by separately reacting the purified compound in its free acid or
free base form with a suitable base or acid, respectively.
[0054] As used herein, the term "compounds of the invention" means
both the compounds according to Formula I and salts thereof,
including pharmaceutically acceptable salts. The term "a compound
of the invention" also appears herein and refers to both a compound
according to Formula I and its salts, including pharmaceutically
acceptable salts.
[0055] The compounds of the invention may exist in solid or liquid
form. In the solid state, the compounds of the invention may exist
in crystalline or noncrystalline form, or as a mixture thereof. For
compounds of the invention that are in crystalline form, the
skilled artisan will appreciate that pharmaceutically-acceptable
solvates may be formed wherein solvent molecules are incorporated
into the crystalline lattice during crystallization. Solvates may
involve nonaqueous solvents such as ethanol, isopropanol, DMSO,
acetic acid, ethanolamine, and ethyl acetate, or they may involve
water as the solvent that is incorporated into the crystalline
lattice. Solvates wherein water is the solvent that is incorporated
into the crystalline lattice are typically referred to as
"hydrates." Hydrates include stoichiometric hydrates as well as
compositions containing variable amounts of water. The invention
includes all such solvates.
[0056] The skilled artisan will further appreciate that certain
compounds of the invention that exist in crystalline form,
including the various solvates thereof, may exhibit polymorphism
(i.e. the capacity to occur in different crystalline structures).
These different crystalline forms are typically known as
"polymorphs." The invention includes all such polymorphs.
Polymorphs have the same chemical composition but differ in
packing, geometrical arrangement, and other descriptive properties
of the crystalline solid state. Polymorphs, therefore, may have
different physical properties such as shape, density, hardness,
deformability, stability, and dissolution properties. Polymorphs
typically exhibit different melting points, IR spectra, and X-ray
powder diffraction patterns, which may be used for identification.
The skilled artisan will appreciate that different polymorphs may
be produced, for example, by changing or adjusting the reaction
conditions or reagents used in making the compound, or by using
different isolation or purification procedures. For example,
changes in temperature, pressure, or solvent may result in
polymorphs. In addition, one polymorph may spontaneously convert to
another polymorph under certain conditions.
[0057] In one embodiment of the present invention R1 is
--(CH.sub.2).sub.n--C3-C6 cycloalkyl. Suitably, R1 is
--(CH.sub.2).sub.n--C3-C6 cycloalkyl wherein n is 1. Suitably R1 is
--CH.sub.2-cyclopentyl.
[0058] In another embodiment of the present invention R2 is C1-C3
alkyl; C1-C3 alkoxy; C1-C3 haloalkyl; C1-C3 sulfanyl; or halo.
Suitably R2 is methyl; ethyl; thiomethyl; thioethyl; fluoromethyl;
difluoromethyl; 1-fluoromethyl; chloro; cyclopropyl; or methoxy.
Suitably R2 is methyl; ethyl; thiomethyl; or chloro.
[0059] In another embodiment of the present invention R3 is
--NR4R5; C1-C6 alkoxy; or heteroaryl, optionally substituted by one
to three R6 groups. Suitably R3 is --NR4R5 wherein R4 is C1-C6
alkyl, optionally substituted with one or two R7 groups; or C3-C6
cycloalkyl, optionally substituted by one to three R6 groups; and
R5 is H, C1-C6 alkyl, or C1-C6 alkoxy.
[0060] In another embodiment of the present invention R4 is
cyclopropyl; cyclobutyl; cyclopentyl; tetrahydro-2H-pyranyl;
2-oxohexahydro-1H-azepinyl; 2-oxo-2,3,4,7-tetrahydro-1H-azepinyl;
5-fluoro-pyridinyl; or C1-C6 alkyl optionally substituted with one
of the following R7 groups selected from the group consisting of
hydroxyl; methoxy; cyano; --C(O)NRaRb; --C(O)Rc; morpholinyl;
pyridinyl; 1,3-thiazolyl; 2-amino-1,3-thiazoyl; thienyl; furanyl;
phenyl; and 1-hydroxy-1H-imidazolyl; and R5 is H; C1-C3 alkyl;
cyclopropyl; or piperazinyl optionally substituted with one R6
group.
[0061] In another embodiment R4 is methyl; ethyl optionally
substituted with one substituent selected from the group consisting
of: hydroxyl, methoxy and NRaRb; propyl; isopropyl; cyclopropyl;
cyclobutyl; and cyclopentyl.
[0062] In another embodiment of the present invention R5 is
selected from the group consisting of H; C1-C6 alkyl; C1-C6 alkoxy;
and C3-C6 cycloalkyl. Suitabley R5 is H; methyl; or methoxy.
Suitably R5 is H; C1-C3 alkyl; cyclopropyl; or piperazinyl
optionally substituted with one R6 group.
[0063] In another embodiment of the present invention R3 is --NR4R5
wherein R4 and R5 are joined together with the N-atom to which they
are attached to form a heterocycloalkyl group optionally
substituted with one to three R6 groups. Suitably R3 is --NR4R5
wherein R4 and R5 are joined together with the N-atom to which they
are attached forming azetidinyl; pyrrolidinyl; piperazinyl;
morpholinyl; 2,5-dihydro-1H-pyrrolyl;
hexahydropyrazino[2,1-c][1,4]oxazin-(1H)-yl; isoxazolidinyl;
hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl; or
2,5-diazabicyclo[2.2.1]heptyl each of which may be optionally
substituted with one to three R6 groups.
[0064] In another embodiment of the present invention R3 is --NR4R5
wherein R4 and R5 are joined together with the N-atom to which they
are attached forming 1-piperidinyl; 4-thiomorpholinyl;
1-pyrazolidinyl; tetrahydro-5H-[1,3]dioxolo[4,5-c]pyrrolyl;
tetrahydro-1H-furo[3,4-c]pyrrol-(3H)-yl;
hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl;
hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl;
hexahydropyrazino[2,1-c][1,4]oxazin-(1H)-yl;
hexahydrofuro[3,4-b]pyrazin-(2H)-yl;
octahydro-2H-pyrido[1,2-a]pyrazinyl;
octahydropyrazino[1,2-a]azepin-(1H)-yl;
octahydropyrazino[2,1-c][1,4]oxazinyl;
octahydro-1H-cyclopenta[b]pyrazinyl; octahydro-1(2H)-quinoxalinyl;
octahydro-6H-pyrrolo[3,4-b]pyridinyl; 3-azabicyclo[3.1.0]hexyl;
2,5-diazabicyclo[2.2.1]heptyl; 4,7-diazaspiro[2.5]octyl;
5-azaspiro[2.4]heptyl; or
10-oxa-4-azatricyclo[5.2.1.02,6]decyl.
[0065] Suitably R3 is --NR4R5 wherein R4 and R5 are joined together
with the N-atom to which they are attached forming azetidinyl
optionally substituted with one or two R6 groups each independently
selected from the group consisting of methyl; ethyl; fluoro;
methoxy; hydroxyl; hydroxymethyl; cyclopropyl; dimethylamino;
ethylmethylamino; --CH.sub.2-dimethylamino; morpholinyl;
pyrrolidinyl; --CH.sub.2-pyrrolidinyl; and pyridinyl.
[0066] Suitably R3 is --NR4R5 wherein R4 and R5 are joined together
with the N-atom to which they are attached forming pyrrolidinyl
optionally substituted with one to three R6 groups each
independently selected from the group consisting of methyl;
methoxy; --CH.sub.2-methoxy; hydroxyl; hydroxymethyl; hydroxyethyl;
dimethylamino; ethylmethylamino; --CH.sub.2-dimethylamino;
--CH.sub.2-pyrrolidinyl; --CH.sub.2-morpholinyl; pyridinyl;
2-(dimethylamino)-1,1-dimethylethyl; fluoromethyl;
--CH.sub.2-2-hydroxyethylmethylamino;
--CH.sub.2-2-methoxyethylamino; cyano; --C(O)N(CH.sub.3).sub.2;
1-(dimethyamino)cyclopropyl; --CH.sub.2-ethylemethylamino;
--CH.sub.2-diethylamino; --C(O)N(CH.sub.2CH.sub.3).sub.2;
--CH.sub.2-piperidinyl; --CH.sub.2 isopropylmethylamino;
--CH.sub.2-propylmethylamino; --NHCOOCH.sub.3;
CH.sub.2-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl; and
(cis)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]dec-4-yl.
[0067] Suitably R3 is --NR4R5 wherein R4 and R5 are joined together
with the N-atom to which they are attached forming piperazinyl
optionally substituted with one to three R6 groups each
independently selected from the group consisting of methyl; ethyl;
isopropyl; hydroxymethyl; hydroxyethyl; --CH.sub.2--O--CH.sub.3;
and --COOCH.sub.3.
[0068] Suitably R3 is --NR4R5 wherein R4 and R5 are joined together
with the N-atom to which they are attached forming
(9aS)-octahydropyrazino[2,1-c][1,4]oxazinyl.
[0069] In another embodiment of the present invention R6 is C1-C3
alkyl, optionally substituted with one to three R7 groups; hydroxy;
C1-C3 alkoxy; --C(O)NRaRb; or --NRaRb. Suitably R6 is methyl;
ethyl; isopropyl; methoxy; hydroxyl; diethylamino; or
N,N-dimethylacetamido.
[0070] In another embodiment R6 is heteroaryl. Suitably R6 is a
6-membered heteroaryl. Suitably R6 is pyridinyl.
[0071] In another embodiment of the present invention R7 is C1-C3
alkoxy; hydroxyl; or --NRaRb. Suitably R7 is methoxy.
[0072] In another embodiment R7 is heterocycloalkyl. Suitably R7 is
a 6-membered heterocycloalkyl. Suitably R7 is morpholinyl.
[0073] In another embodiment R7 is heteroaryl. Suitably R7 is
pyridinyl; 1,3-thiazolyl; thienyl; furanyl; imidazolyl;
1H-benzamidazolyl; 3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl; or
3H-[1,2,3]triazolo[4,5-b]pyridin-3-yl.
[0074] In another embodiment of the present invention Ra and Rb are
both methyl.
[0075] In another embodiment of the present invention Rc is
heterocycloalkyl. Suitabley Rc is pyrrolidinyl.
[0076] Another embodiment of the present invention is a compound
according to Formula (I) wherein:
R1 is selected from the group consisting of C2-C7 alkyl and
--(CH.sub.2).sub.n--C3-C6 cycloalkyl; R2 is selected from the group
consisting of C1-C3 alkyl; cyclopropyl; C1-C3 alkoxy; C1-C3
haloalkyl; C1-C3 sulfanyl; 5-membered heteroaryl; 5-membered
heterocycloalkyl; halo; hydroxymethyl; and --NRaRb; R3 is selected
from the group consisting of --NR4R5; halo; phenyl, optionally
substituted by one to three R6 groups; and heteroaryl, optionally
substituted by one to three R6 groups; R4 is selected from the
group consisting of H; C1-C6 alkyl, optionally substituted with one
or two R7 groups; C1-C6 alkoxy; C3-C6 cycloalkyl, optionally
substituted with one to three R6 groups; heterocycloalkyl,
optionally substituted by one to three R6 groups; heteroaryl,
optionally substituted by one to three R6 groups; and phenyl,
optionally substituted by one to three R6 groups; R5 is selected
from the group consisting of H; C1-C6 alkyl, optionally substituted
with one or two R7 groups; C1-C6 alkoxy; C3-C6 cycloalkyl,
optionally substituted with one to three R6 groups;
heterocycloalkyl, optionally substituted by one to three R6 groups;
heteroaryl, optionally substituted by one to three R6 groups; and
phenyl, optionally substituted by one to three R6 groups; or R4 and
R5 are joined together with the N-atom to which they are attached,
forming a heterocycloalkyl group optionally substituted with one to
three R6 groups; each R6 is independently selected from the group
consisting of C1-C6 alkyl, optionally substituted with one to three
R7 groups; hydroxy; C1-C3 alkoxy; --C(O)NRaRb; --C(O)Rc;
heterocycloalkyl; C3-C6 cycloalkyl; oxo; cyano; --NRaRb; phenyl;
heteroaryl; and halo; each R7 is independently selected from the
group consisting of hydroxy; C1-C3 alkoxy; halo; phenyl; cyano;
--NRaRb; --C(O)NRaRb; --C(O)Rc; C3-C6 cycloalkyl, optionally
substituted with one hydroxy, heterocycloalkyl or --NRaRb group;
heterocycloalkyl; and heteroaryl; each Ra is independently selected
from the group consisting of H and C1-C3 alkyl; each Rb is
independently selected from the group consisting of H and C1-C3
alkyl; each Rc is independently selected from the group consisting
of C1-C3 alkyl; phenyl; heterocycloalkyl; and heteroaryl; and n is
an integer from 0 to 2.
[0077] Another embodiment of the present invention is a compound
according to Formula (I) wherein:
R1 is --CH.sub.2-cyclopentyl; R2 is selected from the group
consisting of methyl; ethyl; thiomethyl; thioethyl; fluoromethyl;
difluoromethyl; 1-fluoromethyl; chloro; cyclopropyl; or
methoxy;
R3 is --NR4R5;
[0078] R4 is selected from the group consisting of H; C1-C3 alkyl;
cyclopropyl; and piperazinyl optionally substituted with one R6
group; R5 is selected from the group consisting of H; C1-C6 alkyl,
optionally substituted with one or two R7 groups; C1-C6 alkoxy;
C3-C6 cycloalkyl, optionally substituted with one to three R6
groups; heterocycloalkyl, optionally substituted by one to three R6
groups; heteroaryl, optionally substituted by one to three R6
groups; and phenyl, optionally substituted by one to three R6
groups; or R4 and R5 are joined together with the N-atom to which
they are attached, forming a heterocycloalkyl group optionally
substituted with one to three R6 groups; each R6 is independently
selected from the group consisting of C1-C6 alkyl, optionally
substituted with one to three R7 groups; hydroxy; C1-C3 alkoxy;
--C(O)NRaRb; --C(O)Rc; C(O)ORc; heterocycloalkyl; C3-C6 cycloalkyl
optionally substituted with one NRaRb or pyrrolidinyl; oxo; cyano;
NRaRb; phenyl; heteroaryl; and halo; each R7 is independently
selected from the group consisting of hydroxy; C1-C3 alkoxy; halo;
phenyl; cyano; --NRaRb; --C(O)NRaRb; --C(O)Rc; C3-C6 cycloalkyl,
optionally substituted with one hydroxy, heterocycloalkyl or
--NRaRb group; heterocycloalkyl; and heteroaryl optionally
substituted with one methyl, --NRaRb or hydroxy; each Ra is each
independently selected from H and C1-C3 alkyl optionally
substituted with one hydroxy, methoxy group or dimethylamine; each
Rb is independently selected from H and C1-C3 alkyl; and each Rc is
independently selected from C1-C3 alkyl optionally substituted with
one methoxy group; phenyl; heterocycloalkyl; and heteroaryl.
[0079] Specific examples of compounds of the present invention
include the following: [0080]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidinyl)-4--
pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0081]
[(2R)-3-{2-[6-(1-Azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0082]
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0083]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0084]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydr-
azino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0085]
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0086]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-morpholinyl)-4-p-
yrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0087]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(methyloxy)a-
mino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide; [0088]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro-
-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0089]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1,3-thiazolidin-3--
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0090]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(methyloxy)-1-az-
etidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide;
[0091]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3R)-3-(methyloxy)-
-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide;
[0092]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-(met-
hyloxy)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformam-
ide; [0093]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1-methylethyl)ami-
no]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide; [0094]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(methylox-
y)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyformamide;
[0095]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[ethyl(methyl)amino]-5-fluoro--
2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide;
[0096]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-py-
rrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide-
; [0097]
[(2R)-3-{2-[6-(Cyclobutylamino)-5-fluoro-2-methyl-4-pyrimidinyl]h-
ydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[0098]
[(2R)-3-{2-[6-(Cyclopentylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazin-
o}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0099]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(3R)-3-(hydroxymethyl)-1-py-
rrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide-
; [0100]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(3S)-3-(hydroxymeth-
yl)-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyf-
ormamide; [0101]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide; [0102]
((2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazi-
nyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0103]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(2-isoxazolidinyl)-
-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide; [0104]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3-(dimethylamino)-1-pyrrolidi-
nyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide; [0105]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3-(dimethylamino)-1-pyrrolidi-
nyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide; [0106]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(3S)-3-hydroxy-1--
pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide;
[0107]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(3R)-3-hyd-
roxy-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformam-
ide; [0108]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[6-(cyclopropylamino)-2-ethyl-5-fluoro-
-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide; [0109]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-6-(4-ethyl-1-piperazinyl)-5-f-
luoro-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide;
[0110]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[4-(2-hydroxyethyl-
)-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide;
[0111]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(methylamin-
o)-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide; [0112]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-6-(ethylamino)-5-fluoro-4-pyr-
imidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide; [0113]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[4-(1-methylethyl)-
-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide;
[0114]
1-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propan-
oyl]hydrazino}-2-ethyl-5-fluoro-4-pyrimidinyl)-N,N-dimethyl-L-prolinamide;
[0115]
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{[2-(dimethylamino)ethyl](me-
thyl)amino}-2-ethyl-5-fluoro-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydro-
xyformamide; [0116]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-2-
-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide;
[0117]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperaz-
inyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyform-
amide; [0118]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazinyl)-2-(-
methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0119]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(ethylamino)-5-fluoro-2-(methylthio)--
4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0120]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(methylamino)-2-(methylthio)-
-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0121]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3S)-3-hydroxy-1-pyrrolidin-
yl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0122]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(dimethylamino)-5-fluoro-2-(me-
thylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0123]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(methylthio)-6-(propylamino)-
-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide; [0124]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-{[2-(methyloxy)ethyl]amino}--
2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0125]
1-[6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propan-
oyl)hydrazino]-5-fluoro-2-(methylthio)-4-pyrimidinyl]-N,N-dimethyl-L-proli-
namide; [0126]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3R)-3-hydroxy-1-pyrrolidin-
yl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0127]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3-(dimethylamino)-1-pyrr-
olidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hyd-
roxyformamide; [0128]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(m-
ethylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide;
[0129]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-morpholinyl)-4-pyrimidinyl]hydrazino}--
2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0130]
[(2R)-3-{2-[6-(1-Azetidinyl)-2-chloro-5-fluoro-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0131]
[(2R)-3-{2-[2-Chloro-6-(4-ethyl-1-piperazinyl)-5-fluoro-4-pyrimidinyl]hyd-
razino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0132]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-hydroxyethyl)(methyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[0133]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-(methyloxy)-1-azetidinyl]-4-pyrimidiny-
l}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[0134]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{methyl[2-(methyloxy)ethyl]amino}-4-pyrim-
idinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[0135]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(8aS)-hexahydropyrrolo[1,2-a]pyra-
zin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]h-
ydroxyformamide; [0136]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]-
hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide; [0137]
1-{6-Chloro-2-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methyl}prop-
anoyl)hydrazino]-5-fluoro-4-pyrimidinyl}-N,N-dimethyl-L-prolinamide;
[0138]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(propylamino)-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide; [0139]
[(2R)-3-(2-{2-Chloro-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[0140]
[(2R)-3-(2-{2-Chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e; [0141]
[(2R)-3-(2-{2-Chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluor-
o-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformam-
ide; [0142]
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
and [0143]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,-
4]oxazin-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopro-
pyl]hydroxyformamide; or a salt thereof.
[0144] One embodiment of the present invention is a compound which
is
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide or a salt thereof.
[0145] Another embodiment of the present invention is a compound
which is
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
or a salt thereof.
[0146] Another embodiment of the present invention is a compound
which is
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
or a salt thereof.
[0147] Another embodiment of the present invention is a compound
which is
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4--
pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
or a salt thereof.
[0148] Another embodiment of the present invention is a compound
which is
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-diaza-
spiro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
or a salt thereof.
Compound Preparation
[0149] The compounds according to Formula I are prepared using
conventional organic syntheses. Suitable synthetic routes are
depicted below in the following general reaction schemes.
[0150] The skilled artisan will appreciate that if a substituent
described herein is not compatible with the synthetic methods
described herein, the substituent may be protected with a suitable
protecting group that is stable to the reaction conditions. The
protecting group may be removed at a suitable point in the reaction
sequence to provide a desired intermediate or target compound.
Suitable protecting groups and the methods for protecting and
de-protecting different substituents using such suitable protecting
groups are well known to those skilled in the art; examples of
which may be found in T. Greene and P. Wuts, Protecting Groups in
Chemical Synthesis (3rd ed.), John Wiley & Sons, NY (1999). In
some instances, a substituent may be specifically selected to be
reactive under the reaction conditions used. Under these
circumstances, the reaction conditions convert the selected
substituent into another substituent that is either useful as an
intermediate compound or is a desired substituent in a target
compound.
##STR00006##
[0151] As shown in Scheme 1, (11) can be prepared by reacting an
appropriate acid chloride (2) with a chiral agent, such as
(S)-(-)-4-benzyl-2-oxazolidinone (Evans' chiral oxazolidinone), in
the presence of a base, such as n-butyl lithium, to afford the
chiral intermediate (3). Treatment of the compound (3) with a base,
such as diisopropylethylamine, in the presence of a chelating
agent, such as titanium tetrachloride, in a solvent, such as
tetrahydrofuran, followed by addition of an electrophile, such as
benzyloxymethylchloride, provides compound (4). Conversion of
compound (4) to the corresponding hydroxyacid (7) can be achieved
by a sequence comprising oxidative cleavage of the chiral
oxazolidinone, using, for example H.sub.2O.sub.2 and lithium
hydroxide, to the respective intermediate (5), followed by
hydrogenolysis, to afford intermediate (7). Compound (3) can also
be converted to intermediate (7) in an alternative two-step
procedure. For this transformation, (3) can be treated with a base,
such as diisopropylethylamine, in the presence of a chelating
agent, such as titanium tetrachloride, in a solvent, such as
tetrahydrofuran, followed by addition of trioxane or a suitable
alternative formaldehyde equivalent to provide compound (6), which
is then submitted to oxidative cleavage of the chiral
oxazolidinone, using, for example H.sub.2O.sub.2 and lithium
hydroxide, to the respective acid (7).
[0152] Coupling of acid (7) with benzyloxyamine in the presence of
coupling agents, such as EDC and DMAP, yields the amide (8). This
can be cyclized to azetidin-2-one (9) using Mitsunobu conditions.
Hydrolysis of the azetidin-2-one (9), using for example lithium
hydroxide in an appropriate solvent, gives the corresponding acid
(10). Conversion of compound (10) to product (11) can be achieved
using an appropriate formylating agent, such as formic acid/acetic
anhydride or methyl formate, in neat reagents or in an appropriate
solvent, such as dichloromethane.
##STR00007##
[0153] As shown in Scheme 2, THP-protected intermediate (15) can be
prepared by hydrogenation of azetidin-2-one (9) using a catalyst,
such as 10% Pd/C, in an appropriate solvent, such as ethanol to
provide (12). Treatment of (12) with dihydropyran under acid
catalysis, such as pyridinium p-toluenesulfonate, in an appropriate
solvent, such as methylene chloride, provides THP-protected
azetidin-2-one (13). Hydrolysis of azetidin-2-one (13), using for
example lithium hydroxide in an appropriate solvent, gives the
corresponding acid (14). Conversion of compound (14) to the product
(15) can be achieved using an appropriate formylating agent, such
as formic acid/acetic anhydride or methyl formate, in neat reagents
or in an appropriate solvent, such as dichloromethane. Conversion
of compound (14) to product (15) can also be accomplished using
5-methyl-2-thioxo-[1,3,4]thiadiazole-3-carbaldehyde (Yazawa,
Hisatoyo; Goto, Shunsuke; Tetrahedron Lett. 26; 31; 1985;
3703-3706) as a formylating agent in an appropriate solvent, such
as acetone.
[0154] Intermediate (15) can also be prepared according to
literature procedures [Bracken, Bushell, Dean, Francavilla, Jain,
Lee, Seepersaud, Shu, Sundram, Yuan; PCT Int. Appl. (2006), WO
2006127576 A2].
##STR00008##
[0155] As shown in Scheme 3, coupling of the chiral acid (11 or 15)
with the pyrimidinyl hydrazine (16, R2=alkyl, halo, H), using
conditions such as EDC-HOAt-NMM, provides the hydrazide (17 or 18).
Final deprotection (hydrogenolysis using a catalyst, such as 10%
Pd/C, in an appropriate solvent, such as ethanol, in the case that
P is Bn; treatment with 80% acetic acid-water at room temperature
or 40.degree. C. in the case that P is THP) gives the final desired
compounds (1), where R2=alkyl, halo, H.
[0156] Hydrazines of general structure (16) may be prepared
according to literature methods by those skilled in the art. The
following examples of specific structures of hydrazines (16) and
the synthetic methods used to generate them are merely illustrative
and are not to be construed as a limitation of the scope of the
present invention.
[0157] Hydrazines (24) where R2 is alkyl and R3 is an amino group
(R4R5N) may be prepared from the appropriate precursors as shown in
Scheme 4.
##STR00009##
[0158] As shown in Scheme 4, hydrazine (24) when R2 is hydrogen or
alkyl can be prepared from the condensation of
commercially-available fluoromalonate (19) and the appropriate
amidine (20) under basic conditions to provide pyrimidinone (21).
Amidines (20) are commercially available or may be prepared
according to literature methods by those skilled in the art.
Treatment of pyrimidinone (21) with POCl.sub.3 provides
dichloropyrimidine (22). Treatment of dichloropyrimidine (22) with
the desired amine R4R5NH at room temperature in an appropriate
solvent, such as methanol or DMSO, followed by further treatment
with hydrazine monohydrate, in an appropriate solvent, such as
DMSO, usually with heating, then provides the desired product (24)
where R2 is hydrogen or alkyl.
[0159] Hydrazines of formula (30) [(16) in which R2=chloro] may be
prepared as shown in either Schemes 5 or 6.
##STR00010##
[0160] Condensation of commercially-available fluoromalonate (19)
and urea under basic conditions provides pyrimidinone (25).
Treatment of pyrimidinone (25) with POCl.sub.3 provides
trichloropyrimidine (26). Treatment of trichloropyrimidine (26)
with Boc-protected hydrazine and diisopropylethylamine at room
temperature in an appropriate solvent, such as THF, provides
intermediate (27). Further treatment with di-t-butyldicarbonate in
the presence of diisopropylethylamine and DMAP, in an appropriate
solvent, such as methylene chloride, then provides the desired
tri-Boc-protected product (28). Treatment of (28) with amine
R4R5NH, in an appropriate solvent such as DMF, provides pyrimidine
(29), and deprotection of (29) under acidic conditions, followed by
a basic workup, provides the desired hydrazines (30).
[0161] Alternatively, hydrazines of formula (30) may be prepared as
shown in Scheme 6.
##STR00011##
[0162] Treatment of trichloropyrimidine (26) with the desired amine
R4R5NH at room temperature in an appropriate solvent, such as DMSO,
followed by further treatment with hydrazine monohydrate and
heating, provides the desired product (30), as well as the
regioisomeric product (32). The two regioisomers can usually be
separated chromatographically, such as by HPLC.
[0163] Final compounds (1) where R2 is thiomethyl or methoxy can be
prepared as shown in Scheme 7.
##STR00012## ##STR00013##
[0164] Condensation of commercially-available fluoromalonate (19)
and either O-methylisourea hemisulfate or S-methylisothiourea
hemisulfate under basic conditions provides pyrimidinone (33), in
which R2 is methoxy or thiomethyl, respectively. Treatment of
pyrimidinone (33) with POCl.sub.3 provides dichloropyrimidine (34).
Treatment of dichloropyrimidine (34) with hydrazine monohydrate, in
an appropriate solvent, such as methanol, provides
pyrimidinylhydrazine (35), which is then coupled to acid (11) or
(15) using conditions such as EDC-HOAt-NMM to provide intermediate
(36). Addition of R4R5NH to intermediate (36) provides either the
O-Bn-protected or O-THP-protected product (37). Final deprotection
by either hydrogenolysis using a catalyst such as 10% Pd/C, in an
appropriate solvent, such as ethanol, in the case that P is Bn; or
treatment with 80% acetic acid-water at room temperature or
40.degree. C. in the case that P is THP, gives the final desired
compounds (1) when R2 is methoxy or thiomethyl, respectively.
[0165] Amines R4R5NH may be purchased from available commercial
sources, prepared according to literature methods by those skilled
in the art, or prepared as disclosed in the examples herein.
Methods of Use
[0166] The compounds of the invention are inhibitors of microbial
peptide deformylase (PDF) and are, therefore, capable of preventing
bacterial growth. These compounds are potentially useful in the
treatment of infectious diseases wherein the underlying pathology
is (at least in part) attributable to (i.e. caused by) a variety of
prokaryotic organisms. Examples include, but are not limited to,
Gram positive and Gram negative aerobic and anaerobic bacteria from
the genera Streptococcus, e.g. S. pneumoniae and S. pyogenes,
Staphylococcus, e.g. S. aureus, S. epidermidis, and S.
saprophyticus, Moraxella, e.g. M. catarrhalis, Haemophilus, e.g. H.
influenzae, Neisseria, Mycoplasma, e.g. M. pneumoniae, Legionella,
e.g. L. pneumophila, Chlamydia, e.g. C. pneumoniae, Bacteroides,
Clostridium, Fusobacterium, Propionibacterium, and
Peptostreptococcus.
[0167] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Streptococcus, more suitably S. pneumoniae or S. pyogenes.
[0168] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Staphylococcus, more suitably S. aureus, S. epidermidis, or S.
saprophyticus.
[0169] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Moraxella, more suitably M. catarrhalis.
[0170] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Haemophilus, more suitably H. influenzae.
[0171] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Neisseria.
[0172] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Mycoplasma, more suitably M. pneumoniae.
[0173] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Legionella, more suitably L. pneumophila.
[0174] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Chlamydia, more suitably C. pneumoniae.
[0175] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Bacteroides.
[0176] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Clostridium.
[0177] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Fusobacterium.
[0178] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Propionibacterium.
[0179] Suitably the compounds of the present invention may be
useful in the treatment of bacterial infections caused by
Peptostreptococcus.
[0180] The compounds of the invention may also be useful in the
treatment of bacterial infections caused by bacteria that are
resistant to .beta.-lactam, quinolone, macrolides, ketolides,
glycopeptide, and oxazolidinone classes of antibiotics. Such drug
resistant bacterial infections include, but are not limited to,
penicillin, macrolide or levofloxacin resistant S. pneumoniae;
methicillin or macrolide resistant, and vancomycin intermediate S.
aureus; methicillin resistant S. epidermidis; and oxazolidinone
resistant S. aureus.
[0181] The compounds of the invention may be used to treat a
bacterial infection in mammals, specifically humans. Such
infections include, but are not limited to, ear infections,
sinusitis, upper and lower respiratory tract infections, genital
infections, skin and soft tissue infections, and bacterial
endocarditis. The compounds of the invention may also be used to
prevent a bacterial infection in mammals, specifically humans, such
as a bacterial infection that may result from medical or dental
procedures.
[0182] Suitably the compounds of the invention may be used to treat
ear infections.
[0183] Suitably the compounds of the invention may be used to treat
sinusitis.
[0184] Suitably the compounds of the invention may be used to treat
upper and lower respiratory tract infections.
[0185] Suitably the compounds of the invention may be used to treat
genital infections.
[0186] Suitably the compounds of the invention may be used to treat
skin and soft tissue infections.
[0187] Suitably the compounds of the invention may be used to treat
bacterial endocarditis.
[0188] The methods of treatment of the invention, specifically
methods for the treatment infectious diseases including bacterial
infections, comprise administering an effective amount of a
compound according to Formula I, or a pharmaceutically acceptable
salt thereof, to a patient in need thereof.
[0189] One embodiment of the present invention provides for a
method of treating a bacterial infection in humans comprising
administration of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide, or a pharmaceutically acceptable salt thereof, to a
human in need thereof.
[0190] Another embodiment of the present invention provides for a
method of treating a bacterial infection in humans comprising
administration of
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, to a human in need
thereof.
[0191] Another embodiment of the present invention provides for a
method of treating a bacterial infection in humans comprising
administration of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, to a human in need
thereof.
[0192] Another embodiment of the present invention provides for a
method of treating a bacterial infection in humans comprising
administration of
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4--
pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, to a human in need
thereof.
[0193] Another embodiment of the present invention provides for a
method of treating a bacterial infection in humans comprising
administration of
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-diaza-
spiro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide,
or a pharmaceutically acceptable salt thereof, to a human in need
thereof.
[0194] As used herein, "infectious disease" refers to any disease
characterized by the presence of a microbial infection, such as a
bacterial infection.
[0195] As used herein, "treat" in reference to a condition means:
(1) to ameliorate or prevent the condition or one or more of the
biological manifestations of the condition, (2) to interfere with
(a) one or more points in the biological cascade that leads to or
is responsible for the condition or (b) one or more of the
biological manifestations of the condition, (3) to alleviate one or
more of the symptoms or effects associated with the condition, or
(4) to slow the progression of the condition or one or more of the
biological manifestations of the condition.
[0196] As indicated above "treatment" of a condition includes
prevention of the condition. The skilled artisan will appreciate
that "prevention" is not an absolute term. In medicine,
"prevention" is understood to refer to the prophylactic
administration of a drug to substantially diminish the likelihood
or severity of a condition or biological manifestation thereof, or
to delay the onset of such condition or biological manifestation
thereof.
[0197] As used herein, "effective amount" in reference to a
compound of the invention means an amount of the compound
sufficient to treat the patient's condition, but low enough to
avoid serious side effects (at a reasonable benefit/risk ratio)
within the scope of sound medical judgment. An effective amount of
a compound will vary with the particular compound chosen (e.g.,
consider the potency, efficacy, and half-life of the compound); the
route of administration chosen; the condition being treated; the
severity of the condition being treated; the age, size, weight, and
physical condition of the patient being treated; the medical
history of the patient being treated; the duration of the
treatment; the nature of concurrent therapy; the desired
therapeutic effect; and like factors, and can be routinely
determined by the skilled artisan.
[0198] As used herein, "patient" refers to a human or other
mammal.
[0199] The compounds of the invention may be administered by any
suitable route of administration, including both systemic
administration and topical administration. Systemic administration
includes oral administration, parenteral administration,
transdermal administration, rectal administration, and
administration by inhalation. Parenteral administration refers to
routes of administration other than enteral, transdermal, or by
inhalation, and is typically by injection or infusion. Parenteral
administration includes intravenous, intramuscular, and
subcutaneous injection or infusion. Inhalation refers to
administration into the patient's lungs whether inhaled through the
mouth or through the nasal passages. Topical administration
includes application to the skin as well as intraocular,
intravaginal, and intranasal administration.
[0200] The compounds of the invention may be administered once or
according to a dosing regimen wherein a number of doses are
administered at varying intervals of time for a given period of
time. For example, doses may be administered one, two, three, or
four times per day. Doses may be administered until the desired
therapeutic effect is achieved or indefinitely to maintain the
desired therapeutic effect. Suitable dosing regimens for a compound
of the invention depend on the pharmacokinetic properties of that
compound, such as absorption, distribution, and half-life, which
can be determined by the skilled artisan. In addition, suitable
dosing regimens, including the duration such regimens are
administered, for a compound of the invention depend on the
condition being treated, the severity of the condition being
treated, the age and physical condition of the patient being
treated, the medical history of the patient being treated, the
nature of concurrent therapy, the desired therapeutic effect, and
like factors within the knowledge and expertise of the skilled
artisan. It will be further understood by such skilled artisans
that suitable dosing regimens may require adjustment given an
individual patient's response to the dosing regimen or over time as
individual patient needs change.
[0201] Typical daily dosages may vary depending upon the particular
route of administration chosen. Typical daily dosages for oral
administration, to a human weighing approximately 70 kg, would
range from 50 mg to 3 g, suitably 100 mg to 2 g of a compound of
the invention a day.
[0202] Additionally, the compounds of the invention may be
administered as prodrugs. As used herein, a "prodrug" of a compound
of the invention is a functional derivative of the compound which,
upon administration to a patient, eventually liberates the compound
of the invention in vivo. Administration of a compound of the
invention as a prodrug may enable the skilled artisan to do one or
more of the following: (a) modify the onset of the compound in
vivo; (b) modify the duration of action of the compound in vivo;
(C) modify the transportation or distribution of the compound in
vivo; (d) modify the solubility of the compound in vivo; and (e)
overcome a side effect or other difficulty encountered with the
compound. Typical functional derivatives used to prepare prodrugs
include modifications of the compound that are chemically or
enzymatically cleaved in vivo. Such modifications, which include
the preparation of phosphates, amides, esters, thioesters,
carbonates, and carbamates, are well known to those skilled in the
art.
[0203] The invention also provides a compound of the invention for
use in medical therapy, particularly in bacterial infections. Thus,
in a further aspect, the invention is directed to the use of a
compound according to Formula I or a pharmaceutically-acceptable
salt thereof in the preparation of a medicament for the treatment
of bacterial infections.
[0204] As stated above, compounds according to Formula I are PDF
inhibitors, and may be useful in the treatment of bacterial
infections. The biological activity of the compounds according to
Formula I can be determined using suitable assays such as those
measuring inhibition of the enzymatic activity of PDF and those
evaluating the ability of the compounds to inhibit bacterial growth
in vitro or in animal models of infection.
[0205] Certain Examples of the invention possess greater in vitro
antibacterial activity (MIC and/or MIC90) and/or better in vivo
efficacy over the examples from WO 03/101442. These Examples
include, but are not limited to, the following: [0206]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide; [0207]
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide;
[0208]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazin-
yl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamid-
e; [0209]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-
-7-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide; and [0210]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-diaza-
spiro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide.
PDF IC50 Assay
[0211] Enzymatic activity of PDF was measured using a formate
dehydrogenase (FDH)-coupled assay [Lazennec and Meinnel (1997)
Anal. Biochem. 244, 180-182]. Once formate is released from
methionine by PDF, it is oxidized by FDH thereby reducing one
molecule of NAD to NADH and resulting in an increase in absorbance
at 340 nm. Reactions were initiated by adding PDF to microtiter
plates containing all other reaction components and were
continuously monitored for 20 min at 25.degree. C. The final
reaction composition for the Staphylococcus aureus PDF (SaPDF)
assay was 50 mM potassium phosphate, pH 7.6, 5 units/mL FDH, 7 mM
NAD, 5% DMSO, 1 nM SaPDF, and 2.9 mM formyl-Met-Ala-Ser in 50 .mu.L
total volume. Serial dilutions of inhibitors were performed in
DMSO. Reagents and assay format were identical for Haemophilus
influenzae PDF except that formyl-Met-Ala-Ser was 6 mM final. In
the Streptococcus pneumoniae PDF assay, reaction conditions were
similar but contained 30 pM enzyme, 2 mM NAD and 4 mM
formyl-Met-Ala-Ser. The varying formyl-Met-Ala-Ser concentrations
reflect K.sub.M values for substrate using the different PDF
isozymes. IC.sub.50s were determined by fitting to the equation: %
Inhibition=100/1+(IC.sub.50/[I]).sup.s, where s is a slope factor,
I is the inhibitor concentration and the IC.sub.50 is the
concentration of compound that causes 50% inhibition.
Results
[0212] Examples 1-281 inhibit S. aureus, H. influenzae and S.
pneumoniae PDF activities with IC50s.ltoreq.100 nM.
Antimicrobial Activity Assay
[0213] Whole-cell antimicrobial activity was determined by broth
microdilution using the Clinical and Laboratory Standards Institute
(CLSI, formerly NCCLS) recommended methodology (NCCLS Document
M7-A6, "Methods for Dilution Susceptibility Tests for Bacteria that
Grow Aerobically Approved Standard Sixth Edition", 2003). Compounds
were tested in serial two-fold dilutions ranging from 64 to 0.06
.mu.g/mL. A panel of 12 strains was evaluated in the assay. This
panel consisted of the following laboratory strains: Staphylococcus
aureus Oxford, Staphylococcus aureus WCUH29, Enterococcus faecalis
I, Enterococcus faecalis 7, Haemophilus influenzae Q1, Haemophilus
influenzae NEMC1, Moraxella catarrhalis 1502, Streptococcus
pneumoniae 1629, Streptococcus pneumoniae N1387, Streptococcus
pneumoniae Ery2, Escherichia coli 7623 (AcrABEFD+) and Escherichia
coli 120 (AcrAB-). The minimum inhibitory concentration (MIC) was
determined as the lowest concentration of compound that inhibited
visible growth. A mirror reader was used to assist in determining
the MIC endpoint.
Results
[0214] Each of the Examples 1-281 have a minimal inhibitory
concentration (MIC).ltoreq.4 .mu.g/mL against at least one of the
organisms listed above. For at least one strain of every organism
listed above, at least one example had an MIC.ltoreq.4 .mu.g/mL,
with the exception of Enterococcus faecalis I, and Enterococcus
faecalis 7, for which most examples had MICs.gtoreq.16
.mu.g/mL.
[0215] Antimicrobial Activity data (MIC's in .mu.g/mL) for specific
Examples is given in Table 2.
TABLE-US-00002 TABLE 2 Example Example Example Example Example 24*
63* 109 172 275 Organism .mu.g/mL .mu.g/mL .mu.g/mL .mu.g/mL
.mu.g/mL S. aureus 2 1 2 1, 2 2, 4 Oxford S. aureus 0.375 0.5 0.5
0.5 0.5, 1 WCUH29 E. faecalis I 48 16 64, >64 16 32, 64 E.
faecalis 7 32 64 >64 8, 64 16, 64 H. influenzae 0.5 0.25 0.5 1,
2 0.5, 1 Q1 H. influenzae 1 0.5 1 1, 2 1 NEMC1 M. catarrhalis 0.375
0.125 0.25 .ltoreq.0.06, 0.25 1502 0.125 S. pneumoniae 0.75 0.5 0.5
0.5 1 1629 S. pneumoniae 0.5 0.25 0.25 0.125 0.5 N1387 S.
pneumoniae 0.375 0.25 0.25 0.125- 0.5 ERY2 0.25 E. coli 16 4 8 4,
16 4, 16 7623 AcrABEFD+ E. coli 120 0.1875 0.25 .ltoreq.0.06,
0.125- .ltoreq.0.06, AcrAB-- 0.125 0.5 0.5 Number of 6 13 2 2 2
times entire panel of 12 strains was run *MIC data is expressed as
the median of all results obtained
Animal Models of Infection
[0216] All procedures were performed in accordance with protocols
approved by the GSK Institutional Animal Care and Use Committee,
and meet or exceed the standards of the American Association for
the Accreditation of Laboratory Animal Care (AAALAC), the United
States Department of Health and Human Services and all local and
federal animal welfare laws.
Rat Respiratory Tract Infection (RTI) Model with H. Influenzae or
S. Pneumoniae.
[0217] In this model, anesthetized rats (male Sprague Dawley
[Cr1:CD (SD] 100 g) (Charles River) were infected by intrabronchial
instillation of 2-3.times.10.sup.6 bacterial CFU/rat in 100 .mu.L
of agar directly into the lungs [G. Smith (1991) Lab Animals vol
25, 46-49]. Animals (n=6 per group) were dosed with different
amounts of compound (2-fold dilution ranging from 37.5 to 300
mg/kg) by oral gavage twice daily for 4 days starting 1 h after
infection. Control animals were dosed with diluent on the same
schedule. The rats were euthanized 96 h post infection and the
lungs removed aseptically and homogenized in 1 mL of sterile saline
with a stomacher machine. Ten fold serial dilutions were done in
sterile saline to enumerate viable bacteria numbers. This rat lung
infection model has been shown to be able to predict human efficacy
in community-acquired pneumonia (CAP) caused by S. pneumoniae
[Hoover J. L., C. Mininger, R. Page, R. Straub, S. Rittenhouse, and
D. Payne. (2007). Abstract A-17. Proceedings of the 47th ICAAC,
Chicago, Ill.].
Murine Groin S. Aureus Abscess Model of Skin and Soft Tissue
Infection (SSTI).
[0218] In this model, anesthetized mice (male CD1, 20 g) (Charles
River) were infected with S. aureus in semi-solid agar
(1.times.10.sup.6 CFU/mouse) subcutaneously in the groin area
(Jarvest, R. L., Berge, J. M., Berry, V., Boyd, H. F., Brown, M.
J., Elder, J. S., Forrest, A. K., Fosberry, A. P., Gentry, D. R.,
Hibbs, M. J., Jaworski, D. D., O'Hanlon, P. J., Pope, A. J.,
Rittenhouse, S. Sheppard, R. J., Slater-Radosti, C. and Worby, A.
(2002) J. Med. Chem., 45, 1959-1962). The animals (n=6 per group)
were dosed with different amounts of compound (2-fold dilution
ranging from 37.5 to 300 mg/kg) by oral gavage twice daily starting
1 h after infection. Control animals were dosed with diluent on the
same schedule. Mice are euthanized 96 h post infection and the
abscesses are aseptically removed and homogenized. Ten fold serial
dilutions were done in sterile saline to enumerate viable bacteria
numbers.
Results
[0219] Some of the Examples described herein have demonstrated oral
efficacy in one or more of the above animal models of infection,
reducing the amount of bacteria recovered from lungs or abscesses,
with respect to the untreated control animals, by .gtoreq.3
log.sub.10 CFU/mL.
Compositions
[0220] The compounds of the invention will normally, but not
necessarily, be formulated into pharmaceutical compositions prior
to administration to a patient. Accordingly, in another aspect, the
invention is directed to pharmaceutical compositions comprising a
compound of the invention and one or more pharmaceutically
acceptable excipients.
[0221] The pharmaceutical compositions of the invention may be
prepared and packaged in bulk form wherein a safe and effective
amount of a compound of the invention can be extracted and then
given to the patient such as with powders or syrups. Alternatively,
the pharmaceutical compositions of the invention may be prepared
and packaged in unit dosage form wherein each physically discrete
unit contains a safe and effective amount of a compound of the
invention. When prepared in unit dosage form, the pharmaceutical
compositions of the invention typically contain from 25 mg to 1.5
g, suitably 100 to 500 mg, of compound of the invention.
[0222] The pharmaceutical compositions of the invention typically
contain one compound of the invention. However, in certain
embodiments, the pharmaceutical compositions of the invention may
contain more than one compound of the invention. For example, in
certain embodiments the pharmaceutical compositions of the
invention may contain two compounds of the invention. In addition,
the pharmaceutical compositions of the invention may optionally
further comprise one or more additional pharmaceutically active
compounds.
[0223] As used herein, "pharmaceutically acceptable excipient"
means a pharmaceutically acceptable material, composition or
vehicle that, for example, are involved in giving form or
consistency to the pharmaceutical composition. Each excipient must
be compatible with the other ingredients of the pharmaceutical
composition when commingled such that interactions which would
substantially reduce the efficacy of the compound of the invention
when administered to a patient and interactions which would result
in pharmaceutical compositions that are not pharmaceutically
acceptable are avoided. In addition, each excipient must of course
be of sufficiently high purity to render it
pharmaceutically-acceptable.
[0224] The compound of the invention and the pharmaceutically
acceptable excipient or excipients will typically be formulated
into a dosage form adapted for administration to the patient by the
desired route of administration. For example, dosage forms include
those adapted for (1) oral administration such as tablets,
capsules, caplets, pills, troches, powders, syrups, elixers,
suspensions, solutions, emulsions, sachets, and cachets; (2)
parenteral administration such as sterile solutions, suspensions,
and powders for reconstitution; (3) transdermal administration such
as transdermal patches; (4) rectal administration such as
suppositories; (5) inhalation such as dry powders, aerosols,
suspensions, and solutions; and (6) topical administration such as
creams, ointments, lotions, solutions, pastes, sprays, foams, and
gels.
[0225] Suitable pharmaceutically-acceptable excipients will vary
depending upon the particular dosage form chosen. In addition,
suitable pharmaceutically acceptable excipients may be chosen for a
particular function that they may serve in the composition. For
example, certain pharmaceutically-acceptable excipients may be
chosen for their ability to facilitate the production of uniform
dosage forms. Certain pharmaceutically acceptable excipients may be
chosen for their ability to facilitate the production of stable
dosage forms. Certain pharmaceutically-acceptable excipients may be
chosen for their ability to facilitate the carrying or transporting
of the compound or compounds of the invention once administered to
the patient from one organ, or portion of the body, to another
organ, or another portion of the body. Certain pharmaceutically
acceptable excipients may be chosen for their ability to enhance
patient compliance.
[0226] Suitable pharmaceutically acceptable excipients include the
following types of excipients: Diluents, fillers, binders,
disintegrants, lubricants, glidants, granulating agents, coating
agents, wetting agents, solvents, co-solvents, suspending agents,
emulsifiers, sweetners, flavoring agents, flavor masking agents,
coloring agents, anticaking agents, hemectants, chelating agents,
plasticizers, viscosity increasing agents, antioxidants,
preservatives, stabilizers, surfactants, and buffering agents. The
skilled artisan will appreciate that certain pharmaceutically
acceptable excipients may serve more than one function and may
serve alternative functions depending on how much of the excipient
is present in the formulation and what other ingredients are
present in the formulation.
[0227] Skilled artisans possess the knowledge and skill in the art
to enable them to select suitable pharmaceutically-acceptable
excipients in appropriate amounts for use in the invention. In
addition, there are a number of resources that are available to the
skilled artisan which describe pharmaceutically-acceptable
excipients and may be useful in selecting suitable
pharmaceutically-acceptable excipients. Examples include
Remington's Pharmaceutical Sciences (Mack Publishing Company), The
Handbook of Pharmaceutical Additives (Gower Publishing Limited),
and The Handbook of Pharmaceutical Excipients (the American
Pharmaceutical Association and the Pharmaceutical Press).
[0228] The pharmaceutical compositions of the invention are
prepared using techniques and methods known to those skilled in the
art. Some of the methods commonly used in the art are described in
Remington's Pharmaceutical Sciences (Mack Publishing Company).
[0229] In one aspect, the invention is directed to a solid oral
dosage form such as a tablet or capsule comprising a safe and
effective amount of a compound of the invention and a diluent or
filler. Suitable diluents and fillers include lactose, sucrose,
dextrose, mannitol, sorbitol, starch (e.g. corn starch, potato
starch, and pre-gelatinized starch), cellulose and its derivatives
(e.g. microcrystalline cellulose), calcium sulfate, and dibasic
calcium phosphate. The oral solid dosage form may further comprise
a binder. Suitable binders include starch (e.g. corn starch, potato
starch, and pre-gelatinized starch), gelatin, acacia, sodium
alginate, alginic acid, tragacanth, guar gum, povidone, and
cellulose and its derivatives (e.g. microcrystalline cellulose).
The oral solid dosage form may further comprise a disintegrant.
Suitable disintegrants include crospovidone, sodium starch
glycolate, croscarmelose, alginic acid, and sodium carboxymethyl
cellulose. The oral solid dosage form may further comprise a
lubricant. Suitable lubricants include stearic acid, magnesium
stearate, calcium stearate, and talc.
[0230] Where appropriate, dosage unit formulations for oral
administration can be microencapsulated. The composition can also
be prepared to prolong or sustain the release as for example by
coating or embedding particulate material in polymers, wax or the
like.
[0231] The compounds of the invention may also be coupled with
soluble polymers as targetable drug carriers. Such polymers can
include polyvinylpyrrolidone, pyran copolymer,
polyhydroxypropylmethacrylamide-phenol,
polyhydroxyethylaspartamidephenol, or polyethyleneoxidepolylysine
substituted with palmitoyl residues. Furthermore, the compounds of
the invention may be coupled to a class of biodegradable polymers
useful in achieving controlled release of a drug, for example,
polylactic acid, polepsilon caprolactone, polyhydroxy butyric acid,
polyorthoesters, polyacetals, polydihydropyrans, polycyanoacrylates
and cross-linked or amphipathic block copolymers of hydrogels.
[0232] In another aspect, the invention is directed to a liquid
oral dosage form. Oral liquids such as solution, syrups and elixirs
can be prepared in dosage unit form so that a given quantity
contains a predetermined amount of a compound of the invention.
Syrups can be prepared by dissolving the compound of the invention
in a suitably flavored aqueous solution, while elixirs are prepared
through the use of a non-toxic alcoholic vehicle. Suspensions can
be formulated by dispersing the compound of the invention in a
non-toxic vehicle. Solubilizers and emulsifiers such as ethoxylated
isostearyl alcohols and polyoxy ethylene sorbitol ethers,
preservatives, flavor additive such as peppermint oil or natural
sweeteners or saccharin or other artificial sweeteners, and the
like can also be added.
[0233] In another aspect, the invention is directed to parenteral
administration. Pharmaceutical compositions adapted for parenteral
administration include aqueous and non-aqueous sterile injection
solutions which may contain anti-oxidants, buffers, bacteriostats
and solutes which render the formulation isotonic with the blood of
the intended recipient; and aqueous and non-aqueous sterile
suspensions which may include suspending agents and thickening
agents. The compositions may be presented in unit-dose or
multi-dose containers, for example sealed ampoules and vials, and
may be stored in a freeze-dried (lyophilized) condition requiring
only the addition of the sterile liquid carrier, for example water
for injections, immediately prior to use. Extemporaneous injection
solutions and suspensions may be prepared from sterile powders,
granules and tablets.
[0234] In another aspect, the invention is directed to a
pharmaceutical composition comprising
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide, or a pharmaceutically acceptable salt thereof, and a
pharmaceutically acceptable excipient. Suitably
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide, or a pharmaceutically acceptable salt thereof, may
be formulated for oral administration, suitably in a liquid or
tablet form, or for patenteral administration.
[0235] In another aspect, the invention is directed to a
pharmaceutical composition comprising
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, and a
pharmaceutically acceptable excipient. Suitably
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, may be formulated
for oral administration, suitably in a liquid or tablet form, or
for patenteral administration.
[0236] In another aspect, the invention is directed to a
pharmaceutical composition comprising
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, and a
pharmaceutically acceptable excipient. Suitably
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, may be formulated
for oral administration, suitably in a liquid or tablet form, or
for patenteral administration.
[0237] In another aspect, the invention is directed to a
pharmaceutical composition comprising
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4--
pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, and a
pharmaceutically acceptable excipient. Suitably
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4--
pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide,
or a pharmaceutically acceptable salt thereof, may be formulated
for oral administration, suitably in a liquid or tablet form, or
for patenteral administration.
[0238] In another aspect, the invention is directed to a
pharmaceutical composition comprising
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-diaza-
spiro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide,
or a pharmaceutically acceptable salt thereof, and a
pharmaceutically acceptable excipient Suitably
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-diaza-
spiro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide,
or a pharmaceutically acceptable salt thereof, may be formulated
for oral administration, suitably in a liquid or tablet form, or
for patenteral administration.
Polymorphic Forms
[0239] There have been found to be 3 characterized and reproducible
polymorphic solid state forms of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide. These three forms are Form 1, Form 2, and Form
3.
[0240] Form 1 is a crystalline form which may be produced from a
slurry of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide in ethers, acetates, ketones, longer chain alcohols,
and other solvent systems (for example, nitromethane, acetonitrile,
2-butanone, methyl acetate, ethyl acetate, diethyl ether, heptane,
dimethyl carbonate, t-butyl ethyl ether, 1-methoxy-2-propanol,
2-methoxyethyl ether, chloroform, chlorobenzene, tetrahydrofuran,
toluene, cyclohexane, and cyclohexanone).
[0241] A solvated form has been analytically observed for
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide in ethyl acetate. Desolvation of the ethyl acetate
solvate may be accomplished by vacuum filtration, and results in
Form 1.
[0242] Form 2 is a crystalline form which may be produced from a
slurry of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide in water.
[0243] Form 3 is a crystalline form which may be produced from a
slurry of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide in neat, small alcohol solvent systems, such as
methanol, 1-propanol, and 1-butanol. These alcohols must contain
little to no water content to avoid production of Form 2, although
the exact water content threshold has not been established. Heating
Form 1 to above 132.degree. C. (but not greater than
.about.185.degree. C. which would lead to decomposition of the
compound) causes an exothermic solid state form conversion of Form
1 to Form 3.
[0244] The invention provides
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide Form 1, Form 2, or Form 3 in substantially pure form.
The invention further provides for mixtures of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide which comprise two or more of Form 1, Form 2, and
Form 3. In one embodiment the mixture may include both Form 1 and
Form 2. The composition may comprise from 1, 2, 3, 4, 5, 10, 15,
20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 75, 80, 85, 90, 95, 97 or
greater than about 99 percent of either Form 1 or Form 2. In
another embodiment the mixture may comprise both Form 2 and Form 3.
The composition may comprise from 1, 2, 3, 4, 5, 10, 15, 20, 25,
30, 35, 40, 45, 50, 55, 60, 70, 75, 80, 85, 90, 95, 97 or greater
than about 99 percent of either Form 2 or Form 3. In another
embodiment the mixture may comprise both Form 1 and Form 3. In
another embodiment the mixture may comprise 1, 2, 3, 4, 5, 10, 15,
20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 75, 80, 85, 90, 95, 97 or
greater than about 99 percent of either Form 1 or Form 3.
[0245] In one embodiment of the invention a composition may
comprise from 1, 2, 3, 4, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50,
55, 60, 70, 75, 80, 85, 90, 95, 97 or greater than about 99 percent
of an individual polymorphic form, be it Form 1, Form 2, or Form
3.
[0246] Another embodiment of the invention is the polymorph Form 1,
Form 2, or Form 3 in substantially pure crystalline form.
[0247] As is known, the crystalline state of a compound can be
described by several crystallographic parameters: unit cell
dimensions, space groups, and atomic position of the atoms in the
compound relative to the origin of its unit cell. These parameters
are experimentally determined by crystal x-ray analysis. It is
possible for a compound to form more than one type of crystal.
These different crystalline forms are called polymorphs.
[0248] Form 1, Form 2, and Form 3 may be differentiated by X-Ray
powder diffraction (XRPD) of the solid state forms, as shown herein
in FIGS. 6 to 8 for Forms 1 to 3 respectively. FT-IR, FT-Raman,
Differential Scanning calorimetry (DSC), and Thermogravimetric
Analysis (TGA) data may also be used to assist in differentiation
of the solid state forms as are shown and described herein.
[0249] Characteristic powder X-ray diffraction pattern peak
positions are reported for polymorphs in terms of the angular
positions (two theta) with an allowable variability, generally of
about 0.1+/-.degree. 2-theta. The entire pattern, or most of the
pattern peaks may also shift by about 0.1+/-.degree. due to
difference in calibration, setting, and other variations from
instrument to instrument and from operator to operator.
[0250] The XRPD data described herein was acquired on a Bruker AXS
PXRD General Area Detector Diffraction system using methods as
described herein. Characteristic XRPD angles and d-spacings are
recorded in Table 1 below.
[0251] Polymorphic Form 1 may therefore be characterized by any
one, any two, any three, any four, or any five or more of the
2-theta angle peaks.
[0252] Polymorphic Form 2 may therefore be characterized by any
one, any two, any three, any four, or any five or more of the
2-theta angle peaks.
[0253] Polymorphic Form 3 may therefore be characterized by any
one, any two, any three, any four, or any five or more of the
2-theta angle peaks.
[0254] Similar characterizations of any one, any two, any three,
any four, or any five or more may also be attributed to the
d-spacing/angstroms as shown in Table 1 below.
TABLE-US-00003 TABLE 1 Form 1 Form 2 Form 3 d-spacing/ d-spacing/
d-spacing/ 2.theta. .ANG. 2.theta. .ANG. 2.theta. .ANG. 4.1 21.8
7.8 11.3 6.1 14.5 6.1 14.5 9.5 9.3 7.5 11.7 6.9 12.8 12.3 7.2 8.2
10.8 8.1 10.9 13.2 6.7 9.1 9.7 9.5 9.3 15.6 5.7 12.0 7.4 11.2 7.9
18.3 4.8 12.8 6.9 12.9 6.9 19.0 4.7 13.4 6.6 13.8 6.4 20.6 4.3 16.0
5.6 15.6 5.7 21.4 4.1 23.3 3.8 18.3 4.8 26.7 3.3 27.6 3.2
[0255] The FT-IR spectrum of the solid forms was recorded using a
Thermo Magna MidIR system using methods as described herein. Slight
variations in observed peaks are expected based on the specific
spectrometer employed and the analyst's sample preparation
technique. Some margin of error is present in each of the peak
assignments reported below. The margin of error in the peak
assignments is approximately +/-1 cm.sup.-1.
[0256] Form 1 IR peaks were observed at: 1035+/-1 cm.sup.-1,
1059+/-1 cm.sup.-1, 1114+/-1 cm.sup.-1, 1155+/-1 cm.sup.-1,
1173+/-1 cm.sup.-1, 1347+/-1 cm.sup.-1, 1416+/-1 cm.sup.-1,
1443+/-1 cm.sup.-1, 1603+/-1 cm.sup.-1, and 1656+/-1 cm.sup.-1.
Suitably, Form 1 exhibits these characteristic peaks of any one,
any two, any three, any four, or any five or more peaks.
[0257] Form 2 IR peaks were observed at: 1036+/-1 cm.sup.-1,
1114+/-1 cm.sup.-1, 1152+/-1 cm.sup.-1, 1172+/-1 cm.sup.-1,
1310+/-1 cm.sup.-1, 1414+/-1 cm.sup.-1, 1441+/-1 cm.sup.-1,
1570+/-1 cm.sup.-1, 1601+/-1 cm.sup.-1, and 1662+/-1 cm.sup.-1.
Suitably, Form 2 exhibits these characteristic peaks of any one,
any two, any three, any four, or any five or more peaks.
[0258] The IR data for Forms 1 and 2 are illustrated in FIGS. 1 and
2 respectively.
[0259] The FT-Raman spectrum of the solid forms was recorded using
a Thermo FT-Raman System 960 Spectrometer using methods as
described herein. Slight variations in observed peaks are expected
based on the specific spectrometer employed and the analyst's
sample preparation technique. Some margin of error is present in
each of the peak assignments reported below. The margin of error in
the peak assignments is approximately +/-1 cm.sup.-1.
[0260] Form 1 Raman peaks were observed at: 506+/-1 cm.sup.-1,
760+/-1 cm.sup.-1, 796+/-1 cm.sup.-1, 884+/-1 cm.sup.-1, 1180+/-1
cm.sup.-1, 1305+/-1 cm.sup.-1, 1449+/-1 cm.sup.-1, 1606+/-1
cm.sup.-1, 1674+/-1 cm.sup.-1, and 2935+/-1 cm.sup.-1. Suitably,
Form 1 exhibits these characteristic peaks of any one, any two, any
three, any four, or any five or more peaks.
[0261] Form 2 Raman peaks were observed at: 273+/-1 cm.sup.-1,
483+/-1 cm.sup.-1, 507+/-1 cm.sup.-1, 764+/-1 cm.sup.-1, 847+/-1
cm.sup.-1, 1179+/-1 cm.sup.-1, 1228+/-1 cm.sup.-1, 1446+/-1
cm.sup.-1, 1673+/-1 cm.sup.-1, and 2932+/-1 cm.sup.-1. Suitably,
Form 2 exhibits these characteristic peaks of any one, any two, any
three, any four, or any five or more peaks.
[0262] Form 3 Raman peaks were observed at: 273+/-1 cm.sup.-1,
506+/-1 cm.sup.-1, 766+/-1 cm.sup.-1, 797+/-1 cm.sup.-1, 1176+/-1
cm.sup.-1, 1228+/-1 cm.sup.-1, 1302+/-1 cm.sup.-1, 1446+/-1
cm.sup.-1, 1672+/-1 cm.sup.-1, and 2934+/-1 cm.sup.-1. Suitably,
Form 3 exhibits these characteristic peaks of any one, any two, any
three, any four, or any five or more peaks.
[0263] The Raman data for Forms 1 to 3 are illustrated in FIGS. 3
to 5 respectively.
[0264] The DSC thermogram of the forms was obtained using a TA
Instruments Thermal Analysis System, Model DSC Q100 using methods
as described herein. The data are illustrated herein as FIGS. 9 to
11 for Forms 1 to 3 respectively.
[0265] Forms 1, 2, and 3 had a melt onset measured by DSC at
approximately 187.degree. C., 185.degree. C., and 190.degree. C.
respectively. With respect to Form 1 (FIG. 9) there was a melt at
132.degree. C. which corresponds to exothermic solid state form
conversion of Form 1 to Form 3.
[0266] The TGA trace of the forms was obtained using a TA
Instruments Thermal Analysis System, Model TGA Q500 using methods
described herein. The data are illustrated herein as FIGS. 12-14
for Forms 1 to 3 respectively.
[0267] One embodiment of the present invention is the polymorphic
form, Form 1, substantially as shown in the X-ray diffraction
pattern of FIG. 6, the FT-IR spectrum of FIG. 1, the FT-Raman
spectrum of FIG. 3, the DSC thermogram of FIG. 9, and the TGA trace
of FIG. 12.
[0268] Another embodiment of the present invention is the polymorph
Form 1 characterized by an X-ray diffraction pattern comprising
peaks expressed in terms of two theta angles wherein the x-ray
diffraction pattern comprises peaks at 4.1+/-0.1.degree.,
6.1+/-0.1.degree., 6.9+/-0.1.degree., 8.1+/-0.1.degree.,
9.5+/-0.1.degree., 11.2+/-0.1.degree., 12.9+/-0.1.degree.,
13.8+/-0.1.degree., 15.6+/-0.1.degree., and 18.3+/-0.1.degree..
Suitably Form 1 is characterized by an X-ray diffraction pattern
comprising of peaks at 8.1+/-0.1.degree., 9.5+/-0.1.degree.,
11.2+/-0.1.degree., 12.9+/-0.1.degree., 13.8+/-0.1.degree., and
15.6+/-0.1.degree..
[0269] Another embodiment of the present invention is the
polymorphic form, Form 1, of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide wherein said polymorphic form is characterized by an
X-ray diffraction pattern comprising peaks expressed in terms of 2
theta angles, wherein: [0270] a. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree.; or [0271] b. said X-ray
diffraction pattern comprises a peak at 4.1+/-0.1.degree. and
6.1+/-0.1.degree.; or [0272] c. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree., 6.1+/-0.1.degree., and
6.9+/-0.1.degree.; or [0273] d. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree., 6.1+/-0.1.degree.,
6.9+/-0.1.degree., and 8.1+/-0.1.degree.; or [0274] e. said X-ray
diffraction pattern comprises a peak at 4.1+/-0.1.degree.,
6.1+/-0.1.degree., 6.9+/-0.1.degree., 8.1+/-0.1.degree., and
9.5+/-0.1.degree.; or [0275] f. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree., 6.1+/-0.1.degree.,
6.9+/-0.1.degree., 8.1+/-0.1.degree., 9.5+/-0.1.degree., and
11.2+/-0.1.degree.; or [0276] g. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree., 6.1+/-0.1.degree.,
6.9+/-0.1.degree., 8.1+/-0.1.degree., 9.5+/-0.1.degree.,
11.2+/-0.1.degree., and 12.9+/-0.1.degree.; or [0277] h. said X-ray
diffraction pattern comprises a peak at 4.1+/-0.1.degree.,
6.1+/-0.1.degree., 6.9+/-0.1.degree., 8.1+/-0.1.degree.,
9.5+/-0.1.degree., 11.2+/-0.1.degree., 12.9+/-0.1.degree., and
13.8+/-0.1.degree.; or [0278] i. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree., 6.1+/-0.1.degree.,
6.9+/-0.1.degree., 8.1+/-0.1.degree., 9.5+/-0.1.degree.,
11.2+/-0.1.degree., 12.9+/-0.1.degree., 13.8+/-0.1.degree., and
15.6+/-0.1.degree.; or [0279] j. said X-ray diffraction pattern
comprises a peak at 4.1+/-0.1.degree., 6.1+/-0.1.degree.,
6.9+/-0.1.degree., 8.1+/-0.1.degree., 9.5+/-0.1.degree.,
11.2+/-0.1.degree., 12.9+/-0.1.degree., 13.8+/-0.1.degree.,
15.6+/-0.1.degree., and 18.3+/-0.1.degree..
[0280] Another embodiment of the present invention is a
pharmaceutical composition comprising Form 1 and a pharmaceutically
acceptable excipient.
[0281] Another embodiment of the present invention is the
polymorphic form, Form 2, substantially as shown in the X-ray
diffraction pattern of FIG. 7, the FT-IR spectrum of FIG. 2, the
FT-Raman spectrum of FIG. 4, the DSC thermogram of FIG. 10, and the
TGA trace of FIG. 13.
[0282] Another embodiment of the present invention is the polymorph
Form 2 characterized by an X-ray diffraction pattern comprising
peaks expressed in terms of two theta angles wherein the x-ray
diffraction pattern comprises peaks at 7.8+/-0.1.degree.,
9.5+/-0.1.degree., 12.3+/-0.1.degree., 13.2+/-0.1.degree.,
15.6+/-0.1.degree., 18.3+/-0.1.degree., 19.0+/-0.1.degree.,
20.6+/-0.1.degree., 21.4+/-0.1.degree., and 26.7+/-0.1.degree..
Suitably Form 2 is characterized by an X-ray diffraction pattern
comprising of peaks at 7.8+/-0.1.degree., 9.5+/-0.1.degree.,
12.3+/-0.1.degree., 13.2+/-0.1.degree., 15.6+/-0.1.degree.,
18.3+/-0.1.degree., and 19.0+/-0.1.degree..
[0283] Another embodiment of the present invention is the
polymorphic form, Form 2, of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide wherein said polymorphic form is characterized by an
X-ray diffraction pattern comprising peaks expressed in terms of 2
theta angles, wherein: [0284] a. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree.; or [0285] b. said X-ray
diffraction pattern comprises a peak at 7.8+/-0.1.degree. and
9.5+/-0.1.degree.; or [0286] c. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree., 9.5+/-0.1.degree., and
12.3+/-0.1.degree.; or [0287] d. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree., 9.5+/-0.1.degree.,
12.3+/-0.1.degree., and 13.2+/-0.1.degree.; or [0288] e. said X-ray
diffraction pattern comprises a peak at 7.8+/-0.1.degree.,
9.5+/-0.1.degree., 12.3+/-0.1.degree., 13.2+/-0.1.degree., and
15.6+/-0.1.degree.; or [0289] f. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree., 9.5+/-0.1.degree.,
12.3+/-0.1.degree., 13.2+/-0.1.degree., 15.6+/-0.1.degree., and
18.3+/-0.1.degree.; or [0290] g. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree., 9.5+/-0.1.degree.,
12.3+/-0.1.degree., 13.2+/-0.1.degree., 15.6+/-0.1.degree.,
18.3+/-0.1.degree., and 19.0+/-0.1.degree.; or [0291] h. said X-ray
diffraction pattern comprises a peak at 7.8+/-0.1.degree.,
9.5+/-0.1.degree., 12.3+/-0.1.degree., 13.2+/-0.1.degree.,
15.6+/-0.1.degree., 18.3+/-0.1.degree., 19.0+/-0.1.degree., and
20.6+/-0.1.degree.; or [0292] i. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree., 9.5+/-0.1.degree.,
12.3+/-0.1.degree., 13.2+/-0.1.degree., 15.6+/-0.1.degree.,
18.3+/-0.1.degree., 19.0+/-0.1.degree., 20.6+/-0.1.degree., and
21.4+/-0.1.degree.; or [0293] j. said X-ray diffraction pattern
comprises a peak at 7.8+/-0.1.degree., 9.5+/-0.1.degree.,
12.3+/-0.1.degree., 13.2+/-0.1.degree., 15.6+/-0.1.degree.,
18.3+/-0.1.degree., 19.0+/-0.1.degree., 20.6+/-0.1.degree.,
21.4+/-0.1.degree., and 26.7+/-0.1.degree..
[0294] Another embodiment of the present invention is a
pharmaceutical composition comprising Form 2 and a pharmaceutically
acceptable excipient.
[0295] Another embodiment of the present invention is the
polymorphic form, Form 3, substantially as shown in the X-ray
diffraction pattern of FIG. 8, the FT-Raman spectrum of FIG. 5, the
DSC thermogram of FIG. 11, and the TGA trace of FIG. 14.
[0296] Another embodiment of the present invention is the polymorph
Form 3 characterized by an X-ray diffraction pattern comprising
peaks expressed in terms of two theta angles wherein the x-ray
diffraction pattern comprises peaks at 6.1+/-0.1.degree.,
7.5+/-0.1.degree., 8.2+/-0.1.degree., 9.1+/-0.1.degree.,
12.0+/-0.1.degree., 12.8+/-0.1.degree., 13.4+/-0.1.degree.,
16.0+/-0.1.degree., 23.3+/-0.1.degree., and 27.6+/-0.1.degree..
Suitably Form 3 is characterized by an X-ray diffraction pattern
comprising of peaks at 7.5+/-0.1.degree., 8.2+/-0.1.degree.,
9.1+/-0.1.degree., 12.8+/-0.1.degree., 13.4+/-0.1.degree., and
16.0+/-0.1.degree..
[0297] Another embodiment of the present invention is the
polymorphic form, Form 3, of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide wherein said polymorphic form is characterized by an
X-ray diffraction pattern comprising peaks expressed in terms of 2
theta angles, wherein: [0298] a. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree.; or [0299] b. said X-ray
diffraction pattern comprises a peak at 6.1+/-0.1.degree. and
7.5+/-0.1.degree.; or [0300] c. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree., 7.5+/-0.1.degree., and
8.2+/-0.1.degree.; or [0301] d. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree., 7.5+/-0.1.degree.,
8.2+/-0.1.degree., and 9.1+/-0.1.degree.; or [0302] e. said X-ray
diffraction pattern comprises a peak at 6.1+/-0.1.degree.,
7.5+/-0.1.degree., 8.2+/-0.1.degree., 9.1+/-0.1.degree., and
12.0+/-0.1.degree.; or [0303] f. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree., 7.5+/-0.1.degree.,
8.2+/-0.1.degree., 9.1+/-0.1.degree., 12.0+/-0.1.degree., and
12.8+/-0.1.degree.; or [0304] g. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree., 7.5+/-0.1.degree.,
8.2+/-0.1.degree., 9.1+/-0.1.degree., 12.0+/-0.1.degree.,
12.8+/-0.1.degree., and 13.4+/-0.1.degree.; or [0305] h. said X-ray
diffraction pattern comprises a peak at 6.1+/-0.1.degree.,
7.5+/-0.1.degree., 8.2+/-0.1.degree., 9.1+/-0.1.degree.,
12.0+/-0.1.degree., 12.8+/-0.1.degree., 13.4+/-0.1.degree., and
16.0+/-0.1.degree.; or [0306] i. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree., 7.5+/-0.1.degree.,
8.2+/-0.1.degree., 9.1+/-0.1.degree., 12.0+/-0.1.degree.,
12.8+/-0.1.degree., 13.4+/-0.1.degree., 16.0+/-0.1.degree., and
23.3+/-0.1.degree.; or [0307] j. said X-ray diffraction pattern
comprises a peak at 6.1+/-0.1.degree., 7.5+/-0.1.degree.,
8.2+/-0.1.degree., 9.1+/-0.1.degree., 12.0+/-0.1.degree.,
12.8+/-0.1.degree., 13.4+/-0.1.degree., 16.0+/-0.1.degree.,
23.3+/-0.1.degree., and 27.6+/-0.1.degree..
[0308] Another embodiment of the present invention is a
pharmaceutical composition comprising Form 3 and a pharmaceutically
acceptable excipient.
EXAMPLES
[0309] The following examples illustrate the invention. These
examples are not intended to limit the scope of the present
invention, but rather to provide guidance to the skilled artisan to
prepare and use the compounds, compositions, and methods of the
present invention. While particular embodiments of the present
invention are described, the skilled artisan will appreciate that
various changes and modifications can be made without departing
from the spirit and scope of the invention.
[0310] As used herein the symbols and conventions used in these
processes, schemes and examples are consistent with those used in
the contemporary scientific literature, for example, the Journal of
the American Chemical Society or the Journal of Biological
Chemistry. Standard single-letter or three-letter abbreviations are
generally used to designate amino acid residues, which are assumed
to be in the L-configuration unless otherwise noted. Unless
otherwise noted, all starting materials were obtained from
commercial suppliers and used without further purification.
[0311] All references to ether are to diethyl ether; brine refers
to a saturated aqueous solution of NaCl. Unless otherwise
indicated, all temperatures are expressed in .degree. C. (degrees
Centigrade). All reactions are conducted under an inert atmosphere
at room temperature unless otherwise noted, and all solvents are
highest available purity unless otherwise indicated.
[0312] .sup.1H NMR (hereinafter also "NMR") spectra were recorded
on a Varian VXR-300, a Varian Unity-300, a Varian Unity-400
instrument, a Brucker AVANCE-400, a General Electric QE-300 or a
Bruker AM 400 spectrometer. Chemical shifts are expressed in parts
per million (ppm, .delta. units). Coupling constants are in units
of hertz (Hz). Splitting patterns describe apparent multiplicities
and are designated as s (singlet), d (doublet), t (triplet), q
(quartet), quint (quintet), m (multiplet), br (broad).
[0313] Mass spectra were run on an open access LC-MS system using
electrospray ionization. LC conditions: 10% to 80% CH.sub.3CN
(0.018% TFA) in 3.0 min with a 1.25 min hold and 0.5 min
re-equilibration; detection by MS, UV at 214 nm, and a light
scattering detector (ELS). Column: 2.1.times.50 mm Zorbax
SB-C8.
[0314] For preparative (prep) HPLC; ca. 100 mg of the final
products were injected in 1000 .mu.L of MeOH, DMSO, or DMF onto a
SunFire Prep C18 OBD 5 um 30.times.75 mm column at 35 mL/min with a
10 min gradient from 5% CH.sub.3CN to 95% CH.sub.3CN in H.sub.2O,
followed by a 90% CH.sub.3CN in H.sub.2O hold for 1.9 min. Flash
chromatography was run over Merck Silica gel 60 (230-400 mesh), or
using a Teledyne Isco Combiflash Companion with normal phase,
disposable Redi-Sep flash columns.
Intermediate A
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid
##STR00014##
[0315] Part A
(4S)--Benzyl-3-(3-cyclopentylpropanoyl)oxazolidin-2-one
[0316] To a solution of (S)-(-)-4-benzyl-2-oxazolidinone (25 g, 141
mmol) in THF (350 mL) at -78.degree. C. was added dropwise n-BuLi
(56.4 mL, 2.5M solution in hexane, 141 mmol). After stirring for 60
min at the same temperature, the reaction mixture was then treated
with 3-cyclopentylpropionyl chloride (21.6 mL, 141 mmol) over 0.25
h. The reaction mixture was allowed to warm to room temperature and
stirred overnight. The reaction was quenched with saturated aqueous
NH.sub.4Cl solution (320 mL). The aqueous layer was extracted with
EtOAc (3.times.200 mL). The combined organic layers were dried
(MgSO.sub.4) and evaporated to yield
(4S)-benzyl-3-(3-cyclopentylpropanoyl)oxazolidin-2-one as a white
solid (42.4 g, 100%). LCMS: (M+H).sup.+: 302.3.
Part B
(4S)-34(2R)-3-Cyclopentyl-2-{[(phenylmethyl)oxy]methyl}propanoyl)-4-(pheny-
l methyl)-1,3-oxazolidin-2-one
[0317] To a solution of
(4S)-benzyl-3-(3-cyclopentylpropanoyl)oxazolidin-2-one (42.4 g, 141
mmol) in dichloromethane (500 mL) at 0.degree. C. under nitrogen
was added titanium (IV) chloride (1 M in DCM, 155 mL, 155 mmol) in
a slow steady stream. After 5 min, diisopropylethylamine (27 mL,
155 mmol) was added dropwise. After stirring at 0.degree. C. for 1
h, benzyloxymethylchloride (TCI-America) (39 mL, 280 mmol) was
added in a slow steady stream to the resulting titanium enolate,
and the mixture was maintained at 0.degree. C. for 3.5 h. The
reaction mixture was then quenched with water (400 mL). The aqueous
layer was extracted with dichloromethane (150 mL.times.2). The
organic extracts were washed with saturated NaHCO.sub.3, were dried
(MgSO.sub.4) and were evaporated. The residue was washed with ether
(2.times.), and then was triturated with hexanes/ether to provide 2
crops of
(4S)-3-((2R)-3-cyclopentyl-2-{[(phenylmethyl)oxy]methyl}propanoyl)-4-(-
phenylmethyl)-1,3-oxazolidin-2-one as a pale yellow solid (42.7 g,
72%). LCMS: (M+H).sup.+: 422.2.
Part C
(4S)-3-[(2R)-3-Cyclopentyl-2-(hydroxymethyl)propanoyl]-4-(phenylmethyl)-1,-
3-oxazolidin-2-one
[0318] A solution of
(4S)-3-((2R)-3-cyclopentyl-2-{[(phenylmethyl)oxy]methyl}propanoyl)-4-(phe-
nylmethyl)-1,3-oxazolidin-2-one (42.7 g, 0.1 mol) in ethanol (800
mL) and DMF (180 mL) was subjected to catalytic hydrogenation using
10% Pd/C (4 g) and a balloon of hydrogen. The reaction was 50%
complete by LCMS after 24 h. The reaction was purged with nitrogen
and a fresh balloon of hydrogen was introduced. After an additional
60 h, the reaction was again purged with nitrogen, was filtered,
and the filtrate solvents were removed to provide
(4S)-3-[(2R)-3-cyclopentyl-2-(hydroxymethyl)propanoyl]-4-(phenylmethyl)-1-
,3-oxazolidin-2-one (33.1 g, 100%). LCMS: (M+H).sup.+: 332.3.
Part D
(2R)-3-Cyclopentyl-2-(hydroxymethyl)propanoic acid
[0319]
(4S)-3-[(2R)-3-Cyclopentyl-2-(hydroxymethyl)propanoyl]-4-(phenylmet-
hyl)-1,3-oxazolidin-2-one (33.1 g, 0.1 mol) was stirred in a
mixture of THF (330 mL) and water (55 mL) and cooled to 0.degree.
C. 30% Hydrogen peroxide (96 mL, 1 mol) was added, followed by
lithium hydroxide monohydrate (8.4 g, 0.2 mol). The reaction was
warmed to room temperature, and then stirred overnight. The THF was
removed by rotary evaporation. The aqueous residue was washed with
dichloromethane (3.times.100 mL), was acidified with 6N HCl, and
was extracted with ethyl acetate (4.times.100 mL). The organic
extracts were dried (MgSO.sub.4) and were evaporated to provide
(2R)-3-cyclopentyl-2-(hydroxymethyl)propanoic acid as a clear,
colorless oil (18.5 g, >100%). LCMS: (M+H).sup.+: not detected.
.sup.1H NMR (400 MHz, CDCl.sub.3): .delta. 7.3 (br s, 1H), 3.79 (d,
J=5.83 Hz, 2H), 2.64-2.71 (m, 1H), 1.45-1.87 (m, 9H), 1.05-0.14 (m,
2H).
Part E
(2R)-3-Cyclopentyl-2-(hydroxymethyl)-N-[(phenylmethyl)oxy]propanamide
[0320] To a mixture of
(2R)-3-cyclopentyl-2-(hydroxymethyl)propanoic acid (18.3 g, 106
mmol), O-benzyl hydroxyamine hydrochloride (18.62 g, 117 mmol) and
4-(dimethylamino)pyridine (28.5 g, 233 mmol) in dichloromethane
(110 mL) at 0.degree. C. was added
1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (22.3
g, 117 mmol). The mixture was maintained at 0.degree. C. for 3 h.
After this time, 500 mL of 1N cold, aqueous HCl solution was added,
and the mixture was stirred for another 30 min. The resulting white
solid precipitate was collected by filtration. The precipitate was
washed with 1N HCl, with water, and with cold DCM. Drying overnight
in a vacuum dessicator provided
(2R)-3-cyclopentyl-2-(hydroxymethyl)-N-[(phenylmethyl)oxy]propan-
amide (19.1 g, 65%). LCMS: (M+H).sup.+: 278.1.
Part F
(3R)-3-(Cyclopentyl methyl)-1-[(phenylmethyl)oxy]-2-azetidinone
[0321] To a mixture of
(2R)-3-cyclopentyl-2-(hydroxymethyl)-N-[(phenylmethyl)oxy]propanamide
(22.5 g, 81 mmol) and triphenylphosphine (22.5 g, 97 mmol) in THF
(800 mL) at 0.degree. C. was added dropwise diisopropyl
azodicarboxylate (18.9 mL, 97 mmol). The reaction mixture was
maintained at 0.degree. C. for 45 min and was then evaporated.
Purification by chromatography on silica gel using an eluting
system of hexane/EtOAc (95:5) provided
(3R)-3-(cyclopentylmethyl)-1-[(phenylmethyl)oxy]-2-azetidinone
(16.9 g, 81%). LCMS: (M+H).sup.+: 260.1.
Part G
(2R)-3-Cyclopentyl-2-({[(phenylmethyl)oxy]amino}methyl)propanoic
acid
[0322] A mixture of
(3R)-3-(cyclopentylmethyl)-1-[(phenylmethyl)oxy]-2-azetidinone (20
g, 77.1 mmol) and LiOH.H.sub.2O (32.4 g, 0.77 mol) in THF/water
(500 mL/170 mL) was stirred at room temperature for 36 h. To the
reaction mixture was added 6M HCl (130 mL), and then 1 N NaOH was
added until a neutral pH was obtained. The layers were separated,
and the aqueous layer was extracted once with EtOAc. The combined
organics were dried (MgSO.sub.4) and concentrated to provide
(2R)-3-cyclopentyl-2-({[(phenylmethyl)oxy]amino}methyl)propanoic
acid (22.85 g, >100%) as a clear, colorless oil. LCMS:
(M+H).sup.+: 277.9.
Part H
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid
[0323] Under a nitrogen atmosphere, formic acid (192 mL, 5 mol) was
dissolved in CH.sub.2Cl.sub.2 (450 mL) and cooled to 0.degree. C.
Acetic anhydride (73 mL, 0.77 mol) was then added, and the reaction
mixture was stirred for 45 min. After this time, a solution of
(2R)-3-cyclopentyl-2-({[(phenylmethyl)oxy]amino}methyl)propanoic
acid (22.85 g crude material, assumed 77.1 mmol) in
CH.sub.2Cl.sub.2 (450 mL) was added, and the resulting mixture was
stirred for 1.5 h at 0.degree. C. The volatiles were then removed,
the crude residue was dissolved in EtOAc (500 mL), and the mixture
was washed with brine (4.times.100 mL). The organics were dried
(MgSO.sub.4) and concentrated to provide
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (23.5 g, 100%) as a thick syrup. LCMS: (M+H).sup.+: 306.1.
[0324] The
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)pr-
opanoic acid, diisopropylethylamine salt, isopropanol solvate can
be prepared in the following manner:
To a solution of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (25.9 h, 85 mmol) in diethyl ether (85 mL) was added
diisopropylethylamine (19.7 mL, 113 mmol), and the mixture was
stirred at room temperature for approximately 3 h. The reaction
mixture was then diluted with additional diethyl ether (85 mL) and
water (400 mL). The layers were separated, and the organic layer
was extracted two more times with a water/brine mixture (250 mL
water with 30 mL brine added and 200 mL water with 30 mL brine
added). The combined aqueous layers were then extracted with 40%
isopropanol in chloroform (3.times.300 mL). The combined
isopropanol/chloroform layers were dried (Na.sub.2SO.sub.4),
filtered and evaporated to provide the
2(R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid, diisopropylethylamine salt, isopropanol solvate (30.29 g) as
a clear beige oil. LCMS: (M+H).sup.+: 306.2.
Intermediate B
(2R)-3-Cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pro-
panoic acid
##STR00015##
[0325] Part A
(3R)-3-(Cyclopentylmethyl)-1-(tetrahydro-2H-pyran-2-yloxy)-2-azetidinone
[0326]
(3R)-3-(Cyclopentylmethyl)-1-[(phenylmethyl)oxy]-2-azetidinone (100
g, 386 mmol) was dissolved in ethanol (1.2 L), and the solution was
degassed. Pd on C (10%, dry, 8 g) was added and the suspension was
purged with hydrogen and stirred under a hydrogen atmosphere
(balloon) until the reaction was complete by LC-MS (approximately 6
h). The suspension was then sparged with nitrogen, filtered through
Celite, and evaporated to dryness. The resulting solid was
redissolved in CH.sub.2Cl.sub.2 (1 L) and dihydropyran (70 mL, 767
mmol) was added, followed by pyridinium p-toluenesulfonate (PPTS,
5%, 4.85 g). The reaction mixture was stirred 3 days at room
temperature, then concentrated and chromatographed on silica gel
using 10-20% ethyl acetate in hexanes to provide
(3R)-3-(cyclopentylmethyl)-1-(tetrahydro-2H-pyran-2-yloxy)-2-azetidinone
as a colorless liquid (100%).
Part B
(2R)-3-Cyclopentyl-2-{[(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoic
acid
[0327]
(3R)-3-(Cyclopentylmethyl)-1-(tetrahydro-2H-pyran-2-yloxy)-2-azetid-
inone (68 g, 268 mmol) was dissolved in THF (1 L) and placed in a
3-necked 3 L round bottomed flask that had been fitted with an
internal thermocouple, reflux condenser, and a mechanical stirrer.
A solution of lithium hydroxide monohydrate (56.3 g, 1.34 mol) in
400 mL H.sub.2O was prepared and added dropwise via the addition
funnel, with vigorous stirring. The reaction mixture was stirred at
room temperature for 36 h before being diluted with H.sub.2O (350
mL) and washed with hexanes (300 mL). The organic layer was
extracted with H.sub.2O (100 mL) and the combined aqueous layers
were cooled to 0.degree. C. and carefully acidified with 2M citric
acid (.about.525 mL) drop wise over the course of 90 min, keeping
the internal temperature below 10.degree. C. The acidified material
was extracted with ethyl acetate (3.times.250 mL) and the combined
organic layers were washed with water (2.times.), dried over
MgSO.sub.4, filtered, and evaporated. Benzene (500 mL) was added
and evaporated, and the residue was dried in vacuo to obtain
(2R)-3-cyclopentyl-2-{[(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoi-
c acid (70.9 g, 98%) as a colorless liquid.
Part C
(2R)-3-Cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pro-
panoic acid
[0328] To a solution of
(2R)-3-cyclopentyl-2-{[(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoi-
c acid (97.05 g, 358 mmol) in acetone (1.1 L) at room temperature
was added 5-methyl-2-thioxo-[1,3,4]thiadiazole-3-carbaldehyde (57.3
g, 358 mmol) (Tetrahedron Lett. 1985, 26, 3703-3706). When the
reaction was deemed complete, the acetone was removed in vacuo. The
residue was suspended in a mixture of hexanes (320 mL) and
methyl-t-butyl ether (180 mL), then sonicated. After 10 min, the
white solid (presumably 5-methyl-3H-[1,3,4]thiadiazole-2-thione)
was filtered off, and the filtrate was evaporated in vacuo to give
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid as a pale yellow gum (124 g, >100%). NMR shows the
product contains a small amount of MTBE and
5-methyl-3H-[1,3,4]thiadiazole-2-thione.
[0329]
(2R)-3-Cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]met-
hyl}propanoic acid can also be prepared according to literature
procedures [Bracken, Bushell, Dean, Francavilla, Jain, Lee,
Seepersaud, Shu, Sundram, Yuan; PCT Int. Appl. (2006), WO
2006127576 A2].
[0330] The
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino-
]methyl}propanoic acid, diisopropylethylamine salt can be prepared
in the following manner:
[0331] A solution of
(2R)-3-cyclopentyl-2-{[(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoi-
c acid (39.45 g, 145 mmol) in methyl formate (300 mL) and
diisopropylethylamine (27.9 mL, 160 mmol) was placed in a sealed
tube and heated to 50.degree. C. for 4 days. After cooling to room
temperature, the methyl formate was removed in vacuo, and the
remaining residue was dissolved in diethyl ether. The ether
solution was extracted with water, and the layers were separated.
The aqueous layer was then back-extracted with a solution of 40%
isopropanol in chloroform (2.times.). The combined
isopropanol/chloroform layers were then concentrated in vacuo to
provide
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid as the diisopropylethyl amine salt (28 g, containing a
residual amount of chloroform and isopropanol).
Intermediate C
4,6-Dichloro-5-fluoro-2-methylpyrimidine
##STR00016##
[0332] Part A
5-Fluoro-4,6-dihydroxy-2-methylpyrimidine
[0333] A solution of 200 mL of 25% wt sodium methoxide in methanol
(0.84 mol) was diluted with an additional 200 mL of methanol.
Acetamidine-HCl (40 g, 0.42 mol) was added to the sodium methoxide
solution (white precipitate formed), followed by addition of
dimethyl fluoromalonate (70 g, 0.46 mol). The contents were stirred
at room temperature overnight, then concentrated in vacuo to
dryness. The resulting residue was redissolved in hot water (300
mL). After cooling the aqueous solution to room temperature,
concentrated HCl was added slowly until crystal formation (fine
white prisms) took place at about pH 5. Concentrated HCl was added
dropwise until pH 3, and then the contents were filtered. The
isolated crystals were rinsed with 1M HCl and dried under vacuum to
provide 5-fluoro-4,6-dihydroxy-2-methylpyrimidine (65.5 g,
>100%). LCMS: (M+H).sup.+: 145.
Part B
4,6-Dichloro-5-fluoro-2-methylpyrimidine
[0334] 5-Fluoro-4,6-dihydroxy-2-methylpyrimidine (assumed 60 g,
0.42 mol) was treated with 300 mL of POCl.sub.3 at 120.degree. C.
for 3 h. The reaction mixture was then cooled to room temperature
and concentrated in vacuo until the rate of solvent removal slowed
to a drop rate of less than 1 drop/second. The product is somewhat
volatile and excessive concentration in vacuo will reduce the
yield. The crude residue was poured over crushed ice, and the
resulting slurry was stirred for 1 h, during which time the
solution came to room temperature. A yellow solid formed which was
filtered off, washed with water, and air dried briefly until free
flowing. This solid was collected and placed in a dessicator over
P.sub.2O.sub.5 until dry, providing pure
4,6-dichloro-5-fluoro-2-methylpyrimidine (59 g, 79%). LCMS:
(M+H).sup.+: 181/183.
Intermediate D
4,6-Dichloro-2-ethyl-5-fluoropyrimidine
##STR00017##
[0335] Part A
2-Ethyl-5-fluoro-6-hydroxy-4(1H)-pyrimidinone
[0336] Propionamide hydrochloride salt (30.0 g, 276.3 mmol) and
dimethyl fluoromalonate (41.4 g, 276.3 mmol) in anhydrous methanol
(400 mL) were treated with solid NaOMe (45 g, 829 mmol)
portion-wise at room temperature. After the addition, the white
suspension was heated to 85.degree. C. and stirred for 2 h. The
solvent was then evaporated to dryness. To the residue was added 70
mL of 6 N HCl solution with vigorous stirring. The suspension was
stirred for 10 min until the residue was fully neutralized. The
white precipitate was collected by filtration and dried over vacuum
to give 2-ethyl-5-fluoro-6-hydroxy-4(1H)-pyrimidinone as a white
solid. LCMS: (M+H).sup.+: 159.0; (M+Na).sup.+: 181.1. In some
cases, this product may contain co-precipitated NaCl, causing the
yield to exceed the theoretical value. In such cases, this product
was carried forward through the next step with the NaCl
present.
Part B
4,6-Dichloro-2-ethyl-5-fluoropyrimidine
[0337] 2-Ethyl-5-fluoro-6-hydroxy-4(1H)-pyrimidinone (20 g, 126.6
mmol) in POCl.sub.3 (58 mL, 633 mmol) was heated at 125.degree. C.
(oil bath) for 2 h. An additional 68 mL of fresh POCl.sub.3 was
added to the hot solution. The resulting solution was heated for an
additional 2 h until all the starting material was consumed. The
excess POCl.sub.3 was distilled (62.degree. C. 68.degree. C.) in
vacuo to give a light brown residue. After being cooled to room
temperature, the residue was diluted with 50 mL of
CH.sub.2Cl.sub.2, then poured into ice water (200 mL). To this
mixture was added 200 mL of CH.sub.2Cl.sub.2 and the subsequent
mixture was stirred for 10 min. After separation of the two layers,
the aqueous layer was further extracted with 100 mL of
CH.sub.2Cl.sub.2. The combined organic layers were dried over
Na.sub.2SO.sub.4, then filtered through a short silica gel pad,
which was then washed with 150 mL of 1% MeOH in CH.sub.2Cl.sub.2.
Evaporation of the solvent provided
4,6-dichloro-2-ethyl-5-fluoropyrimidine (21 g, 85%) as a light
yellow liquid. LCMS: (M+H).sup.+: not detected.
Intermediate E
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-2-(c-
yclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
##STR00018##
[0338] Part A
5-Fluoro-6-hydroxy-2-methylthio-4(1H)-pyrimidinone
[0339] To a stirred solution of 2-methyl-2-thiopseudourea sulfate
(41.7 g, 0.15 mol) and dimethyl fluoromalonate (45 g, 0.30 mol) in
MeOH (600 mL) at 0.degree. C. (ice bath) was added NaOMe (48.6 g,
0.90 mol) in portions. After the addition was complete, the ice
bath was withdrawn and the reaction mixture was stirred at room
temperature overnight. LCMS showed the formation of the desired
pyrimidinone product. The reaction mixture was concentrated to near
dryness under vacuum, diluted with water (50 mL), and acidified
with 6N HCl (.about.150 mL) to .about.pH 2 to precipitate the
product. After filtration, the solid was washed with 1N HCl
(2.times.10 mL) and dried under vacuum to afford
5-fluoro-6-hydroxy-2-methylthio-4(1H)-pyrimidinone (35.7 g, 68%) as
a white solid. LCMS: (M+H).sup.+: 177.3.
Part B
4,6-Dichloro-5-fluoro-2-(methylthio)pyrimidine
[0340] A mixture of
5-fluoro-6-hydroxy-2-(methylthio)-4(1H)-pyrimidinone (35.7 g, 0.20
mol) in POCl.sub.3 (150 mL) was heated at 115.degree. C. for 3 h.
After cooling to room temperature, the reaction mixture was slowly
poured into an ice-water mixture (1500 mL) and stirred for 20 min.
The product was extracted into ethyl acetate (3.times.800 mL), and
the combined organic extracts were washed with water (2.times.1000
mL), brine (1000 mL), and dried (Na.sub.2SO.sub.4). Evaporation of
the solvent provided 4,6-dichloro-5-fluoro-2-(methylthio)pyrimidine
as a pale yellow solid (37.8 g, 89%). LCMS: (M+H).sup.+: not
detected.
Part C
4-Chloro-5-fluoro-6-hydrazino-2-(methylthio)pyrimidine
[0341] 4,6-Dichloro-5-fluoro-2-(methylthio)pyrimidine (16.8 g,
78.85 mmol) and triethylamine (16.49 mL, 118.3 mmol) were dissolved
in DMSO (200 mL) and stirred. The mixture was cooled to
.about.5.degree. C. with an ice water bath. To this solution was
slowly added hydrazine monohydrate (4.59 mL, 94.62 mmol). After the
addition was complete, the reaction mixture was warmed up to RT and
stirring was continued for 1 h. The reaction mixture was diluted
with water (500 mL), and the aqueous solution was extracted with
CH.sub.2Cl.sub.2 (3.times.300 mL). The combined organic solution
was washed with water (3.times.250 mL) and brine (250 mL), then
dried (Na.sub.2SO.sub.4) and concentrated in vacuo to afford
4-chloro-5-fluoro-6-hydrazino-2-(methylthio)pyrimidine as a red
foamy solid (9.70 g, 59%). LCMS: (M+H).sup.+: 208.9.
Part D
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-2-(c-
yclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
[0342] A mixture of
4-chloro-5-fluoro-6-hydrazino-2-(methylthio)pyrimidine (9.70 g,
46.5 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (19.9 g, 46.5 mmol), HOAt (6.96 g, 51.2 mmol), EDCl
(9.82 g, 51.2 mmol) and N-methyl morpholine (25.6 mL, 232.5 mmol)
in DMF (300 mL) was stirred at room temperature overnight. The
reaction mixture was diluted with ethyl acetate/hexanes (3:2, 1 L)
and washed with water (3.times.500 mL), and the organics were dried
(Na.sub.2SO.sub.4) and concentrated in vacuo. The residue was
purified by Gilson RP-HPLC (35-95% acetonitrile/water, 8 min
gradient time) to afford
[(2R)-3-{2-[6-chloro-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-2-(-
cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
as a red glass (12.89 g, 56.0%). LCMS: (M+H).sup.+: 490.4.
Intermediate F
2,4,6-Trichloro-5-fluoropyrimidine
##STR00019##
[0343] Part A
5-Fluoro-6-hydroxy-2,4(1H,3H)-pyrimidinedione
[0344] A mechanically stirred solution of urea (60.06 g, 1 mol) and
dimethyl fluoromalonate (150.11 g, 1 mol) in methanol (1 L) was
treated with 25 wt % NaOMe in methanol (.about.4.6 M, 435 mL, 2
mol). The mixture was refluxed for 3 h and then allowed to cool to
room temperature. The mixture was filtered, the wet cake was
dissolved in warm water (.about.1.2 L), and the resulting aqueous
solution was acidified with concentrated aqueous HCl (.about.160
mL) to pH=2 while stirring over 1 h. The mixture was allowed to
cool to room temperature, and the product was filtered and washed
thoroughly with water, then dried under vacuum to give
5-fluoro-6-hydroxy-2,4(1H,3H)-pyrimidinedione (80 g, 55%) as a
white solid. LCMS: (M+H).sup.+: 147.0.
Part B
2,4,6-Trichloro-5-fluoropyrimidine
[0345] Finely powdered
5-fluoro-6-hydroxy-2,4(1H,3H)-pyrimidinedione (74 g, 0.507 mol) was
added portionwise over 30 min to POCl.sub.3 (232 mL, 2.5 mol) with
stirring (exothermic). Upon complete addition, the mixture was held
at 60.degree. C. while N,N,-dimethylaniline (65 mL) was added
dropwise by syringe. After addition, the mixture was heated to
100-110.degree. C. (internal) until the reaction was judged
complete, usually in 4-8 h. The mixture was cooled and the bulk of
the remaining POCl.sub.3 was removed by careful vacuum distillation
at 80-90.degree. C. (some product can be detected in the POCl.sub.3
distillate). The remaining residue was poured onto ice (.about.1 L)
and stirred for 30 min, then extracted with ether (1.times.400 mL,
2.times.150 mL). The combined extracts were washed with water and
brine, then dried (MgSO.sub.4). Filtration and atmospheric
distillation of the ether provided the crude product, which was
distilled under reduced pressure to provide the product (28.8 g,
28%) as a low melting white crystalline solid (b.p. 80-85.degree.
C., 12 mm). LCMS: (M+H).sup.+: not detected.
Intermediate G
Tris(1,1-dimethylethyl)-2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydr-
azinetricarboxylate
##STR00020##
[0346] Part A
1,1-Dimethylethyl
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)hydrazinecarboxylate
[0347] 2,4,6-Trichloro-5-fluoropyrimidine (20.92 g, 104.1 mmol) was
dissolved in THF (300 mL) at room temperature and stirred. To this
stirring solution was added t-butyl carbazate (13.74 g, 104.1
mmol), followed by diisopropylethylamine (19.0 mL, 109.3 mmol). The
reaction mixture turned light yellow, and after several minutes a
precipitate formed. The reaction appeared complete after 1.5 h, as
monitored by TLC (10% EtOAc/Hex). The reaction mixture was
concentrated in vacuo to remove most of the THF, and the residue
was dissolved in CH.sub.2Cl.sub.2 (.about.400 mL). The solution was
washed with .about.400 mL of sat. aq. NH.sub.4Cl. The organics were
dried and concentrated to give a pale yellow solid (31.37 g). LCMS:
(M+H+2Na-Boc).sup.+: 241.
Part B
Tris(1,1-dimethylethyl)-2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydr-
azinetricarboxylate
[0348] 1,1-Dimethylethyl
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)hydrazinecarboxylate (31.37
g, 104.1 mmol assumed) was suspended in CH.sub.2Cl.sub.2 (400 mL).
Di-t-butyl dicarbonate (44.75 g, 205.0 mmol) was added to the
solution, followed by diisopropylethylamine (36.3 mL, 208.2 mmol).
When almost everything was dissolved, DMAP (1.27 g, 10.4 mmol) was
added slowly. The reaction mixture turned reddish, and after
.about.5 min, mild bubbling was observed. After 45 min, the
reaction appeared complete by LCMS, and the mixture had turned
light orange. The reaction mixture was washed with .about.300 mL
sat. NH.sub.4Cl, and the organics were set aside. A slurry was
prepared with .about.1800 mL Florsil in CH.sub.2Cl.sub.2, which was
poured onto a large fritted funnel. The entire organic solution was
then poured through the Florsil pad, washing with 2 L of
CH.sub.2Cl.sub.2. A red band was left behind on the Florsil, and
TLC showed that the product had finished eluting from the pad. The
filtrate was concentrated to a foamy colorless oil, which
crystallized overnight in the refrigerator (37.87 g, 73% from
2,4,6-trichloro-5-fluoropyrimidine). LCMS: (M+3H+2Na-3Boc).sup.+:
241.
Intermediate H
4,6-Dichloro-5-fluoro-2-(fluoromethyl)pyrimidine
##STR00021##
[0349] Part A
5-Fluoro-2-(fluoromethyl)-6-hydroxy-4(1H)-pyrimidinone
[0350] 2-Fluoro-acetamidine hydrochloride salt (11.2 g, 100 mmol)
and dimethyl fluoromalonate (15 g, 100 mmol) in anhydrous methanol
(300 mL) were treated with solid NaOMe (16.2 g, 300 mmol) and
heated to 50.degree. C. with stirring. When LCMS showed formation
of the desired product, the solvent was evaporated to dryness, and
the residue was neutralized with concentrated HCl (20 mL). The
white precipitate was collected by filtration to give
5-fluoro-2-(fluoromethyl)-6-hydroxy-4(1H)-pyrimidinone (100%
yield). LCMS: (M+H).sup.+: 163.1.
Part B
4,6-Dichloro-5-fluoro-2-(fluoromethyl)pyrimidine
[0351] 5-Fluoro-2-(fluoromethyl)-6-hydroxy-4(1H)-pyrimidinone (6 g,
37 mmol) was suspended in POCl.sub.3 (20 mL, 222 mmol) and stirred
at 120.degree. C. for 2 h. After evaporation of the excess
POCl.sub.3, the residue was poured onto ice and the resulting
mixture was extracted with CH.sub.2Cl.sub.2. The CH.sub.2Cl.sub.2
solution was passed through a silica gel pad, and the resulting
filtrate was concentrated to provide the pure
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine (6 g, 81%) as a
colorless liquid. LCMS: (M+H).sup.+: not detected.
Intermediate I
4,6-Dichloro-2-(difluoromethyl)-5-fluoropyrimidine
##STR00022##
[0352] Part A
2,2-Difluoroethanimidamide.HCl
[0353] To a stirred suspension of ammonium chloride (5.1 g, 95
mmol) in toluene (150 mL) at 0.degree. C. was added trimethyl
aluminum (46 mL, 2M, 92 mmol), stirring until effervescence ceased.
Methyl difluoroacetate (2.38 mL, 27 mmol) was added, and the
resulting mixture was stirred overnight at 80.degree. C. Upon
cooling to 0.degree. C., methanol was added slowly and the
resulting solution was stirred for 90 minutes at reduced
temperature, causing a solid to form. This was removed by
filtration through Celite, and the filtrate was evaporated to yield
2,2-difluoroethanimidamide.HCl (1.7 g, 48 5%) as a yellow tinged
solid.
Part B
2-(Difluoromethyl)-5-fluoro-6-hydroxy-4(1H)-pyrimidinone
[0354] Sodium metal (0.91 g, 40 mmol) was dissolved in MeOH (100
mL) to form sodium methoxide. 2,2-Difluoroethanimidamide.HCl (1.73
g, 13 mmol) was added followed by dimethyl fluoropropanedioate (2.0
g, 13 mmol). The resulting solution was stirred at 80.degree. C.
for 3 hours, then cooled to room temperature. Aqueous HCl (6 mL,
6M, 36 mmol) was added and the resulting mixture was concentrated
in vacuo. The remaining solid was washed with cold water and
filtered yielding
2-(difluoromethyl)-5-fluoro-6-hydroxy-4(1H)-pyrimidinone (1.43 g,
61%)
Part C
4,6-Dichloro-2-(difluoromethyl)-5-fluoropyrimidine
[0355] A mixture of
2-(difluoromethyl)-5-fluoro-6-hydroxy-4(1H)-pyrimidinone (1.43 g,
8.0 mmol) and POCl.sub.3 (6 mL) was heated at 110.degree. C. for
2.5 hours. After cooling to room temperature, the reaction mixture
was poured over ice and stirred for 30 min. The product was
extracted into DCM and the combined organics were washed once with
aqueous saturated sodium bicarbonate. The combined organics were
dried over sodium sulfate and concentrated in vacuo. This yielded
4,6-dichloro-2-(difluoromethyl)-5-fluoropyrimidine (460 mg, 27%) as
a yellow oil.
General Procedure A
Example 1
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidinyl)-4-p-
yrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00023##
[0356] Part A
5-Fluoro-4-hydrazino-2-methyl-6-(1-pyrrolidinyl)pyrimidine
[0357] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (100 mg, 0.55 mmol)
was dissolved in 2 mL of DMSO and stirred at room temperature.
Pyrrolidine (50 .mu.L, 0.61 mmol) was added, followed by DIPEA (210
.mu.L, 1.21 mmol). The resulting reaction mixture was stirred for 2
h, and then hydrazine was added (1.0 mL) and the contents were
heated to 80.degree. C. for 1 h. The reaction mixture was then
cooled to room temperature and purified by RP-HPLC to provide
5-fluoro-4-hydrazino-2-methyl-6-(1-pyrrolidinyl)pyrimidine (69 mg,
59%).
Part B
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidinyl)-4-p-
yrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamide
[0358] 5-Fluoro-4-hydrazino-2-methyl-6-(1-pyrrolidinyl)pyrimidine
(69 mg, 0.33 mmol),
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (110 mg, 0.36 mmol), and HOAt (49 mg, 0.36 mmol) were
dissolved in 2 mL of DMF. NMM (0.18 mL, 1.65 mmol) was added,
followed by EDC (69 mg, 0.36 mmol). After stirring overnight at
room temperature, the reaction mixture was purified by RP-HPLC to
provide
((2R)-2-(cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidinyl)-4--
pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamide (90
mg, 55%).
Part C
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidinyl)-4-p-
yrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0359]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidin-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamide
(90 mg, 0.18 mmol) was dissolved in 3 mL of MeOH, degassed and
placed under argon. 10% Pd/C (18 mg) was added, and the contents
were thoroughly degassed and placed under a hydrogen balloon for
approximately 3 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
The resulting filtrate was concentrated in vacuo to provide the
pure
((2R)-2-(cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1-pyrrolidinyl)-4--
pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide (42 mg, 57%).
LCMS: (M+H).sup.+: 407.6.
General Procedure B
Example 2
[(2R)-3-{2-[6-(1-Azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazino}-2-(-
cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00024##
[0360] Part A
6-Azetidinyl-2-ethyl-5-fluoro-4-hydrazinopyrimidine
[0361] 4,6-Dichloro-2-ethyl-5-fluoropyrimidine (195 mg, 1.0 mmol)
was dissolved in 3 mL of MeOH and stirred at room temperature.
Azetidine (74 .mu.L, 1.1 mmol) was added, followed by DIPEA (383
.mu.L, 2.2 mmol). The resulting reaction mixture was stirred at
room temperature until the azetidine displacement of one chlorine
was complete as monitored by LCMS. Then, the MeOH was removed in
vacuo, and the remaining residue was dissolved in a mixture of 2 mL
DMSO and 1 mL of hydrazine. The resulting solution was heated at
40.degree. C. for 1 h until the reaction was deemed complete by
LCMS. The crude reaction mixture was purified by RP-HPLC to provide
4-(1-azetidinyl)-2-ethyl-5-fluoro-6-hydrazinopyrimidine (136 mg,
64%). LCMS: (M+H).sup.+: 212.1.
Part B
[(2R)-3-{2-[6-(1-Azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazino}-2-(-
cyclopentylmethyl)-3-oxopropyl)][(phenylmethyl)oxy]formamide
[0362] 4-(1-Azetidinyl)-2-ethyl-5-fluoro-6-hydrazinopyrimidine (88
mg, 0.42 mmol),
(2R)-3-cyclopentyl-2-({formyl[phenylmethyl)oxy]amino}methyl)propanoic
acid (140 mg, 0.46 mmol), and HOAt (56 mg, 0.42 mmol) were
dissolved in 3 mL of DMF. Then, NMM (71 .mu.L, 0.65 mmol) was
added, followed by EDC (75 mg, 0.40 mmol). After stirring overnight
at room temperature, the reaction mixture was purified by RP-HPLC
to provide
[(2R)-3-{2-[6-(1-azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (160
mg, 76%). LCMS: (M+H).sup.+: 499.4.
Part C
[(2R)-3-{2-[6-(1-Azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazino}-2-(-
cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0363]
[(2R)-3-{2-[6-(1-Azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazi-
no}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(160 mg, 0.32 mmol) was dissolved in 10 mL of MeOH, degassed and
placed under argon. 5% Pd/C (40 mg) was added, and the contents
were thoroughly degassed and stirred under a hydrogen balloon until
the reaction was deemed complete by LCMS. The contents were then
degassed and filtered through Celite, and the Celite pad was washed
with DCM and MeOH. The resulting filtrate was concentrated in vacuo
to provide
[(2R)-3-{2-[6-(1-azetidinyl)-2-ethyl-5-fluoro-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide (100 mg, 76%).
LCMS: (M+H).sup.+: 409.2.
General Procedure C
Example 3
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazi-
no}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00025##
[0364] Part A
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazi-
no}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formami-
de
[0365] To a pressure tube was added
[(2R)-3-{2-[6-chloro-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-2-(-
cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
(0.100 g, 0.204 mmol), azetidine hydrochloride (19.1 mg, 0.204
mmol), DIPEA (71.2 .mu.L, 0.408 mmol) and DMSO (2 mL). The tube was
sealed and was heated to 65-70.degree. C. with stirring for 3 days.
The reaction mixture was then cooled to RT and purified by RP-HPLC
to afford
[(2R)-3-{2-[6-(1-azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formam-
ide (68 mg, 65%). LCMS: (M+H).sup.+: 511.2.
Part B
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazi-
no}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0366]
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]-
hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)-
formamide (68 mg, 0.13 mmol) was dissolved in a mixture of
AcOH/H.sub.2O (20 mL, 4:1) and stirred at RT until LCMS indicated
completion of the deprotection (overnight). The reaction mixture
was concentrated to dryness under vacuum and purified by RP-HPLC to
provide
[(2R)-3-{2-[6-(1-azetidinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide (25 mg,
44%). LCMS: (M+H).sup.+: 427.2.
General Procedure D
Example 4
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hyd-
razino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00026##
[0367] Part A
2-Chloro-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimidine
[0368] To a solution of 2,4,6-trichloro-5-fluoropyrimidine (402 mg,
2.0 mmol) in DMSO (3 mL) was added DIPEA (0.52 mL, 3.0 mmol),
followed by N-methylpiperazine (0.24 mL, 2.2 mmol). The solution
was stirred at room temperature. After 30 min, anhydrous hydrazine
(1.29 mL, 99 mmol) was added, and the resulting mixture was heated
at 80.degree. C. for 30 min. After cooling to room temperature, the
excess hydrazine was removed in vacuo, and the remaining solution
was purified via RP-HPLC to provide the assumed
2-chloro-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimidin-
e (first eluent, 44 mg), as well as the assumed
6-chloro-5-fluoro-2-hydrazino-4-(4-methyl-1-piperazinyl)pyrimidine
(second eluent, 30 mg). LCMS: (M+H).sup.+: 261.1.
Part B
[(2R)-3-{2-[2-chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hyd-
razino}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)for-
mamide
[0369] A mixture of
2-chloro-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimidine
(31 mg, 0.12 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (36 mg, 0.12 mmol), HOAt (20 mg, 0.144 mmol), EDC (28
mg, 0.144 mmol) and NMM (26 uL, 0.144 mmol) in DMF (2 mL) was
stirred until the reaction was complete (2 h). The reaction mixture
was then purified via RP-HPLC to provide
[(2R)-3-{2-[2-chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)fo-
rmamide (30 mg, 46%). LCMS: (M+H).sup.+: 542.3; (M+Na).sup.+:
564.3.
Part C
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hyd-
razino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0370] A solution of
[(2R)-3-{2-[2-chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)
formamide (30 mg) in 4:1 AcOH:water (4 mL) was stirred at room
temperature overnight. The solvents were removed in vacuo, and the
resulting crude product was purified by RP-HPLC to provide
[(2R)-3-{2-[2-chloro-5-fluoro-6-(4-methyl-1-piperazinyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide (12 mg,
47%). LCMS: (M+H).sup.+: 458.3.
General Procedure E
Example 5
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydra-
zino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00027##
[0371] Part A
Tris(1,1-dimethylethyl)2-{2-chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyr-
imidinyl}-1,1,2-hydrazinetricarboxylate
[0372] To a vigorously stirred solution of isopropyl amine (83
.mu.L, 1.21 mmol) in DMF (6 mL) at 0.degree. C. was added DIPEA
(0.24 mL, 1.33 mmol) followed immediately by
tris(1,1-dimethylethyl)-2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hyd-
razinetricarboxylate (600 mg, 1.21 mmol). When the reaction was
complete as determined by LCMS, the reaction mixture was diluted
with diethyl ether (.about.40 mL) and washed with water (3.times.40
mL). The combined three aqueous layers were back-extracted once
with diethyl ether, and then the combined organics were dried
(Na.sub.2SO.sub.4) and concentrated in vacuo. This crude product
was purified by flash chromatography (Combiflash, 5-60% ethyl
acetate/hexanes, 1% triethylamine) to provide
tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}-1,1,2-hydraz-
inetricarboxylate (597 mg, 95%). LCMS: (M+H).sup.+: 520.2.
Part B
2-Chloro-5-fluoro-6-hydrazino-N-(1-methylethyl)-4-pyrimidinamine
[0373] A solution of
tris(1,1-dimethylethyl)2-{2-chloro-5-fluoro-6-[(1-methylethyl)amino]-4-py-
rimidinyl}-1,1,2-hydrazinetricarboxylate (597 mg, 1.15 mmol) in
MeOH (5 mL) and 4.0M HCl in dioxane (5 mL) was stirred at room
temperature overnight. After filtering away the precipitate, the
solvent was removed in vacuo, providing the crude
2-chloro-5-fluoro-6-hydrazino-N-(1-methylethyl)-4-pyrimidinamine,
presumably as the tri-HCl salt. LCMS: (M+H).sup.+: 219.9.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydra-
zino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0374] A mixture of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (268 mg, 0.88 mmol),
2-chloro-5-fluoro-6-hydrazino-N-(1-methylethyl)-4-pyrimidinamine
(assumed 253 mg of free base, 0.97 mmol), EDC (186 mg, 0.97 mmol),
HOAt (132 mg, 0.97 mmol), and NMM (0.64 mL, 5.82 mmol) in DMF was
stirred at room temperature overnight. The reaction mixture was
then purified via reverse phase HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydr-
azino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(74 mg, 17%). LCMS: (M+H).sup.+: 507.1.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydra-
zino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0375]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidiny-
l}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamid-
e (74 mg, 0.15 mmol) was dissolved in 5 mL of MeOH. Pd(OH).sub.2
(30 mg) was added, and the contents were stirred under a hydrogen
balloon for approximately 90 min. The contents were then filtered
to remove the catalyst, and the filtrate was concentrated in vacuo.
The resulting crude product was purified via reverse phase HPLC to
provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydr-
azino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide (32 mg,
51%). LCMS: (M+H).sup.+: 417.0.
General Procedure F
Example 6
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro--
2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00028##
[0376] Part A
4-(2,5-Dihydro-1H-pyrrol-1-yl)-5-fluoro-6-hydrazino-2-methylpyrimidine
[0377] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (181 mg, 1.0 mmol)
was dissolved in 4 mL of DMSO and stirred at room temperature.
3-Pyrroline (71 mg, 1.05 mmol) was added, followed by DIPEA (244
.mu.L, 1.4 mmol). The resulting reaction mixture was stirred until
displacement of the first chloride was complete, and then hydrazine
(350 .mu.L) and MeOH (.about.2 mL) were added to the reaction
mixture. The contents were then heated to 70.degree. C. for
.about.2 h, until displacement of the second chloride was complete.
The reaction mixture was then cooled to room temperature and
purified by RP-HPLC to provide
4-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro-6-hydrazino-2-methylpyrimidine
(142 mg, 68%).
Part B
((2R)-2-(Cyclopentyl
methyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro-2-methyl-4-pyrimidi-
nyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-pyran-2-yloxy)formamide
[0378]
4-(2,5-Dihydro-1H-pyrrol-1-yl)-5-fluoro-6-hydrazino-2-methylpyrimid-
ine (142 mg, 0.68 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (242 mg, 0.81 mmol), and HOAt (110 mg, 0.81 mmol) were
dissolved in 4 mL of DMF. NMM (370 .mu.L, 3.4 mmol) was added,
followed by EDC (155 mg, 0.81 mmol). When the starting materials
were consumed, the reaction mixture was purified by RP-HPLC to
provide
((2R)-2-(cyclopentylmethyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro-
-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-pyran-2-ylox-
y)formamide (140 mg, 55%).
Part C
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro--
2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0379] A solution of
((2R)-2-(cyclopentylmethyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro-
-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-pyran-2-ylox-
y)formamide (140 mg) in 4:1 AcOH:water (2 mL) was stirred at room
temperature until deprotection was complete. The solvents were
removed in vacuo, and the resulting crude product was purified by
RP-HPLC to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[6-(2,5-dihydro-1H-pyrrol-1-yl)-5-fluoro-
-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide (68
mg, 58%). LCMS: (M+H).sup.+: 407.3.
General Procedure G
Example 7
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]h-
ept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydro-
xyformamide
##STR00029##
[0380] Part A
(1S,4S)-2-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-5-methyl-2,5-diaza-
bicyclo[2.2.1]heptane
[0381] 2,4,6-Trichloro-5-fluoropyrimidine (2.01 g, 10 mmol) was
dissolved in 30 mL of DMSO and stirred at room temperature.
Commerically-available
(1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide
(2.74 g, 10 mmol) was added, followed by DIPEA (5.51 mL, 32 mmol).
The resulting reaction mixture was stirred for 2.5 h, and then
hydrazine was added (3.0 mL) and the contents were stirred at room
temperature overnight. The reaction mixture was then purified by
RP-HPLC to provide the assumed
(1S,4S)-2-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-5-methyl-2,5-diaz-
abicyclo[2.2.1]heptane (first eluent), as well as the assumed
4-chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-
(1H)-pyrimidinone hydrazone (second eluent).
Part B
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]h-
ept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phe-
nylmethyl)oxy]formamide
[0382]
(1S,4S)-2-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-5-methyl-2,-
5-diazabicyclo[2.2.1]heptane (170 mg, 0.62 mmol),
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (190 mg, 0.62 mmol), and HOAt (93 mg, 0.68 mmol) were
dissolved in 4 mL of DMF. NMM (0.27 mL, 2.5 mmol) was added,
followed by EDC (131 mg, 0.36 mmol). After stirring overnight at
room temperature, the reaction mixture was purified by RP-HPLC to
provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]-
hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(ph-
enylmethyl)oxy]formamide (90 mg, 55%).
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]h-
ept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydro-
xyformamide
[0383]
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[-
2.2.1]hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (90 mg, 0.18 mmol)
was dissolved in 3 mL of MeOH, degassed and placed under argon. 10%
Pd/C (18 mg) was added, and the contents were thoroughly degassed
and placed under a hydrogen balloon for approximately 3 hrs. The
contents were then degassed and filtered through Celite, and the
Celite pad was washed with DCM and MeOH. The resulting filtrate was
concentrated in vacuo to provide the pure
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyc-
lo[2.2.1]hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopr-
opyl]hydroxyformamide (42 mg, 57%). LCMS: (M+H).sup.+: 429.4.
[0384] Example 7 was also prepared in the following manner:
[0385]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[-
2.2.1]hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropy-
l]hydroxyformamide was prepared according to General Procedure D,
utilizing commerically-available
(1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane dihydrobromide in
place of N-methylpiperazine in Part A, and using 3 equivalents of
DIPEA in Part A.
General Procedure H
Example 8
((2R)-2-(Cyclopentylmethyl)-3-{2-[2-(difluoromethyl)-5-fluoro-6-(4-methyl--
1-piperazinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00030##
[0386] Part A
2-(Difluoromethyl)-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimidi-
ne
[0387] 4,6-Dichloro-2-(difluoromethyl)-5-fluoropyrimidine (200 mg,
0.92 mmol) was dissolved in DMSO (5 mL) and stirred at room
temperature. N-methylpiperazine (110 .mu.L, 0.96 mmol) was added,
followed by DIPEA (500 .mu.L, 2.9 mmol). The resulting mixture was
stirred at room temperature for 1 hour, until the
N-methylpiperazine displacement of one chlorine was complete as
determined by LCMS. Hydrazine (1 mL, 31 mmol) was added and the
reaction was stirred overnight at room temperature. The crude
reaction mixture was purified by RP-HPLC to provide
2-(difluoromethyl)-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimid-
ine (142 mg, 56%). LCMS: (M+H).sup.+: 277.0.
Part B
((2R)-2-(Cyclopentyl
methyl)-3-{2-[2-(difluoromethyl)-5-fluoro-6-(4-methyl-1-piperazinyl)-4-py-
rimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0388]
2-(Difluoromethyl)-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)p-
yrimidine (142 mg, 0.51 mmol) was added to a solution of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (156 mg, 0.51 mmol) in DMF (5 mL). To this mixture was added
HOAt (83 mg, 6.1 mmol), EDC (117 mg, 6.1 mmol) and NMM (0.28 mL,
2.6 mmol). The reaction was stirred overnight and the resulting
benzyl protected intermediate was isolated by RP-HPLC. This
material was then dissolved in degassed MeOH (5 mL) and 10% Pd/C
(20% w/w of the intermediate) was added. The resulting suspension
was stirred under a hydrogen balloon for 3 hours, after which time
the catalyst was removed by filtration. Concentration in vacuo
yielded
((2R)-2-(cyclopentylmethyl)-3-{2-[2-(difluoromethyl)-5-fluoro-6-(4-methyl-
-1-piperazinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
(78 mg, 32%). LCMS: (M+H).sup.+: 474.1
Example 9
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00031##
[0389] Part A
4-Azetidino-6-hydrazino-5-fluoro-2-methylpyrimidine
[0390] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (6 g, 33 mmol) was
dissolved in 50 mL of iPrOH and stirred at room temperature.
Azetidine-HCl (3.25 g, 35 mmol) was added, followed by 14.4 mL of
DIPEA. The resulting reaction mixture was stirred for 3 h, and then
hydrazine monohydrate was added (4.0 mL, 82.5 mmol) and the
contents were heated to 80.degree. C. overnight. The reaction
mixture was then cooled to room temperature and a precipitate
formed. The precipitate was filtered, washed with iPrOH, and dried.
The remaining filtrate was poured into 250 mL of water and
extracted (5.times.100 mL) with EtOAc. The combined organic
fractions were washed with water (2.times.100 mL) and brine
(2.times.100 mL). The organics were dried over sodium sulfate,
filtered, and concentrated in vacuo. This crude product was
purified by flash chromatography on silica gel using 97.5/2.5/0.25
DCM/MeOH/NH.sub.4OH as the eluent. The overall combined yield of
4-azetidino-6-hydrazino-5-fluoro-2-methylpyrimidine
(precipitate+chromatographed product) was 3.6 g (55%). LCMS:
(M+H).sup.+: 198.
Part B
[(2R)-3-{2-[6-(1-azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0391] 4-Azetidino-6-hydrazino-5-fluoro-2-methylpyrimidine (2.3 g,
11.6 mmol),
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propa-
noic acid (3.54 g, 11.6 mmol), and HOAt (1.9 g, 13.9 mmol) were
dissolved in 25 mL of DMF. DIPEA (6 mL, 34.8 mmol) was added,
followed by EDC (2.75 g, 13.9 mmol). After stirring overnight at
room temperature, the contents were poured into 400 mL of water
(precipitate formed) and extracted with ethyl acetate (4.times.200
mL). The combined organic fractions were washed with water
(2.times.200 mL) and brine (3.times.200 mL), and then dried over
sodium sulfate, filtered and concentrated to dryness. The crude
material was purified by flash chromatography on silica gel using
3% MeOH/DCM as the eluent, to provide
[(2R)-3-{2-[6-(1-azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (2.5
g, 44%). LCMS: (M+H).sup.+: 485.
Part C
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0392]
[(2R)-3-{2-[6-(1-Azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(3.9 g, 8.0 mmol) was dissolved in 50 mL of MeOH and degassed with
argon. 10% Pd/C (400 mg) was added, and the contents were placed
under a hydrogen balloon for 4.5 h. The contents were then degassed
with argon and filtered through Celite, and the Celite pad was
washed with DCM and MeOH. The resulting filtrate was concentrated
in vacuo to provide the pure
[(2R)-3-{2-[6-(1-azetidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide (3.1 g, 98%).
LCMS: (M+H).sup.+: 395.
Example 10
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-morpholinyl)-4-py-
rimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00032##
[0394]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-morpholiny-
l)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available morpholine in place of pyrrolidine in Part
A. LCMS: (M+H).sup.+: 425.4.
Example 11
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(methyloxy)am-
ino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00033##
[0396]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(methy-
loxy)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure A, utilizing
commercially-available N,O-dimethylhydroxylamine hydrochloride in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 399.2.
Example 12
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1,3-thiazolidin-3-y-
l)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00034##
[0398]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(1,3-thiazoli-
din-3-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available thiazolidine in place of pyrrolidine in Part
A. LCMS: (M+H).sup.+: 427.4.
Example 13
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(methyloxy)-1-aze-
tidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00035##
[0400]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(methyloxy-
)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure A, utilizing
commercially-available 3-methoxyazetidine hydrochloride in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 425.2.
Example 14
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3R)-3-(methyloxy)--
1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00036##
[0402] [(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-2-methyl-6-[(3R)-3-(methyloxy)-1-pyrrolidinyl]-4-p-
yrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide was prepared
according to General Procedure A, utilizing commercially-available
(R)-3-hydroxypyrrolidine hydrochloride in place of pyrrolidine in
Part A. LCMS: (M+H).sup.+: 439.2.
Example 15
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-(methyloxy)--
1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00037##
[0404]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-(meth-
yloxy)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformami-
de was prepared according to General Procedure A, utilizing
commercially-available (S)-3-hydroxypyrrolidine hydrochloride in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 439.2.
Example 16
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1-methylethyl)amin-
o]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00038##
[0406]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1-methyleth-
yl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available isopropylamine in place of pyrrolidine in
Part A. LCMS: (M+H).sup.+: 397.4.
Example 17
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(methyloxy-
)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyformamide
##STR00039##
[0408]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(me-
thyloxy)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyformamide
was prepared according to General Procedure A, utilizing
commercially-available N-(2-methoxyethyl)methylamine in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 427.2.
Example 18
[0409]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[ethyl(methyl)amino]-5-fluoro-2-
-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00040##
[0410] [(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[ethyl(methyl)amino]-5-fluoro-2-methyl-4-pyrimidinyl}hydr-
azino)-3-oxopropyl]hydroxyformamide was prepared according to
General Procedure A, utilizing commercially-available
N-ethylmethylamine in place of pyrrolidine in Part A. LCMS:
(M+H).sup.+: 397.4.
Example 19
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-pyr-
rolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00041##
[0412]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl-
)-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide was prepared according to General Procedure A, utilizing
commercially-available (S)-(+)-2-(hydroxymethyl)pyrrolidine in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 440.2.
Example 20
[(2R)-3-{2-[6-(Cyclobutylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-
-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00042##
[0414]
[(2R)-3-{2-[6-(Cyclobutylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hyd-
razino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available cyclobutylamine in place of pyrrolidine in
Part A. LCMS: (M+H).sup.+: 409.4.
Example 21
[(2R)-3-{2-[6-(Cyclopentylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00043##
[0416]
[(2R)-3-{2-[6-(Cyclopentylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available cyclopentylamine in place of pyrrolidine in
Part A. LCMS: (M+H).sup.+: 423.1.
Example 22
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(3R)-3-(hydroxymethyl)-1-pyr-
rolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00044##
[0418]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(3R)-3-(hydroxymethyl-
)-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide was prepared according to General Procedure A, utilizing
3(R)-pyrrolidinemethanol (J. of Med. Chem. 1987, 30, 1711-1715), in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 439.2.
Example 23
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(3S)-3-(hydroxymethyl)-1-pyr-
rolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00045##
[0420]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(3S)-3-(hydroxymethyl-
)-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide was prepared according to General Procedure A, utilizing
3(S)-pyrrolidinemethanol (J. of Med. Chem. 1987, 30, 1711-1715), in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 439.2.
Example 24
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1--
c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydr-
oxyformamide
##STR00046##
[0421] Part A
N-(Phenylmethyl)-D-serine
[0422] As per the procedures of WO2005058245, a mixture of D-serine
methyl ester hydrochloride (98.84 g, 635.3 mmol) in MeOH (280 mL)
was cooled to 10.degree. C. To the mixture was slowly added
triethylamine (88.5 mL, 635.0 mmol). The mixture was warmed to room
temperature and the resulting solution was cooled to 10.degree. C.
To the solution was added benzaldehyde (64 mL, 630.2 mmol), and the
solution was stirred for 30 min. To the solution was added sodium
borohydride (24.03 g, 635.2 mmol) portionwise over 30 min, and the
mixture was stirred for a further 30 min. In a separate flask, MeOH
(114 mL) was added to water (170 mL), and to this solution was
added a solution of NaOH (77.25 g, 1931 mmol) in water (155 mL).
The solution was cooled to 15.degree. C., and the reductive
amination mixture was slowly added to the NaOH water MeOH solution
over 15 min. The solution was stirred and warmed to room
temperature over 30 min, and water (170 mL) was added, followed by
sufficient 6 N aqueous HCl to adjust the pH to 9.5. The solution
was washed with EtOAc (2.times.60 mL), and sufficient 6 N aqueous
HCl was added to adjust the pH to 6.5. The mixture was cooled to
0.degree. C. and held overnight. The resulting solid was collected
by vacuum filtration and washed with water (2.times.200 mL)
followed by heptane (2.times.200 mL). The white solid was dried at
40.degree. C. under high vacuum for 3 days to afford
N-(phenylmethyl)-D-serine (79.51 g, 64%). LCMS: (M+H).sup.+:
196.1.
Part B
(3R)-5-Oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid
[0423] As per the procedures of WO2005058245, a solution of
N-(phenylmethyl)-D-serine (79.51 g, 407.3 mmol) in THF (485 mL) was
cooled to 0.degree. C., and a precooled 0.degree. C. solution of
K.sub.2CO.sub.3 (168.87 g, 1222 mmol) in water (485 mL) was added.
To the well-stirred mixture was added chloroacetyl chloride (45.4
mL, 570.0 mmol) slowly while keeping the internal temperature below
5.degree. C. The mixture was vigorously stirred at 0.degree. C. for
30 min, and then an additional portion of chloroacetyl chloride
(4.54 mL, 57.0 mmol) was slowly added. The mixture was stirred for
an additional 30 min at 0.degree. C. To the mixture was added a
sufficient quantity of precooled 0.degree. C. aqueous NaOH (50%
w/w) to adjust the pH>13.5 while keeping the internal
temperature between 5.degree. C. and 10.degree. C. The mixture was
stirred at 0.degree. C. for 2 h, and then warmed to 20.degree. C.
The mixture was washed with heptane (165 mL) followed by a second
portion of fresh heptane (240 mL). The aqueous phase was cooled to
0.degree. C., and adjusted to pH<2 with concentrated aqueous HCl
while keeping the internal temperature less than 10.degree. C. The
mixture was placed in a 0.degree. C. freezer overnight, and the
solid was collected by vacuum filtration. The solid was washed with
water (2.times.300 mL) and dried in vacuo at 42.degree. C.
overnight. The resulting
(3R)-5-oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid (72.20 g,
75%) was isolated as a white solid. LCMS: (M+H).sup.+: 236.1.
Part C
(3R)-5-Oxo-N,4-bis(phenylmethyl)-3-morpholinecarboxamide
[0424] A mixture of
(3R)-5-oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid (69.67 g,
296.2 mmol) and 1-hydroxybenzotriazole (48.01 g, 355.4 mmol) in DCM
(990 mL) was cooled to 0.degree. C. To the mixture was added
4-methylmorpholine (163 mL, 1483 mmol), benzyl amine (35.6 mL,
325.9 mmol), and EDC (62.46 g, 325.8 mmol). The yellow solution was
stirred overnight at room temperature, and was then washed with
water (500 mL), 6 N aqueous HCl (300 mL), and water (200 mL). The
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo to give crude
(3R)-5-oxo-N,4-bis(phenylmethyl)-3-morpholinecarboxamide (97.05 g,
>100% crude yield) as a yellow foam. LCMS: (M+H).sup.+:
325.2.
Part D
1-Phenyl-N-{[(3S)-4-(phenylmethyl)-3-morpholinyl]methyl}methanamine
[0425] To a 0.degree. C. solution of
(3R)-5-oxo-N,4-bis(phenylmethyl)-3-morpholinecarboxamide (assumed
96.07 g, 296.2 mmol) in PhMe (750 mL) was added Red-Al (65% w/w in
PhMe, 645 mL) via addition funnel. After approximately 50 mL of
Re--Al had been added, the resulting mixture was warmed to room
temperature, and the remainder of the Red-Al was then added over 30
min. The mixture was then heated at 50.degree. C. and stirred
overnight. The solution was cooled to 0.degree. C., and the
reaction was quenched by the slow dropwise addition of 1 N aqueous
NaOH (50 mL). An additional portion of 1 N aqueous NaOH (500 mL)
was then added, followed by Et.sub.2O (200 mL). The phases were
separated, and the organic phase was washed with fresh 1 N aqueous
NaOH (400 mL). The combined aqueous phase was extracted with fresh
4:1 PhMe-Et.sub.2O (250 mL), and the combined organic phase was
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo to give
1-phenyl-N-{[(3S)-4-(phenylmethyl)-3-morpholinyl]methyl}methanamine
as a yellow oil that was used without further purification. LCMS:
(M+H).sup.+: 297.1.
Part E
Ethyloxo((phenylmethyl){[(3S)-4-(phenylmethyl)-3morpholinyl]methyl}amino)a-
cetate
[0426] A solution of
1-phenyl-N-{[(3S)-4-(phenylmethyl)-3-morpholinyl]methyl}methanamine
(assumed 87.79 g, 296.2 mmol) and N,N-diisopropylethylamine (67.1
mL, 385.2 mmol) in THF (1000 mL) was cooled to 0.degree. C. To the
solution was added ethyl chloro(oxo)acetate (36.3 mL, 326.2 mmol)
dropwise via addition funnel. The resulting mixture was allowed to
stir and warm to room temperature for 1 h. The solvent was then
removed in vacuo to approximately 20% volume, and the residue was
partitioned between EtOAc (600 mL), water (100 mL) and sat. aqueous
NaHCO.sub.3 (500 mL). The aqueous phase was extracted with a fresh
portion of EtOAc (200 mL), and the combined organic phase was dried
over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in
vacuo. The residue was then azeotroped with EtOH (100 mL) to
provide ethyl
oxo((phenylmethyl){[(3S)-4-(phenylmethyl)-3-morpholinyl]methyl}amino)acet-
ate as a yellow oil that was used without further purification.
LCMS: (M+H).sup.+: 397.2.
Part F
(9aS)-8-(Phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
[0427] To a solution of ethyl
oxo((phenylmethyl){[(3S)-4-(phenylmethyl)-3-morpholinyl]methyl}amino)acet-
ate (assumed 117.43 g, 296.2 mmol) in EtOH (1000 mL) was added 10%
Pd/C (23 g). The resulting mixture was hydrogenated under balloon
pressure for 5 days, and then filtered through a glass fiber filter
with EtOH washes. The solution was then concentrated in vacuo and
crystallized from EtOH EtOAc to give approximately 15 g of a white
solid. The Pd/C filter cake was then slurried with MeOH (600 mL),
and the mixture was filtered through a glass fiber filter with MeOH
washes. The solution was then concentrated in vacuo and
crystallized from EtOH EtOAc to give a white solid that was
combined with the initial batch of solid. The combined mother
liquors were then concentrated in vacuo and crystallized from EtOH
EtOAc to give a white solid that was combined with the first two
batches of solid to afford
(9aS)-8-(phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
(39.97 g, 52% yield for 4 steps). LCMS: (M+H).sup.+: 261.1.
Part G
(9aS)-8-(Phenylmethyl)octahydropyrazino[2,1-c][1,4]oxazine
[0428] To a 0.degree. C. mixture of two combined batches of
(9aS)-8-(phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
(combined total 42.29 g, 162.5 mmol) in Et.sub.2O (406 mL) was
added 1 M LiAlH.sub.4 in Et.sub.2O (406 mL, 406 mmol) via dropping
funnel over 40 min. The mixture was then warmed to 35.degree. C.
and stirred for 6 days. The mixture was then cooled to 0.degree.
C., and EtOAc (100 mL) was slowly added, followed by water (20 mL),
15% aqueous NaOH (20 mL), and water (60 mL). The mixture was
vigorously stirred for 1 h, and then diluted with EtOAc (500 mL).
The mixture was filtered, and the filter cake was diluted with 1 N
aqueous NaOH (500 mL) and extracted with Et.sub.2O (2.times.200
mL). The combined organic phase (filtrate and Et.sub.2O
extractions) was dried over anhydrous Na.sub.2SO.sub.4, filtered,
concentrated in vacuo, azeotroped with MeOH (100 mL), and dried
overnight under high vacuum. The resulting colorless oil was
combined with a second batch of product prepared in the same
fashion from
(9aS)-8-(phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
(0.3047 g, 1.1 mmol) to give crude
(9aS)-8-(phenylmethyl)octahydropyrazino[2,1-c][1,4]oxazine
(combined total 38.59 g, >100% crude yield). LCMS: (M+H).sup.+:
233.1.
Part H
(9aS)-Octahydropyrazino[2,1-c][1,4]oxazine dihydrochloride
[0429] To a solution of
(9aS)-8-(phenylmethyl)octahydropyrazino[2,1-c][1,4]oxazine (assumed
38.02 g, 163.6 mmol) in MeOH (330 mL) was added 6 N aqueous HCl (55
mL, 330 mmol) and 10% Pd/C (3.80 g). The mixture was hydrogenated
overnight, and then filtered through a glass fiber filter. The
filter cake was washed with MeOH, and the combined solution was
concentrated in vacuo and azeotroped with MeOH (4.times.150 mL) to
provide (9aS)-octahydropyrazino[2,1-c][1,4]oxazine dihydrochloride
(34.78 g, 99% yield for 2 steps) as a red oil that solidified under
high vacuum. LCMS: (M+H).sup.+: 142.9.
Part I
(9aS)-8-(6-Chloro-5-fluoro-2-methyl-4-pyrimidinyl)octahydropyrazino[2,1-c]-
[1,4]oxazine
[0430] To a mixture of (9aS)-octahydropyrazino[2,1-c][1,4]oxazine
dihydrochloride (23.28 g, 108.2 mmol) in DCM (360 mL) was added
4,6-dichloro-5-fluoro-2-methylpyrimidine (19.59 g, 108.2 mmol) and
N,N-diisopropylethylamine (68 mL, 390.4 mmol). The mixture was
stirred for 2 h, and the resulting solution was diluted with DCM
(100 mL) and washed with saturated aq. NaHCO.sub.3 (200 mL). The
aqueous phase was extracted with a fresh portion of DCM (100 mL),
and this organic phase was washed with saturated aq. NaHCO.sub.3
(50 mL). The combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to give
(9aS)-8-(6-chloro-5-fluoro-2-methyl-4-pyrimidinyl)octahydropyrazino[2,1-c-
][1,4]oxazine as a light yellow oil that was used without further
purification. LCMS: (M+H).sup.+: 287.1.
Part J
(9aS)-8-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)octahydropyrazino[2,1-
-c][1,4]oxazine
[0431] To a solution of
(9aS)-8-(6-chloro-5-fluoro-2-methyl-4-pyrimidinyl)octahydropyrazino[2,1-c-
][1,4]oxazine (assumed 31.03 g, 108.2 mmol) in dioxane (430 mL) was
added hydrazine monohydrate (31 mL). The mixture was heated and
stirred at 80.degree. C. overnight, and then at 85.degree. C. for 7
h. The mixture was cooled to room temperature and concentrated in
vacuo. The residue was dissolved in DCM (500 mL) and washed with
saturated aq. NaHCO.sub.3 (200 mL). The aqueous phase was extracted
with a fresh portion of DCM (100 mL), and this organic phase was
washed with saturated aq. NaHCO.sub.3 (100 mL). The combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
concentrated in vacuo, and dried under high vacuum overnight to
provide
(9aS)-8-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)octahydropyrazino[2,-
1-c][1,4]oxazine (27.98 g, 92% yield for 2 steps) as a light yellow
solid. LCMS: (M+H).sup.+: 283.3.
Part K
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1--
c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(ph-
enylmethyl)oxy]formamide
[0432] To a solution of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid, N,N-diisopropylethylamine salt, isopropanol solvate (33.64 g,
68.0 mmol) in DMF (230 mL) was added
(9aS)-8-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)octahydropyrazino[2,-
1-c][1,4]oxazine (20.16 g, 71.4 mmol), N-methylmorpholine (30 mL,
273 mmol), 1-hydroxy-7-azabenzotriazole (11.10 g, 81.6 mmol), and
EDC (15.64 g, 81.6 mmol). The solution was stirred overnight and
then diluted with Et.sub.2O (500 mL). The mixture was washed with
water (2.times.200 mL), and the combined aqueous phase was
extracted with a fresh portion of Et.sub.2O (100 mL). This
Et.sub.2O phase was then washed with water (50 mL). This extraction
wash procedure was repeated 6 times, and the total combined organic
phase was then diluted with DCM (250 mL). The organic phase was
then dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to give crude
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(p-
henylmethyl)oxy]formamide (42.32 g, >100% crude yield) as a
light yellow foam. LCMS: (M+H).sup.+: 570.3.
Part L
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1--
c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydr-
oxyformamide
[0433] To a solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(p-
henylmethyl)oxy]formamide (assumed 38.74 g, 68.0 mmol) in methanol
(225 mL) was added 10% Pd/C (5.81 g). The mixture was hydrogenated
under balloon pressure for 4 h, and was then filtered through a
glass fiber filter with MeOH washes. The resulting solution was
concentrated in vacuo to approximately 10% volume, diluted with
EtOAc (400 mL), and concentrated in vacuo to approximately 30%
volume. The resulting solid was collected by vacuum filtration and
washed with EtOAc. The mother liquor and EtOAc washings were
concentrated in vacuo to approximately 10% volume, and the
resulting solid was collected by vacuum filtration and washed with
EtOAc. The two crops of solid were combined and dried at 50.degree.
C. for 16 h under high vacuum to afford [(2R)-2-(cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-
-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
(25.48 g, 78% yield for 2 steps) as a white solid. LCMS:
(M+H).sup.+: 480.1.
Alternative Procedure
[0434] To a solution of crude
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(p-
henylmethyl)oxy]formamide (assumed 39.73 g, 69.74 mmol) in MeOH
(350 mL) was added 10% Pd/C (50% water, 7.9 g). The suspension was
hydrogenated under balloon pressure for 3 h, and was then filtered
through two glass fiber filters with MeOH washings. The resulting
solution was concentrated in vacuo to a volume of approximately 70
mL, and was then diluted with EtOAc (500 mL). The solution was
concentrated in vacuo to remove approximately 100 mL of solvent.
The resulting solid was collected by vacuum filtration, and washed
well with EtOAc followed by hexanes. The mother liquor was
concentrated in vacuo, and then diluted with EtOAc (200 mL). The
mixture was concentrated in vacuo to approximately 50% volume, and
the resulting solid was collected by vacuum filtration and washed
well with EtOAc followed by hexanes. The two batches of solid were
combined and placed under high vacuum overnight. To this material
was then added approximately 466 mg of material prepared through a
similar sequence, and the combined batch was heated at 50.degree.
C. under high vacuum overnight to afford
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide (28.27 g, 83% yield for 2 steps). LC/MS: (M+H).sup.+:
480.3. The resulting solid was analytically characterized and found
to be polymorphic form, Form 1.
Example 25
((2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazin-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00047##
[0435] Part A
2-Ethyl-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimidine
[0436] To an ice-cold solution of 1,4-dioxane (10 mL) and MeOH (2
mL) was added 4,6-dichloro-2-ethyl-5-fluoropyrimidine (1.0 g, 5.13
mmol), N-methylpiperazine (626 uL, 5.64 mmol) and DIPEA (1.97 mL,
12.4 mmol) sequentially. The solution was then stirred at room
temperature for 2 h. After the reaction was complete, anhydrous
hydrazine (1.29 mL, 99 mmol) was added. The resulting suspension
was heated at 90.degree. C. in a oil bath for 2 h until the
intermediate was consumed. Evaporation of the solvent gave a light
yellow solid. The solid was dissolved in CH.sub.2Cl.sub.2 (100 mL)
and washed with 1 N HCl. The aqueous phase was back-extracted with
DCM (50 mL). The combined organic layers were dried over anhydrous
Na.sub.2SO.sub.4. Evaporation of the solvent gave a light yellow
residue as the desired product (890 mg, 69%).
Part B
((2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazin-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamide
[0437] A solution of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (12.4 g, 40.6 mmol) in DMF (120 mL) was added to a mixture of
2-ethyl-5-fluoro-4-hydrazino-6-(4-methyl-1-piperazinyl)pyrimidine
(9.6 g, 37.8 mmol), HOAt (5.66 g, 41.58 mmol), and EDC (7.97 g,
41.58 mmol). The resulting solution was treated with NMM (9.1 mL,
83.2 mmol) and stirred at room temperature for 3 h. After the
reaction was complete, 200 mL of water was added and the solution
was extracted three times with 200 mL of ether. The combined
organic layers were washed with water (200 mL) and brine (100 mL),
and then dried over anhydrous Na.sub.2SO.sub.4. Evaporation of the
solvent provided a light yellow glassy solid as the pure product
(17.1 g, 84%).
Part C
((2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazin-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0438] A mixture of
((2R)-2-(cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazi-
nyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamide
(17.1 g, 31.61 mmol) and 10% Pd/C (4 g) suspended in MeOH (400 mL)
was stirred under a balloon of H.sub.2 gas. After 2 h, and
additional 2 g of fresh 10% Pd/C was added. The resulting
suspension was stirred for another 1.5 h under a hydrogen
atmosphere until the staring material was consumed. The Pd/C was
removed by filtration through Celite, washing with MeOH and
CH.sub.2Cl.sub.2. The filtrate was concentrated in vacuo. As the
evaporation proceeded, the product crystallized out from the
remaining solution. The evaporation continued until only .about.50
mL of liquid remained. The crystals were then collected by
filtration to provide the product as a white solid (10.0 g). The
filtrate was further evaporated to give a second crop of crystals
(1.5 g) as the pure product. In the same way, a third crop was
collected. The combined yield of
((2R)-2-(cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(4-methyl-1-piperazi-
nyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was 86%
(12.2 g). LCMS: (M+H).sup.+: 452.1.
Example 26
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(2-isoxazolidinyl)--
4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide
##STR00048##
[0440]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(2-isoxazoli-
dinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide was
prepared according to General Procedure B, utilizing
commercially-available isoxazolidine in place of azetidine in Part
A. LCMS: (M+H).sup.+: 425.2.
Example 27
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3-(dimethylamino)-1-pyrrolidin-
yl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformam-
ide
##STR00049##
[0442]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3-(dimethylamino)-1-pyr-
rolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydrox-
yformamide was prepared according to General Procedure B, utilizing
commercially-available (3R)-(+)-3-(dimethylamino)pyrrolidine in
place of azetidine in Part A. LCMS: (M+H).sup.+: 466.2.
Example 28
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3-(dimethylamino)-1-pyrrolidin-
yl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformam-
ide
##STR00050##
[0444]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3-(dimethylamino)-1-pyr-
rolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydrox-
yformamide was prepared according to General Procedure B, utilizing
commercially-available (3S)-(-)-3-(dimethylamino)pyrrolidine in
place of azetidine in Part A. LCMS: (M+H).sup.+: 466.2.
Example 29
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(3S)-3-hydroxy-1-p-
yrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00051##
[0446]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(3S)-3-hydr-
oxy-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformami-
de was prepared according to General Procedure B, utilizing
commercially-available (S)-3-hydroxypyrrolidine in place of
azetidine in Part A. LCMS: (M+H).sup.+: 439.2.
Example 30
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(3R)-3-hydroxy-1-p-
yrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00052##
[0448]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(3R)-3-hydr-
oxy-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformami-
de was prepared according to General Procedure B, utilizing
commercially-available (R)-3-hydroxypyrrolidine in place of
azetidine in Part A. LCMS: (M+H).sup.+: 439.0.
Example 31
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[6-(cyclopropylamino)-2-ethyl-5-fluoro--
4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide
##STR00053##
[0450]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[6-(cyclopropylamino)-2-ethyl-5--
fluoro-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide was
prepared according to General Procedure B, utilizing
commercially-available cyclopropylamine in place of azetidine in
Part A. LCMS: (M+H).sup.+: 409.2.
Example 32
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-6-(4-ethyl-1-piperazinyl)-5-fl-
uoro-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide
##STR00054##
[0452]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-6-(4-ethyl-1-piperaziny-
l)-5-fluoro-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide
was prepared according to General Procedure B, utilizing
commercially-available N-ethylpiperazine in place of azetidine in
Part A. LCMS: (M+H).sup.+: 466.5.
Example 33
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[4-(2-hydroxyethyl)-
-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00055##
[0454]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[4-(2-hydrox-
yethyl)-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyform-
amide was prepared according to General Procedure B, utilizing
commercially-available 1-(2-hydroxyethyl)piperazine in place of
azetidine in Part A. LCMS: (M+H).sup.+: 482.2.
Example 34
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(methylamino)-4-pyr-
imidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide
##STR00056##
[0456]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-5-fluoro-6-(methylamino-
)-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide was
prepared according to General Procedure B, utilizing
commercially-available methylamine in place of azetidine in Part A.
LCMS: (M+H).sup.+: 383.4.
Example 35
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-6-(ethylamino)-5-fluoro-4-pyri-
midinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide
##STR00057##
[0458]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[2-ethyl-6-(ethylamino)-5-fluoro-
-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformamide was
prepared according to General Procedure B, utilizing
commercially-available ethylamine in place of azetidine in Part A.
LCMS: (M+H).sup.+: 397.4.
Example 36
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[4-(1-methylethyl)--
1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00058##
[0460]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[4-(1-methyl-
ethyl)-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide was prepared according to General Procedure B, utilizing
commercially-available 1-isopropylpiperazine in place of azetidine
in Part A. LCMS: (M+H).sup.+: 480.
Example 37
1-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoyl]hydr-
azino}-2-ethyl-5-fluoro-4-pyrimidinyl)-N,N-dimethyl-L-prolinamide
##STR00059##
[0462]
1-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propano-
yl]hydrazino}-2-ethyl-5-fluoro-4-pyrimidinyl)-N,N-dimethyl-L-prolinamide
was prepared according to General Procedure B, utilizing
commercially-available N,N-dimethyl-L-prolinamide in place of
azetidine in Part A. LCMS: (M+H).sup.+: 494.2.
Example 38
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{[2-(dimethylamino)ethyl](methyl)ami-
no}-2-ethyl-5-fluoro-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydroxyformam-
ide
##STR00060##
[0464]
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{[2-(dimethylamino)ethyl](met-
hyl)amino}-2-ethyl-5-fluoro-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydrox-
yformamide was prepared according to General Procedure B, utilizing
commercially-available N,N,N'-trimethylethylenediamine in place of
azetidine in Part A. LCMS: (M+H).sup.+: 454.2.
Example 39
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-2--
ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00061##
[0465] Part A
(R)-1,2-Dimethylpiperazine, dihydrochloride salt
[0466] Commerically-available 1,1-dimethylethyl
(3R)-3-methyl-1-piperazinecarboxylate (1.0 g, 5.0 mmol), sodium
cyanoborohydride (1.57 g, 25 mmol), and formaldehyde (37% in
H.sub.2O, 2.25 mL, 30 mmol) were dissolved and stirred in MeOH (50
mL). Acetic acid (1.75 mL, 30 mmol) was added dropwise, and the
resulting reaction mixture was stirred at room temperature for 2 h.
After this time, the solvent was evaporated and the residue was
taken up in aq. NaHCO.sub.3 solution and extracted three times with
diethyl ether. After removal of the solvent from the combined ether
layers, the crude 1,1-dimethylethyl
(3R)-3,4-dimethyl-1-piperazinecarboxylate was dissolved in ethanol
and treated with 2 mL of concentrated HCl. A precipitate formed
which was filtered and then recrystallized from ethanol and water
to provide (R)-1,2-dimethylpiperazine, dihydrochloride salt (1.27
g).
Part B
N-[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-2-ethyl-5-fluoro-4-pyri-
midinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
[0467]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazi-
nyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide was prepared according to General Procedure B, utilizing
(R)-1,2-dimethylpiperazine, dihydrochloride salt in place of
azetidine, and using 3.5 equivalents of DIPEA in Part A. LCMS:
(M+H).sup.+: 466.2.
Example 40
[0468] N-[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-2-ethyl-5-fluoro-4-pyri-
midinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00062##
Part A
(S)-1,2-Dimethylpiperazine, dihydrochloride salt
[0469] (S)-1,2-Dimethylpiperazine dihydrochloride can be prepared
in a similar fashion to (R)-1,2-dimethylpiperazine dihydrochloride,
as described in Example 39.
Part B
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-2--
ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
[0470]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazi-
nyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide was prepared according to General Procedure B, utilizing
(S)-1,2-dimethylpiperazine dihydrochloride in place of azetidine,
and using 3.5 equivalents of DIPEA in Part A. LCMS: (M+H).sup.+:
466.2.
Example 41
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazinyl)-2-(m-
ethylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00063##
[0471] Part A
((2R)-2-(Cyclopentyl
methyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazinyl)-2-(methylthio)-4-pyrimi-
dinyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-pyran-2-yloxy)formamide
[0472] In a sealed tube,
{(2R)-2-(cyclopentylmethyl)-3-{2-[4-chloro-5-fluoro-2-(methylthio)-6-pyri-
midinyl]hydrazine}-3-oxopropyl}(tetrahydro-2H-pyran-2-yloxy)formamide
(11.60 g, 23.67 mmol), N-methyl piperazine (2.89 mL, 26.00 mmol,
1.1 eq) and N,N-diisopropyl ethylamine (4.95 mL, 28.40 mmol, 1.2
eq) were dissolved in dry DMSO (100 mL), and the mixture was heated
to 68.degree. C. with stirring for 3 days. The reaction mixture was
cooled to RT, diluted with water (300 mL) and extracted with ethyl
acetate/hexanes (2:1, 2.times.300 mL). The combined organic
solution was washed with water (3.times.200 mL), dried
(Na.sub.2SO.sub.4), and concentrated to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazi-
nyl)-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-py-
ran-2-yloxy)formamide as a red foamy solid (12.5 g, 95.4%).
Part B
((2R)-2-(Cyclopentyl
methyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazinyl)-2-(methylthio)-4-pyrimi-
dinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0473]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperaziny-
l)-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-pyra-
n-2-yloxy)formamide (2.5 g, 22.58 mmol) was dissolved in acetic
acid/water (4:1, 1 L) and stirred at RT for 3 days. The reaction
mixture was concentrated to dryness and co-evaporated with toluene
(20 mL) followed by methanol (50 mL)/triethylamine (20 mL). The
residue was dissolved in methanol (120 mL) and triethylamine (20
mL) and purified by Gilson HPLC (10-95% acetonitrile/water, 8 min
gradient time) to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[5-fluoro-6-(4-methyl-1-piperazinyl)-2-(-
methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
as a reddish foamy solid (6.90 g, 65.1%). LCMS: (M+H).sup.+:
470.2.
Example 42
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(ethylamino)-5-fluoro-2-(methylthio)-4-
-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00064##
[0475]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(ethylamino)-5-fluoro-2-(methyl-
thio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure C, utilizing
commercially-available ethylamine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 415.2.
Example 43
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(methylamino)-2-(methylthio)--
4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00065##
[0477]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(methylamino)-2-(methy-
lthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure C, utilizing
commercially-available methylamine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 401.1.
Example 44
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3S)-3-hydroxy-1-pyrrolidiny-
l]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00066##
[0479]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3S)-3-hydroxy-1-pyrr-
olidinyl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyforma-
mide was prepared according to General Procedure C, utilizing
commercially-available (S)-3-hydroxypyrrolidine in place of
azetidine hydrochloride in Part A. LCMS: (M+H).sup.+: 457.4.
Example 45
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(dimethylamino)-5-fluoro-2-(methylthio-
)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00067##
[0481]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(dimethylamino)-5-fluoro-2-(met-
hylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure C, utilizing
commercially-available dimethylamine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 415.5.
Example 46
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(methylthio)-6-(propylamino)--
4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00068##
[0483]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(methylthio)-6-(propyl-
amino)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure C, utilizing
commercially-available N-propylamine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 429.3.
Example 47
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-{[2-(methyloxy)ethyl]amino}-2-
-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00069##
[0485]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-{[2-(methyloxy)ethyl]a-
mino}-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
was prepared according to General Procedure C, utilizing
commercially-available methoxyethylamine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 445.2.
Example 48
1-[6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoyl)hydr-
azino]-5-fluoro-2-(methylthio)-4-pyrimidinyl]-N,N-dimethyl-L-prolinamide
##STR00070##
[0487]
1-[6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propano-
yl)hydrazino]-5-fluoro-2-(methylthio)-4-pyrimidinyl]-N,N-dimethyl-L-prolin-
amide was prepared according to General Procedure C, utilizing
commercially-available N,N-dimethyl-L-prolinamide in place of
azetidine hydrochloride in Part A. LCMS: (M+H).sup.+: 512.3.
Example 49
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3R)-3-hydroxy-1-pyrrolidiny-
l]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00071##
[0489]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3R)-3-hydroxy-1-pyrr-
olidinyl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyforma-
mide was prepared according to General Procedure C, utilizing
commercially-available (R)-3-hydroxypyrrolidine in place of
azetidine hydrochloride in Part A. LCMS: (M+H).sup.+: 457.2.
Example 50
[0490]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3-(dimethylamino)-1-pyrro-
lidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydr-
oxyformamide
##STR00072##
[0491]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3-(dimethylamino)-1-pyrro-
lidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydr-
oxyformamide was prepared according to General Procedure C,
utilizing commercially-available
(3R)-(+)-3-(dimethylamino)pyrrolidine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 484.4.
Example 51
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(me-
thylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00073##
[0493]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluor-
o-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
was prepared according to General Procedure C, utilizing
commercially-available N-ethylpiperazine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+: 484.2.
Example 52
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-morpholinyl)-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00074##
[0495]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-morpholinyl)-4-pyrimidinyl]hydra-
zino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure D, utilizing
commercially-available morpholine in place of N-methylpiperazine in
Part A. LCMS: (M+H).sup.+: 445.2.
Example 53
[(2R)-3-{2-[6-(1-Azetidinyl)-2-chloro-5-fluoro-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00075##
[0497]
[(2R)-3-{2-[6-(1-Azetidinyl)-2-chloro-5-fluoro-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure D, utilizing
commercially-available azetidine hydrochloride in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 415.2.
Example 54
[(2R)-3-{2-[2-Chloro-6-(4-ethyl-1-piperazinyl)-5-fluoro-4-pyrimidinyl]hydr-
azino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00076##
[0499]
[(2R)-3-{2-[2-Chloro-6-(4-ethyl-1-piperazinyl)-5-fluoro-4-pyrimidin-
yl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
commercially-available N-ethylpiperazine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 472.2.
Example 55
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-hydroxyethyl)(methyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00077##
[0501]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-hydroxyethyl)(methyl)amino]-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
commercially-available N-2-hydroxyethyl-N-methylamine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 433.6.
Example 56
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-(methyloxy)-1-azetidinyl]-4-pyrimidinyl-
}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00078##
[0503]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-(methyloxy)-1-azetidinyl]-4-pyri-
midinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
commercially-available 3-methoxyazetidine hydrochloride in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 445.7.
Example 57
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{methyl[2-(methyloxy)ethyl]amino}-4-pyrimi-
dinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00079##
[0505]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{methyl[2-(methyloxy)ethyl]amino}-4-
-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
commercially-available N-methyl-2-(methyloxy)ethanamine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 447.5.
Example 58
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H-
)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
##STR00080##
[0507]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(8aS)-hexahydropyrrolo[1,2-a]pyraz-
in-2(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure D,
utilizing commerically-available
(8aS)-octahydropyrrolo[1,2-a]pyrazine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 484.4.
Example 59
1-{6-Chloro-2-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propa-
noyl)hydrazino]-5-fluoro-4-pyrimidinyl}-N,N-dimethyl-L-prolinamide
##STR00081##
[0509]
1-{6-Chloro-2-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methy-
l}propanoyl)hydrazino]-5-fluoro-4-pyrimidinyl}-N,N-dimethyl-L-prolinamide
was prepared according to General Procedure D, utilizing
commercially-available N,N-dimethyl-L-prolinamide in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 500.1.
Example 60
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(propylamino)-4-pyrimidinyl]hydrazino}-2-(-
cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00082##
[0511]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(propylamino)-4-pyrimidinyl]hydrazi-
no}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was prepared
according to General Procedure D, utilizing propylamine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 417.1.
Example 61
[(2R)-3-(2-{2-Chloro-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00083##
[0513]
[(2R)-3-(2-{2-Chloro-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
(S)-1,2-dimethylpiperazine dihydrochloride (Example 40) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 472.2.
Example 62
[(2R)-3-(2-{2-Chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00084##
[0515]
[(2R)-3-(2-{2-Chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
(R)-1,2-dimethylpiperazine dihydrochloride (Example 39) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 472.2.
Example 63
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00085##
[0516] Part A
Methyl N-{[(phenyl
methyl)oxy]carbonyl}-D-alanyl-N-methylglycinate
[0517] To a mixture of N-{[(phenylmethyl)oxy]carbonyl}-D-alanine
(133.53 g, 598.2 mmol) in DCM (1100 mL) was added powdered
sarcosine methyl ester hydrochloride (83.49 g, 598.2 mmol),
1-hydroxybenzotriazole (80.81 g, 598.1 mmol), and
4-methylmorpholine (242 mL, 2201 mmol). The mixture was stirred for
10 min, and then EDC (114.68 g, 598.2 mmol) was added. The mixture
was stirred overnight, and was then washed with water (500 mL), 1 N
aqueous HCl (2.times.300 mL), and brine (300 mL). The organic phase
was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to give crude methyl
N-{[(phenylmethyl)oxy]carbonyl}-D-alanyl-N-methylglycinate (162.35
g, 88% yield) as a yellow oil. LCMS: (M+H).sup.+: 309.0.
Part B
(3R)-1,3-Dimethyl-2,5-piperazinedione
[0518] To a slurry of three combined batches of methyl
N-{[(phenylmethyl)oxy]carbonyl}-D-alanyl-N-methylglycinate
(combined total 489.09 g, 1586 mmol) in DCM (210 mL) was added MeOH
(1000 mL) and 10% Pd/C (50 g). The mixture was hydrogenated at 50
psi overnight, and then an additional portion of 10% Pd/C (5 g) was
added. The mixture was hydrogenated at 50 psi for an additional 6
h, and was then filtered and washed with MeOH and DCM. The
resulting clear liquid was evaporated to give a clear oil, which
subsequently solidified upon standing to afford
(3R)-1,3-dimethyl-2,5-piperazinedione (214.0 g, 95% yield) as a
pale yellow tinted solid. LCMS: (M+H).sup.+: 143.0.
Part C
(3R)-1,3-Dimethylpiperazine dihydrochloride
[0519] To a 0.degree. C. suspension of
(3R)-1,3-dimethyl-2,5-piperazinedione (93.74 g, 659.4 mmol) in THF
(660 mL) was added LiAlH4 (75.1 g, 1979 mmol) portionwise over 1 h.
The mixture was then heated at 65.degree. C. and stirred for 2.5 h.
The mixture was then cooled to 0.degree. C., and
Na.sub.2SO.sub.4.10H.sub.2O (75 g) was slowly added, followed by
slow addition of 1 N aqueous NaOH (1000 mL). The mixture was
extracted with CHCl.sub.3 (6.times.1000 mL), and the combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4 and
filtered. To the resulting solution was added 4 N HCl in dioxane
(367 mL), and the mixture was stirred overnight. The mixture was
then diluted with MeOH (2000 mL) and concentrated in vacuo. The
residue was azeotroped with MeOH (2.times.1000 mL) and placed under
high vacuum overnight to provide (3R)-1,3-dimethylpiperazine
dihydrochloride (102.22 g, 83% yield) as a brown gum. LCMS:
(M+H).sup.+: 115.1.
Part D
Tris(1,1-dimethylethyl)2-{2-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[0520] To (3R)-1,3-dimethylpiperazine dihydrochloride (102.22 g,
546.3 mmol) was added a solution of
tris(1,1-dimethylethyl)2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydr-
azinetricarboxylate (271.71 g, 546.3 mmol) in DMF (900 mL). The
mixture was cooled to 0.degree. C., and N,N-diisopropylethylamine
(295 mL, 1694 mmol) was added. The solution was stirred and warmed
to room temperature overnight. The solution was then diluted with
Et.sub.2O (1000 mL) and washed with water (1000 mL). The aqueous
phase was extracted with a fresh portion of Et.sub.2O (1000 mL),
and the combined organic phase was washed with water (2.times.500
mL). The organic phase was then diluted with DCM (1000 mL), dried
over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in
vacuo. The residue was filtered through a silica gel plug (30%
EtOAc in hexanes; 1% Et.sub.3N). The solution was then concentrated
in vacuo, and the residue was azeotroped with MeOH. The residue was
diluted with MeOH (1000 mL), and crystallized by addition of water.
The resulting solid was collected by vacuum filtration and washed
with 10% MeOH in water. The resulting yellow solid was dried at
50.degree. C. under high vacuum to give
tris(1,1-dimethylethyl)2-{2-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5--
fluoro-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (257.34 g, 82%
yield) as a light yellow solid. LCMS: (M+H).sup.+: 575.2.
Part E
2-Chloro-4-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazinopyrimidin-
e trihydrochloride
[0521] To a solution of
tris(1,1-dimethylethyl)2-{2-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5--
fluoro-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (215.28 g,
374.3 mmol) in DCM (1870 mL) was added 2 N HCl in Et.sub.2O (1870
mL, 3740 mmol). The solution was mechanically stirred for 64 h, and
the resulting suspension was allowed to settle. Most of the solvent
was then decanted, and the remaining solid was triturated with DCM
(1000 mL) and collected by vacuum filtration. The solid was washed
with DCM and dried under high vacuum to provide
2-chloro-4-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-
pyrimidine, assumed trihydrochloride (138.22 g, 96% yield) as a
light yellow powder. LCMS: (M+H).sup.+: 275.1.
Part F
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]form-
amide
[0522] To a 0.degree. C. mixture of
2-chloro-4-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazinopyrimidi-
ne, assumed trihydrochloride (126.70 g, 329.9 mmol) and
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid, N,N-diisopropylethylamine salt, isopropanol solvate (155.42
g, 314.1 mmol) in DMF (630 mL) was added 4-methylmorpholine (240
mL, 2183 mmol), followed by 1-hydroxy-7-azabenzotriazole (51.31 g,
377.0 mmol) and EDC (72.27 g, 377.0 mmol). The mixture was stirred
overnight, diluted with Et.sub.2O (1000 mL), and washed with water
(1000 mL). The aqueous phase was extracted with a fresh portion of
Et.sub.2O (1000 mL), and the combined organic phase was washed with
water (3.times.300 mL). The combined aqueous phase was extracted
with a fresh portion of Et.sub.2O (300 mL), and this Et.sub.2O
phase was washed with water (200 mL). The total combined organic
phase was diluted with DCM (1000 mL), dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to give crude
[(2R)-3-(2-{2-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (193.65 g,
>100% crude yield) as a dark red foam. LCMS: (M+H).sup.+:
562.3.
Part G
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0523] To a solution of crude
[(2R)-3-(2-{2-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (assumed 176.57 g, 314.1 mmol) in MeOH (800 mL) was added
20% Pd(OH).sub.2/C (14.13 g). The mixture was hydrogenated under
balloon pressure with monitoring every 30 min until the reaction
was judged to be complete (7 h). The mixture was then filtered
through a glass fiber filter with MeOH washes. The resulting dark
filtrate was concentrated in vacuo and purified by preparative
reverse phase chromatography (Luna C18 (2) column; 10 microns;
101.6 mm.times.250 mm; 250 nm UV detection; 480 mL/min; 40 mg/mL
sample concentration; 4 g injection mass; mobile phase A: 300 mmol
aqueous ammonium formate at pH 4.0; mobile phase B: MeCN; method:
28% B for 9 min; 90% B for 9 min; 28% B for 5 min). The product
solution fractions were combined and adjusted to pH 6.8 with
aqueous NH.sub.4OH, and then stirred with Darco (50% weight load
based on crude product) for 30 min at room temperature. The
solution was then filtered through Celite. The filtrate was
concentrated to a volume of 3.5 L, and the pH was adjusted from 5.6
to 8.5 with NH.sub.4OH, affording an orange precipitate. The
aqueous phase was extracted 3 times with EtOAc, and then the
combined organics were washed with water and brine. The organics
were dried (Na.sub.2SO.sub.4), filtered, and concentrated in vacuo
to a volume of 1 L, producing a tan precipitate. An equal volume of
heptane (1 L) was added, and the mixture was cooled to 0.degree. C.
for 1 h. Then the product was isolated by filtration, washing with
heptane, and dried under reduced pressure at 50.degree. C. for 20 h
to provide
[(2R)-3-(2-{2-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
(85.5 g, 57% yield for 2 steps) as a white solid. LCMS:
(M+H).sup.+: 472.2.
Example 64
[(2R)-3-(2-{2-Chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00086##
[0524] Part A
(3S)-1,3-Dimethylpiperazine, dihydrochloride
[0525] (3S)-1,3-Dimethylpiperazine, dihydrochloride can be prepared
in a manner similar to (3R)-1,3-dimethylpiperazine, dihydrochloride
(Example 63), using CBZ-L-alanine in place of CBZ-D-alanine.
Part B
[0526]
[(2R)-3-(2-{2-Chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
(S)-1,3-dimethylpiperazine in place of N-methylpiperazine in Part
A. LCMS: (M+H).sup.+: 472.2.
Example 65
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4]oxazin-
-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide
##STR00087##
[0528]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4-
]oxazin-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxoprop-
yl]hydroxyformamide was prepared according to General Procedure E,
utilizing (9aS)-octahydropyrazino[2,1-c][1,4]oxazine
dihydrochloride (which may be prepared as described in Example 24,
Parts A-H) in place of isopropyl amine in Part A, utilizing 2N HCl
in ether in Part B, performing an extractive (ether/water) workup
rather than HPLC purification in Part C, and purifying the final
product in Part D by recrystallization from EtOAc/ether rather than
HPLC. LCMS: (M+H).sup.+: 501.0.
Example 66
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-a-
zetidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformami-
de
##STR00088##
[0529] Part A
(2S)-2-Azetidinylmethanol, TFA salt
[0530] Commerically-available
(S)-1-(t-butoxycarbonyl)-2-azetidinemethanol (100 mg, 5.3 mmol) was
dissolved and stirred in dichloromethane (2 mL). Trifluoroacetic
acid (1 mL) was added dropwise, and the resulting reaction mixture
was stirred at room temperature until removal of the
t-butoxycarbonyl group was complete. Then the solvent was
evaporated and the crude, TFA salt of (2S)-2-azetidinylmethanol was
used directly in the next step.
Part B
N-[(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-azetidinyl]-2-methyl-4-
-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
[0531]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymeth-
yl)-1-azetidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxy-
formamide was prepared according to General Procedure A, utilizing
(2S)-2-azetidinylmethanol, TFA salt in place of pyrrolidine, and
using 3 equivalents of DIPEA in Part A. LCMS: (M+H).sup.+:
425.4
Example 67
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(dimethylamino)-5-fluoro-2-(fluorometh-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00089##
[0533]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(dimethylamino)-5-fluoro-2-(flu-
oromethyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
was prepared according to General Procedure A, utilizing
dimethylamine in place of pyrrolidine, and
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine in place of
4,6-dichloro-5-fluoro-2-methylpyrimidine in Part A. LCMS:
(M+H).sup.+: 401.2.
Example 68
[(2R)-3-{2-[6-(Cyclobutylamino)-5-fluoro-2-(fluoromethyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00090##
[0535]
[(2R)-3-{2-[6-(Cyclobutylamino)-5-fluoro-2-(fluoromethyl)-4-pyrimid-
inyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure A, utilizing
commercially-available cyclobutylamine in place of pyrrolidine, and
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine in place of
4,6-dichloro-5-fluoro-2-methylpyrimidine in Part A. LCMS:
(M+H).sup.+: 427.2.
Example 69
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[2-oxo-2-(1-pyrro-
lidinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydroxyformam-
ide
##STR00091##
[0536] Part A
Phenylmethyl[2-oxo-2-(1-pyrrolidinyl)ethyl]carba mate
[0537] Pyrrolidine (248 uL, 3 mmol), N--CBZ-glycine (628 mg, 3
mmol), and HOAt (408 mg, 3 mmol) were dissolved in 10 mL of
dichloromethane. NMM (0.66 mL, 6 mmol) was added, followed by EDC
(575 mg, 3 mmol). After stirring overnight at room temperature, the
reaction mixture was diluted with dichloromethane, washed with
water, saturated aqueous NaHCO.sub.3 solution, and saturated
aqueous NH.sub.4Cl solution, then dried (Na.sub.2SO.sub.4) and
evaporated to yield
phenylmethyl[2-oxo-2-(1-pyrrolidinyl)ethyl]carbamate as a beige
solid (782 mg, 100%). LCMS: (M+H).sup.+: 263.1.
Part B
2-Oxo-2-(1-Pyrrolidinyl)ethanamine, hydrochloride salt
[0538] Phenylmethyl[2-oxo-2-(1-pyrrolidinyl)ethyl]carbamate (782
mg, 3 mmol) was dissolved in 30 mL of MeOH, degassed and placed
under argon. 10% Pd/C (117 mg) was added followed by 0.5 mL 6N HCl,
and the contents were thoroughly degassed and placed under a
hydrogen balloon for approximately 3 hrs. The contents were then
degassed and filtered through Celite, and the Celite pad was washed
with DCM and MeOH. The resulting filtrate was concentrated in vacuo
to provide the 2-oxo-2-(1-pyrrolidinyl)ethanamine, hydrochloride
salt (491 mg, 100%). LCMS: (M+H).sup.+: 129.1.
Part C
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[2-oxo-2-(1-pyrro-
lidinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydroxyformam-
ide
[0539]
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[2-oxo-2-(-
1-pyrrolidinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydrox-
yformamide was prepared according to General Procedure A, utilizing
2-oxo-2-(1-pyrrolidinyl)ethanamine, hydrochloride salt in place of
pyrrolidine, and using 2.3 equivalents of DIPEA in Part A. LCMS:
(M+H).sup.+: 466.2.
Example 70
[0540]
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(2-ethyl-5-fluoro-6-{[(1R)-1-met-
hyl-2-oxo-2-(1-pyrrolidinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopro-
pyl}-N-hydroxyformamide
##STR00092##
Part A
Phenylmethyl[(1R)-1-methyl-2-oxo-2-(1-pyrrolidinyl)ethyl]carbamate
[0541] Pyrrolidine (1668 uL, 2 mmol), N--CBZ-D-alanine (446 mg, 2
mmol), and HOAt (272 mg, 2 mmol) were dissolved in 6 mL of
dichloromethane. NMM (0.44 mL, 4 mmol) was added, followed by EDC
(382 mg, 2 mmol). After stirring overnight at room temperature, the
reaction mixture was diluted with EtOAc, washed with water,
saturated aqueous NaHCO.sub.3 solution, and saturated aqueous
NH.sub.4Cl solution, then dried (Na.sub.2SO.sub.4) and evaporated
to yield
phenylmethyl[(1R)-1-methyl-2-oxo-2-(1-pyrrolidinyl)ethyl]carbamate
as a white solid (496 mg, 90%). LCMS: (M+H).sup.+: 277.2.
Part B
(2R)-1-Oxo-1-(1-pyrrolidinyl)-2-propanamine
[0542]
Phenylmethyl[(1R)-1-methyl-2-oxo-2-(1-pyrrolidinyl)ethyl]carbamate
(496 mg, 1.8 mmol) was dissolved in 20 mL of MeOH, degassed and
placed under argon. 10% Pd/C (125 mg) was added, and the contents
were thoroughly degassed and placed under a hydrogen balloon
overnight. The contents were then degassed and filtered through
Celite, and the Celite pad was washed with DCM and MeOH. The
resulting filtrate was concentrated in vacuo to provide the
(2R)-1-oxo-1-(1-pyrrolidinyl)-2-propanamine (235 mg, 91%). LCMS:
(M+H).sup.+: 143.1.
Part C
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(2-ethyl-5-fluoro-6-{[(1R)-1-methyl-2-o-
xo-2-(1-pyrrolidinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N--
hydroxyformamide
[0543]
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(2-ethyl-5-fluoro-6-{[(1R)-1-met-
hyl-2-oxo-2-(1-pyrrolidinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopro-
pyl}-N-hydroxyformamide was prepared according to General Procedure
A, utilizing (2R)-1-oxo-1-(1-pyrrolidinyl)-2-propanamine in place
of pyrrolidine in Part A. LCMS: (M+H).sup.+: 494.2.
Example 71
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(fluoromethyl)-6-[(3S)-3-(met-
hyloxy)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformam-
ide
##STR00093##
[0545]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(fluoromethyl)-6-[(3S)-
-3-(methyloxy)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure A, utilizing
commercially-available (S)-3-methoxylpyrrolidine in place of
pyrrolidine, and 4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine
in place of 4,6-dichloro-5-fluoro-2-methylpyrimidine in Part A.
LCMS: (M+H).sup.+: 457.2.
Example 72
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(propylamino)-4-pyri-
midinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00094##
[0547]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(propylamino)-
-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was prepared
according to General Procedure A, utilizing propylamine in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 494.2.
Example 73
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(fluoromethyl)-6-(propylamino-
)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00095##
[0549]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(fluoromethyl)-6-(prop-
ylamino)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available propylamine in place of pyrrolidine, and
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine in place of
4,6-dichloro-5-fluoro-2-methylpyrimidine in Part A. LCMS:
(M+H).sup.+: 415.2.
Example 74
N2-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoyl]hyd-
razino}-5-fluoro-2-methyl-4-pyrimidinyl)-N,N-dimethyl-D-alaninamide
##STR00096##
[0550] Part A
N.sup.1,N.sup.1-dimethyl-D-alaninamide
[0551] N.sup.1,N.sup.1-dimethyl-D-alaninamide, hydrochloride salt
was prepared in a manner similar to Example 69, utilizing
N--CBZ-D-alanine in place of N--CBZ-glycine, utilizing
dimethylamine, hydrochloride salt in place of pyrrolidine, and
using 3 equivalents of NMM.
Part B
N2-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoyl]hyd-
razino}-5-fluoro-2-methyl-4-pyrimidinyl)-N,N-dimethyl-D-alaninamide
[0552]
N2-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propan-
oyl]hydrazino}-5-fluoro-2-methyl-4-pyrimidinyl)-N,N-dimethyl-D-alaninamide
was prepared according to General Procedure A, utilizing
N.sup.1,N.sup.1-dimethyl-D-alaninamide, hydrochloride salt in place
of pyrrolidine in Part A. LCMS: (M+H).sup.+: 454.2.
Example 75
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(me-
thyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00097##
[0553] Part A
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino}-2-(cy-
clopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0554]
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
can be prepared in a manner similar to Intermediate E, utilizing
o-methylisourea sulphate in place of 2-methyl-2-thiopseudourea
sulfate in Part A and
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in place of
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid in part D. LCMS: (M+H).sup.+: 480.1.
Part B
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(me-
thyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamide
[0555]
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(0.150 g, 0.31 mmol), commercially available 1-ethylpiperazine
(0.080 mL, 0.63 mmol) and diisopropylethylamine (0.054 mL, 0.31
mmol) were stirred in DMSO (2 mL) overnight at 65.degree. C. The
reaction mixture was then purified by RP-HPLC to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(m-
ethyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamid-
e as a red solid (0.145 g, 83%). LCMS: (M+H).sup.+=558.3.
Part C
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(me-
thyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0556] A solution of
((2R)-2-(cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-fluoro-2-(m-
ethyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)[(phenylmethyl)oxy]formamid-
e (0.145 g, 0.26 mmol), and Pd(C) (0.030 g) in MeOH (10 mL) was run
under standard hydrogenation conditions as in General Procedure A,
Part C, to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[6-(4-ethyl-1-piperazinyl)-5-flu-
oro-2-(methyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
as a red solid (0.119 g, 98%). LCMS: (M+H).sup.+=468.4.
Example 76
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3R)-3-(dimethylam-
ino)-1-pyrrolidinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxy-
formamide
##STR00098##
[0558]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3R)-3-(dim-
ethylamino)-1-pyrrolidinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-
hydroxyformamide was prepared according to General Procedure H,
utilizing commerically-available
(3R)--N,N-dimethyl-3-pyrrolidinamine in place of N-methylpiperazine
in Part A. LCMS: (M+H).sup.+: 488.1.
Example 77
N2-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoyl]hyd-
razino}-2-ethyl-5-fluoro-4-pyrimidinyl)-N,N-dimethyl-D-alaninamide
##STR00099##
[0560]
N2-(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propan-
oyl]hydrazino}-2-ethyl-5-fluoro-4-pyrimidinyl)-N,N-dimethyl-D-alaninamide
was prepared according to General Procedure B, utilizing
N.sup.1,N.sup.1-dimethyl-D-alaninamide (Example 74) in place of
azetidine in Part A. LCMS: (M+H).sup.+: 468.1.
Example 78
N-[(2R)-3-{2-[6-(Butylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-2--
(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformamide
##STR00100##
[0562]
N-[(2R)-3-{2-[6-(Butylamino)-5-fluoro-2-methyl-4-pyrimidinyl]hydraz-
ino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformamide was
prepared according to General Procedure A, utilizing
commercially-available butylamine in place of pyrrolidine in Part
A. LCMS: (M+H).sup.+: 411.1.
Example 79
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-(methyloxy)-6-{[(1S)-1-(1-pyr-
rolidinylcarbonyl)propyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydro-
xyformamide
##STR00101##
[0563] Part A
[(1S)-1-(1-Pyrrolidinylcarbonyl)propyl]amine
[0564] Phenylmethyl[(1S)-1-(1-pyrrolidinylcarbonyl)propyl]carbamate
(J. Med. Chem., 1991, 34, 3149-58) was dissolved in methanol (20
mL) (559 mg, 1.9 mmol). Pd(OH).sub.2 (140 mg) was added, and the
resulting suspension was stirred under a hydrogen balloon until the
deprotection was complete. Filtration of the catalyst and
evaporation of the solvent yielded
[(1S)-1-(1-pyrrolidinylcarbonyl)propyl]amine (291 mg, 97%).
Part B
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino}-2-(cy-
clopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0565]
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
can be prepared in a manner similar to Intermediate E, utilizing
o-methylisourea sulphate in place of 2-methyl-2-thiopseudourea
sulfate in Part A and
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in place of
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid in part D LCMS: (M+H).sup.+: 480.1.
Part C
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-(methyloxy)-6-{[(1S)-1-(1-pyr-
rolidinylcarbonyl)propyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydro-
xyformamide
[0566]
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(70 mg, 0.15 mmol) was dissolved in DMSO (2 mL) and
[(1S)-1-(1-pyrrolidinylcarbonyl)propyl]amine (46 mg, 0.29 mmol) was
added, followed by DIPEA (26 .mu.L, 0.15 mmol). The resulting
mixture was stirred at 80.degree. C. for 6 days. The reaction was
purified directly by RP-HPLC yielding the benzyl protected
intermediate which was subsequently dissolved in degassed MeOH (7
mL). To this solution was added 10% Pd/C (6.3 mg) and the combined
mixture was stirred under a hydrogen balloon for 2 hours.
Filtration of the catalyst and evaporation of the solvent yielded a
crude residue which was purified by RP-HPLC. This yielded
{(2R)-2-(cyclopentylmethyl)-3-[2-(5-fluoro-2-(methyloxy)-6-{[(1S)-1-(1-py-
rrolidinylcarbonyl)
propyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyformamide
(15 mg, 20%).
Example 80
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-(methyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00102##
[0568]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3,4-dimethyl-1-piperaziny-
l]-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyform-
amide was synthesized according to Example 79, utilizing
(2R)-1,2-dimethylpiperazine (Example 39) in place of
[(1S)-1-(1-pyrrolidinylcarbonyl)propyl]amine in part C. LCMS:
(M+H).sup.+: 468.3.
Example 81
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3S)-3-(dimethylam-
ino)-1-pyrrolidinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxy-
formamide
##STR00103##
[0570]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3S)-3-(dim-
ethylamino)-1-pyrrolidinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]-
hydroxyformamide was prepared according to General Procedure H,
utilizing commerically-available
(3S)--N,N-dimethyl-3-pyrrolidinamine in place of N-methylpiperazine
in Part A. LCMS: (M+H).sup.+: 488.3.
Example 82
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(cyclopropylamino)-2-(difluoromethyl)--
5-fluoro-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00104##
[0572]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(cyclopropylamino)-2-(difluorom-
ethyl)-5-fluoro-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
was prepared according to General Procedure H, utilizing
cyclopropylamine in place of N-methylpiperazine in Part A. LCMS:
(M+H).sup.+: 431.3.
Example 83
(2S)-2-[(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoy-
l]hydrazino}-5-fluoro-2-methyl-4-pyrimidinyl)amino]-N,N-dimethylbutanamide
##STR00105##
[0573] Part A
(2S)-2-Amino-N,N-dimethylbutanamide, hydrochloride salt
[0574] (2S)-2-Amino-N,N-dimethylbutanamide, hydrochloride salt was
prepared in a manner similar to 2-oxo-2-(1-pyrrolidinyl)ethanamine,
hydrochloride salt (Example 69), utilizing N--CBZ-L-2-aminobutyric
acid in place of N--CBZ-glycine, utilizing dimethylamine,
hydrochloride salt in place of pyrrolidine, and using 3 equivalents
of NMM in Part A. (M+H).sup.+: 130.9.
Part B
(2S)-2-[(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoy-
l]hydrazino}-5-fluoro-2-methyl-4-pyrimidinyl)amino]-N,N-dimethylbutanamide
[0575]
(2S)-2-[(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}p-
ropanoyl]hydrazino}-5-fluoro-2-methyl-4-pyrimidinyl)amino]-N,N-dimethylbut-
anamide was prepared according to General Procedure A, utilizing
(2S)-2-amino-N,N-dimethylbutanamide, hydrochloride salt in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 468.1.
Example 84
(2S)-2-[(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoy-
l]hydrazino}-2-ethyl-5-fluoro-4-pyrimidinyl)amino]-N,N-dimethylbutanamide
##STR00106##
[0577]
(2S)-2-[(6-{2-[(2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}p-
ropanoyl]hydrazino}-2-ethyl-5-fluoro-4-pyrimidinyl)amino]-N,N-dimethylbuta-
namide was prepared according to General Procedure B, utilizing
(2S)-2-amino-N,N-dimethylbutanamide, hydrochloride salt (Example
83) in place of azetidine in Part A. LCMS: (M+H).sup.+: 482.1.
Example 85
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[(3S)-1-methyl-2-ox-
ohexahydro-1H-azepin-3-yl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydr-
oxyformamide
##STR00107##
[0579]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[(3S)-1-meth-
yl-2-oxohexahydro-1H-azepin-3-yl]amino}-4-pyrimidinyl)hydrazino]-3-oxoprop-
yl}hydroxyformamide was prepared according to General Procedure A,
utilizing (3S)-3-amino-1-methylhexahydro-2H-azepin-2-one (Example
193) in place of pyrrolidine in Part A. LCMS: (M+H).sup.+:
480.3.
Example 86
(2S)-2-{[6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoy-
l)hydrazino]-5-fluoro-2-(methyloxy)-4-pyrimidinyl]amino}-N,N-dimethylbutan-
amide
##STR00108##
[0580] Part A
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino}-2-(cy-
clopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0581]
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
can be prepared according to Intermediate E, utilizing
o-methylisourea sulphate in place of 2-methyl-2-thiopseudourea
sulfate in Part A and
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in place of
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid in part D. LCMS: (M+H).sup.+: 480.1.
Part B
(2S)-2-{[6-{2-[(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methy-
l)propanoyl]hydrazino}-5-fluoro-2-(methyloxy)-4-pyrimidinyl]amino}-N,N-dim-
ethylbutanamide
[0582]
[(2R)-3-{2-[6-Chloro-5-fluoro-2-(methyloxy)-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(0.133 g, 0.28 mmol), (2S)-2-amino-N,N-dimethylbutanamide,
hydrochloride salt (Example 83) (0.075 g, 0.45 mmol) and
diisopropylethylamine (0.1 mL, 0.62 mmol) were stirred in DMSO (2
mL) overnight at 65.degree. C. Then additional
diisopropylethylamine (0.2 mL) was added, and the reaction was
stirred for 7 days at 80.degree. C. Purified by RP-HPLC to provide
(2S)-2-{[6-{2-[(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}meth-
yl)propanoyl]hydrazino}-5-fluoro-2-(methyloxy)-4-pyrimidinyl]amino}-N,N-di-
methylbutanamide (0.036 g, 23%). LCMS: (M+H).sup.+=574.3.
Part C
(2S)-2-{[6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propanoy-
l)hydrazino]-5-fluoro-2-(methyloxy)-4-pyrimidinyl]amino}-N,N-dimethylbutan-
amide
[0583] A solution of
(2S)-2-{[6-{2-[(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}meth-
yl)propanoyl]hydrazino}-5-fluoro-2-(methyloxy)-4-pyrimidinyl]amino}-N,N-di-
methylbutanamide (0.036 g, 0.063 mmol), and Pd(C) (0.008 g) in MeOH
(10 mL) was run under standard hydrogenation conditions as in
General Procedure A, Part C, to provide
(2S)-2-{[6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propano-
yl)hydrazino]-5-fluoro-2-(methyloxy)-4-pyrimidinyl]amino}-N,N-dimethylbuta-
namide as an orange solid (0.019 g, 63%). LCMS:
(M+H).sup.+=484.4.
Example 87
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(tetrahydro-5H-[1,3]-
dioxolo[4,5-c]pyrrol-5-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide
##STR00109##
[0584] Part A
Phenyl methyl(cis)-3,4-dihydroxy-1-pyrrolidinecarboxylate
[0585] Phenylmethyl 2,5-dihydro-1H-pyrrole-1-carboxylate
(commerically-available) (5.07 g, 25 mmol) was dissolved in a
mixture of acetone (25 mL) and water (10 mL). NMO (5.9 g, 50 mmol)
was added followed by catalytic OsO.sub.4. The reaction was stirred
for 19 hours and then quenched by the addition of an aqueous
solution of Na.sub.2S.sub.2O.sub.3. A standard work-up followed by
silica gel chromatography (3:1 Hexane:ethyl acetate to pure ethyl
acetate to 9:1 DCM: MeOH) yielded
phenylmethyl(cis)-3,4-dihydroxy-1-pyrrolidinecarboxylate (0.872 g,
15%) as a clear oil. LCMS: (M+H).sup.+: 237.9.
Part B
(cis)-Tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyrrole
[0586] To a solution of phenylmethyl
(3R,4S)-3,4-dihydroxy-1-pyrrolidinecarboxylate (0.872 g, 3.7 mmol)
and dimethoxymethane (10 mL) in DCM (4 mL) was added 5 drops of
triflic acid and the resulting solution was stirred until the
reaction was judged to be complete by LCMS. Quenching the reaction
with a saturated aqueous solution of sodium bicarbonate followed by
a standard work-up and purification by RP-HPLC yielded the
intermediate
phenylmethyl(syn)-tetrahydro-5H-[1,3]dioxolo[4,5-c]pyrrole-5-carboxylate.
This was immediately dissolved in degassed MeOH (5 mL), 10% Pd/C
(25 mg) was added and the reaction was stirred under a hydrogen
balloon until it was judged to be complete by LCMS. Filtration and
concentration in vacuo yielded
(cis)-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyrrole (88 mg, 21%). LCMS:
(M+H).sup.+: 116.1.
Part C
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(tetrahydro-5H-[1,3]-
dioxolo[4,5-c]pyrrol-5-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide
[0587]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(tetrahydro-5-
H-[1,3]dioxolo[4,5-c]pyrrol-5-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hyd-
roxyformamide was prepared according to General Procedure A,
utilizing (cis)-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyrrole in place
of pyrrolidine in Part A. LCMS: (M+H).sup.+: 453.3.
Example 88
[(2R)-3-{2-[2-Chloro-6-(dimethylamino)-5-fluoro-4-pyrimidinyl]hydrazino}-2-
-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00110##
[0589]
[(2R)-3-{2-[2-Chloro-6-(dimethylamino)-5-fluoro-4-pyrimidinyl]hydra-
zino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure D, utilizing
commercially-available dimethylamine in place of N-methylpiperazine
in Part A. LCMS: (M+H).sup.+: 403.
Example 89
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(trans)-3-(dimethylamino)-4-methyl-1--
pyrrolidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydro-
xyformamide (Mixture of Diastereomers)
##STR00111##
[0590] Part A
(trans)-N,N,4-Trimethyl-3-pyrrolidinamine
[0591] A solution of commercially available
1,1-dimethylethyl(trans)-3-amino-4-methyl-1-pyrrolidinecarboxylate
(1 g, 5 mmol) and formaldehyde (0.69 mL, 25 mmol, 37% in water) in
THF (20 mL) was stirred at room temperature for 1 hour.
NaBH(OAc).sub.3 (7.4 g, 35 mmol) was added and the reaction was
stirred overnight. 1 M NaOH (20 mL) was added and the layers were
allowed to separate. The aqueous phase was extracted with ether and
the combined organics were dried over sodium sulfate, filtered and
concentrated to yield a crude residue. This material was dissolved
in 4 M HCl in dioxane (24 mL) and stirred for 3 hours. Evaporation
of the solvent yielded (trans)-N,N,4-trimethyl-3-pyrrolidinamine in
quantitative yield. LCMS: (M+H).sup.+: 129.1.
Part B
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(trans)-3-(dimethylamino)-4-methyl-1-pyrrolidinyl]-5-flu-
oro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0592]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(trans)-3-(dimethylamino)-4-me-
thyl-1-pyrrolidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropy-
l]hydroxyformamide was prepared as a mixture of diastereomers
according to General Procedure A, utilizing
trans-N,N,4-trimethyl-3-pyrrolidinamine in place of pyrrolidine in
Part A. LCMS: (M+H).sup.+: 466.4.
Example 90
(trans)-1-{6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propan-
oyl)hydrazino]-5-fluoro-2-methyl-4-pyrimidinyl}-N,N,4-trimethyl-3-pyrrolid-
inecarboxamide (Mixture of Diastereomers)
##STR00112##
[0593] Part A
(trans)-N,N,4-Trimethyl-3-pyrrolidinecarboxamide
[0594] A solution of commercially available
phenylmethyl(trans)-3-[(dimethylamino)carbonyl]-4-methyl-1-pyrrolidinecar-
boxylate (1.06 g, 3.4 mmol), DMAP (0.63 g, 5.2 mmol), and EDC (1.0
g, 5.2 mmol) in DCM (18 mL) was stirred for 5 min and dimethylamine
(1.9 mL, 3.8 mmol, 2M in THF) was added. The reaction was allowed
to stir until it was judged to be complete by LCMS and was quenched
with 1 M HCl. A standard work-up provided the desired amide
intermediate. This material was immediately dissolved in degassed
MeOH (20 mL) and 10% Pd/C (120 mg) was added. The reaction mixture
was allowed to stir under a hydrogen balloon until complete
deprotection was observed by LCMS. The catalyst was removed by
filtration to yield
(trans)-N,N,4-trimethyl-3-pyrrolidinecarboxamide. LCMS:
(M+H).sup.+: 157.2.
Part B
(trans)-1-{6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propan-
oyl)hydrazino]-5-fluoro-2-methyl-4-pyrimidinyl}-N,N,4-trimethyl-3-pyrrolid-
inecarboxamide
[0595]
(trans)-1-{6-[2-((2R)-3-Cyclopentyl-2-{[formyl(hydroxy)amino]methyl-
}propanoyl)hydrazino]-5-fluoro-2-methyl-4-pyrimidinyl}-N,N,4-trimethyl-3-p-
yrrolidinecarboxamide was prepared as a mixture of diastereoisomers
according to General Procedure A, utilizing
(trans)-N,N,4-trimethyl-3-pyrrolidinecarboxamide in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 494.4.
Example 91
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(trans)-3-(dimethy-
lamino)-4-methyl-1-pyrrolidinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopr-
opyl]hydroxyformamide (Mixture of Diastereomers)
##STR00113##
[0597]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3S,4R)-3-(-
dimethylamino)-4-methyl-1-pyrrolidinyl]-5-fluoro-4-pyrimidinyl}hydrazino)--
3-oxopropyl]hydroxyformamide was prepared as a 1:1 mixture of
diastereoisomers according to General Procedure H, utilizing
trans-N,N,4-trimethyl-3-pyrrolidinamine (Example 89) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 502.4.
Example 92
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(trans)-3-(dimethylamino)-4-methyl-1--
pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide
##STR00114##
[0599]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(trans)-3-(dimethylamino)-4-me-
thyl-1-pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl-
]hydroxyformamide was prepared as a 1:1 mixture of diastereoisomers
according to General Procedure B, utilizing
(trans)-N,N,4-trimethyl-3-pyrrolidinamine (Example 89) in place of
azetidine in Part A. LCMS: (M+H).sup.+: 480.3.
Example 93
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3R)-3,4-dimethyl--
1-piperazinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformam-
ide
##STR00115##
[0601]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3R)-3,4-di-
methyl-1-piperazinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure H, utilizing
(2R)-1,2-dimethylpiperazine dihydrochloride salt (Example 39) in
place of N-methylpiperazine in Part A. LCMS: (M+H).sup.+:
488.7.
Example 94
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[(3S)-1-methyl-2-ox-
o-2,3,4,7-tetrahydro-1H-azepin-3-yl]amino}-4-pyrimidinyl)hydrazino]-3-oxop-
ropyl}hydroxyformamide
##STR00116##
[0602] Part A
(2S)-2-({[(1,1-Dimethylethyl)oxy]carbonyl}amino)-4-pentenoic
acid
[0603] To a mixture of MeOH (60 mL) and water (70 mL) was added
L-2-amino-4-pentanoic acid (2.02 g, 17.5 mmol), K.sub.2CO.sub.3
(12.12 g, 88 mmol) and di-tert-butyl dicarbonate (4.02 g, 18.4
mmol). This mixture was stirred for 12 hours before being cooled to
0.degree. C. and acidified to pH 2 with 1 M HCl. Removal of the
MeOH yielded an aqueous solution that was extracted with DCM. The
combined organics were dried over sodium sulfate and concentrated
yielding
(2S)-2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-4-pentenoic acid
(3.47 g, 92%). LCMS: (M+Na).sup.+: 238.1.
Part B
1,1-Dimethylethyl
{(1S)-1-[(2-propen-1-ylamino)carbonyl]-3-buten-1-yl}carbamate
[0604] To a stirred solution of
(2S)-2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-4-pentenoic acid
(2.82 g, 13 mmol), DMAP (1.9 g, 16 mmol) and EDC (3.1 g, 16 mmol)
was added N-methylallylamine (1.38 mL, 14 mmol). The reaction was
stirred for 72 hours before being quenched by the addition of 1 M
HCl (15 mL). The resulting biphasic mixture was separated and the
aqueous phase was extracted once with DCM. The combined organics
were dried over sodium sulfate and concentrated to yield
1,1-dimethylethyl
{(1S)-1-[(2-propen-1-ylamino)carbonyl]-3-buten-1-yl}carbamate (0.94
g, 28%). LCMS: (M-.sup.tBut).sup.+: 238.1.
Part C
1,1-Dimethylethyl[(3S)-1-methyl-2-oxo-2,3,4,7-tetrahydro-1H-azepin-3-yl]ca-
rbamate
[0605] 1,1-Dimethylethyl
{(1S)-1-[(2-propen-1-ylamino)carbonyl]-3-buten-1-yl}carbamate (0.94
g, 3.9 mmol) was dissolved in DCM (350 mL) and
1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethy-
lene)(tricyclohexylphosphine)ruthenium (0.3 g, 3.5 mmol) was added.
The resulting solution was heated to 40.degree. C. and stirred for
12 hours. The solvent was evaporated under reduced pressure and the
crude product was purified by RP-HPLC yielding
1,1-dimethylethyl[(3S)-1-methyl-2-oxo-2,3,4,7-tetrahydro-1H-azepin-3-yl]c-
arbamate (0.6 g, 63%). LCMS: (M+H).sup.+: 242.3.
Part D
(3S)-3-Amino-1-methyl-1,3,4,7-tetrahydro-2H-azepin-2-one.HCl
[0606] To a solution of
1,1-dimethylethyl[(3S)-1-methyl-2-oxo-2,3,4,7-tetrahydro-1H-azepin-3-yl]c-
arbamate (0.6 g, 2.5 mmol) in DCM (4 mL) was added HCl (6.2 mL, 25
mmol, 4M in dioxane) and the resulting mixture was stirred for 12
hours. Removal of the solvents under reduced pressure yielded
(3S)-3-amino-1-methyl-1,3,4,7-tetrahydro-2H-azepin-2-one.HCl (500
mg, quantitative). LCMS: (M+H).sup.+: not detected.
Part E
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[(3S)-1-methyl-2-ox-
o-2,3,4,7-tetrahydro-1H-azepin-3-yl]amino}-4-pyrimidinyl)hydrazino]-3-oxop-
ropyl}hydroxyformamide
[0607]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{[(3S)-1-meth-
yl-2-oxo-2,3,4,7-tetrahydro-1H-azepin-3-yl]amino}-4-pyrimidinyl)hydrazino]-
-3-oxopropyl}hydroxyformamide was prepared in a manner similar to
Example 105, utilizing
(3S)-3-amino-1-methyl-1,3,4,7-tetrahydro-2H-azepin-2-one.HCl in
place of N-methyl-1-(4-pyrimidinyl)methanamine and using
diisopropylethylamine in place of triethylamine. LCMS: (M+H).sup.+:
478.5.
Example 95
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{2-(difluoromethyl)-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00117##
[0609]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(3S)-3,4-di-
methyl-1-piperazinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure H, utilizing
(2S)-1,2-dimethylpiperazine dihydrochloride salt (Example 40) in
place of N-methylpiperazine in Part A. LCMS: (M+H).sup.+:
488.6.
Example 96
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{2-(difluoromethyl)-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00118##
[0611]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-6-[(2S)-2,4-di-
methyl-1-piperazinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure H, utilizing
(3S)-1,3-dimethylpiperazine (Example 64) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 488.5.
Example 97
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00119##
[0612] Part A
1,1-Dimethylethyl (3S)-3,4-dimethyl-1-piperazinecarboxylate
[0613] Commercially available 1,1-dimethylethyl
(3S)-3-methyl-1-piperazinecarboxylate (3.05 g, 15.23 mmol),
formaldehyde (37% in water) (2.13 mL), sodium triacetoxy
borohoydride (5.52 g, 26.04 mmol) and DCM (250 mL) were stirred
overnight. The solvent was removed, and 1N NaOH was added to the
residue. The mixture was extracted with dichloromethane, and the
organics were dried (Na.sub.2SO.sub.4) and concentrated in vacuo to
provide 1,1-dimethylethyl (3S)-3,4-dimethyl-1-piperazinecarboxylate
as a clear oil (3.15 g. 97%). LCMS: (M+H).sup.+=215.3.
Part B
(2S)-1,2-Dimethylpiperazine dihydrochloride
[0614] 1,1-Dimethylethyl (3S)-3,4-dimethyl-1-piperazinecarboxylate
(3.15 g, 14.7 mmol) in 1N HCl (40 mL) was stirred overnight. Then
4M HCl in 1,4-dioxane (25 mL) was added and the reaction was left
to stir overnight. Removed volatiles in vacuo to provide
(2S)-1,2-dimethylpiperazine dihydrochloride as a white solid (2.88
g). LCMS: (M+H).sup.+=115.1.
Part C
4-Chloro-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
[0615] To a solution of 4,6-dichloro-5-fluoro-2-methylpyrimidine
(0.181 g, 1.0 mmol) and (2S)-1,2-dimethylpiperazine dihydrochloride
(0.189 g, 1.0 mmol) in THF (10 mL) was added triethylamine (0.42
mL, 3.0 mmol) at room temperature. MeOH (1 mL) was added to improve
solubility. The reaction mixture was stirred overnight, and then
the solvent was removed in vacuo. Ether, THF and water were added
to the resulting residue. The organics were separated, dried
(Na.sub.2SO.sub.4) and evaporated to provide
4-chloro-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
as a yellow solid (0.254 g, 98%). LCMS: (M+H).sup.+=259.3.
Part D
4-[(3S)-3,4-Dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidin-
e
[0616] To
4-chloro-6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpy-
rimidine (0.254 g, 0.98 mmol) in DMSO (3 mL) was added hydrazine
monohydrate (2 mL). The reaction was stirred at room temperature
for 3 days. The volatiles were removed in vacuo, and the residue
was purified by RP-HPLC to provide
4-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne as a yellow solid (0.161 g, 64%). LCMS: (M+H).sup.+=255.6.
Part E
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methyl-4-pyr-
imidinyl}hydrazino)-3-oxopropyl][(phenyl methyl)oxy]formamide
[0617]
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.184 g, 0.60 mmol),
4-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne (0.161 g, 0.63 mmol), NMM (0.21 mL, 1.89 mmol), HOAt (0.086 g,
0.63 mmol), and EDC (0.121 g, 0.63 mmol) were dissolved in DMF (4
mL), and the reaction was stirred overnight. Purified by RP-HPLC to
provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (0.219 g, 64%). LCMS: (M+H).sup.+=542.7.
Part F
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methyl-4-pyr-
imidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0618] A mixture of
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (0.219 g, 0.40 mmol) and Pd(C) (0.042 g) in MeOH (10 mL) was
run under standard hydrogenation conditions as in General Procedure
A, Part C, to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
as a white solid (0.172 g, 94%). LCMS: (M+H).sup.+=452.3.
Example 98
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00120##
[0619] Part A
1,1-Dimethylethyl (3R)-3,4-dimethyl-1-piperazinecarboxylate
[0620] Commercially available 1,1-dimethylethyl
(3R)-3-methyl-1-piperazinecarboxylate (2.78 g, 13.88 mmol),
formaldehyde (37% in water) (1.94 mL), sodium triacetoxy
borohoydride (5.03 g, 23.73 mmol) and DCM (200 mL) were stirred
overnight. The solvent was removed, and 1N NaOH was added to the
residue. The mixture was extracted with dichloromethane, and the
organics were dried (Na.sub.2SO.sub.4) and concentrated in vacuo to
provide 1,1-dimethylethyl (3R)-3,4-dimethyl-1-piperazinecarboxylate
as a clear oil (2.70 g, 91%). LCMS: (M+H).sup.+=215.4.
Part B
(2R)-1,2-Dimethylpiperazine dihydrochloride
[0621] 1,1-Dimethylethyl (3R)-3,4-dimethyl-1-piperazinecarboxylate
(2.70 g, 12.6 mmol) in 1N HCl (25 mL) was stirred overnight. Then
4M HCl in 1,4-dioxane (25 mL) was added and the reaction was left
to stir overnight. The volatiles were removed in vacuo to provide
(2R)-1,2-dimethylpiperazine dihydrochloride as a white solid (2.53
g). LCMS: (M+H).sup.+=115.1.
Part C
4-Chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
[0622] To a solution of 4,6-dichloro-5-fluoro-2-methylpyrimidine
(0.181 g, 1.0 mmol) and (2R)-1,2-dimethylpiperazine dihydrochloride
(0.189 g, 1.0 mmol) in THF (10 mL) was added triethylamine (0.42
mL, 3.0 mmol). MeOH (1 mL) was added to improve solubility.
Reaction left to stir overnight. The solvent was removed in vacuo,
and THF and ether were added to the resulting residue, which was
washed with water. The organics were dried (Na.sub.2SO.sub.4) and
concentrated in vacuo to provide
4-chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
as a yellow oil (0.242 g, 94%). LCMS: (M+H).sup.+=259.3.
Part D
4-[(3R)-3,4-Dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidin-
e
[0623] To
4-chloro-6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpy-
rimidine (0.242 g, 0.94 mmol) in DMSO (3 mL) was added hydrazine
monohydrate (2 mL). The reaction was stirred at room temperature
for 3 days. Removed volatiles in vacuo and purified by RP-HPLC to
provide
4-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne as a yellow solid (0.079 g, 33%). LCMS: (M+H).sup.+=255.3.
Part E
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]form-
amide
[0624]
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.079 g, 0.30 mmol),
4-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne (0.079 g, 0.31 mmol), NMM (0.10 mL, 0.90 mmol), HOAt (0.042 g,
0.31 mmol), and EDC (0.059 g, 0.31 mmol) were dissolved in DMF (4
mL) and treated in a manner similar to General Procedure A, Part B,
to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (0.082 g, 49%). LCMS: (M+H).sup.+=542.7.
Part F
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0625] A solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (0.082 g, 0.15 mmol), and Pd(C) (0.016 g) in MeOH (10 mL)
was run under standard hydrogenation conditions as in General
Procedure A, Part C, to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
as a white solid (0.067 g, 99%). LCMS: (M+H).sup.+=452.4.
Example 99
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(tetrahydro-1H-furo[-
3,4-c]pyrrol-5(3H)-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformami-
de
##STR00121##
[0626] Part A
[(cis)-1-(Phenylmethyl)-3,4-pyrrolidinediyl]dimethanol
[0627] Dimethyl(cis)-1-(phenylmethyl)-3,4-pyrrolidinedicarboxylate
(Chem. Pharm. Bull. 1985 33; 896-898) (2.44 g, 8.8 mmol) was
dissolved in THF (100 mL) and cooled to 0.degree. C. LiAlH.sub.4 (1
g, 26 mmol) was added in portions and the reaction was heated
overnight at 60.degree. C. Upon cooling to 0.degree. C., wet ether
was added followed by water (1 mL), 15 w/w NaOH (aq) (1 mL) and
water (3 mL). The resulting mixture was stirred for 15 min and
filtered through Celite yielding crude
[(cis)-1-(phenylmethyl)-3,4-pyrrolidinediyl]dimethanol (2.5 g)
which was used directly in the next reaction. LCMS: (M+H).sup.+:
222.3.
Part B
(cis)-3,4-Pyrrolidinediyldimethanol
[0628] To a solution of crude
[(cis)-1-(phenylmethyl)-3,4-pyrrolidinediyl]dimethanol (2.5 g) in
MeOH (50 mL) was added conc HCl (0.2 mL) followed by Pearlmans
catalyst (700 mg). The resulting suspension was hydrogenated for 48
hours at 50 psi on a Parr shaker, after which time a further 700 mg
of the catalyst was added. Hydrogenation for another 72 hours at 50
psi resulted in completion of the reaction. Removal of the catalyst
by filtration and evaporation of the solvents under reduced
pressure yielded (cis)-3,4-pyrrolidinediyldimethanol (970 mg, 7.4
mmol). LCMS: (M+H).sup.+: Not detected.
Part C
Phenylmethyl(cis)-3,4-bis(hydroxymethyl)-1-pyrrolidinecarboxylate
[0629] (cis)-3,4-Pyrrolidinediyldimethanol (970 mg, 7.4 mmol) was
dissolved in a mixture of MeOH (20 mL) and water (7 mL) and cooled
to 0.degree. C. Na.sub.2CO.sub.3 (1.96 g, 19 mmol) was added
followed by benzyl chloroformate (1.15 mL, 8.1 mmol) and the
resulting solution was stirred for 4 hours, maintaining the
temperature at 0.degree. C. The reaction was concentrated under
reduced pressure to remove most of the methanol, and the remaining
aqueous solution was extracted twice with EtOAc. The combined
organics were washed with brine and dried over sodium sulfate
before being concentrated in vacuo. RP-HPLC yielded
phenylmethyl(cis)-3,4-bis(hydroxymethyl)-1-pyrrolidinecarboxylate
(450 mg, 22%, 1.7 mmol). LCMS: (M+H).sup.+: 266.1.
Part D
[0630] Phenylmethyl
tetrahydro-1H-furo[3,4-c]pyrrole-5(3H)-carboxylate
[0631] To a mixture of DCM (3 mL) and pyridine (3 mL) was added
phenylmethyl(cis)-3,4-bis(hydroxymethyl)-1-pyrrolidinecarboxylate
(250 mg, 0.94 mmol) followed by tosyl-chloride (540 mg, 2.8 mmol)
and the resulting solution was refluxed for 4 hours. The solvents
were evaporated and the residue was azeotroped once with hexane
before being purified by RP-HPLC. This yielded phenylmethyl
tetrahydro-1H-furo[3,4-c]pyrrole-5(3H)-carboxylate (170 mg, 73%).
LCMS: (M+H).sup.+: 248.4.
Part E
Hexahydro-1H-furo[3,4-c]pyrrole
[0632] To a degassed solution of MeOH (5 mL) was added phenylmethyl
tetrahydro-1H-furo[3,4-c]pyrrole-5(3H)-carboxylate (170 mg, 0.68
mmol) followed by Pd/C (40 mg). Stirring under a hydrogen balloon
for 3 hours followed by filtration of the catalyst and evaporation
of the solvent yielded hexahydro-1H-furo[3,4-c]pyrrole (70 mg,
91%). LCMS: (M+H).sup.+: Not detected.
Part F
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(tetrahydro-1H-furo[-
3,4-c]pyrrol-5(3H)-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformami-
de
[0633]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(tetrahydro-1-
H-furo[3,4-c]pyrrol-5(3H)-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxy-
formamide was prepared according to General Procedure A, utilizing
hexahydro-1H-furo[3,4-c]pyrrole in place of pyrrolidine in Part A.
LCMS: (M+H).sup.+: 451.3.
Example 100
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R,4S)-3-(dimethylamino)-4-methyl-1--
pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide (D1)
##STR00122##
[0635]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R,4S)-3-(dimethylamino)-4-me-
thyl-1-pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl-
]hydroxyformamide was prepared according to General Procedure B,
utilizing trans-N,N,4-trimethyl-3-pyrrolidinamine (Example 89) in
place of azetidine in Part A. Chiral chromatography of the product
of part B yielded a single enantiomer which was deprotected
according to Part C. The absolute stereochemistry of this compound
is unknown and arbitrarily assigned on the pyrrolidine ring in the
above structure. LCMS: (M+H).sup.+: 480.6.
Example 101
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S,4R)-3-(dimethylamino)-4-methyl-1--
pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide (D2)
##STR00123##
[0637]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3S,4R)-3-(dimethylamino)-4-me-
thyl-1-pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl-
]hydroxyformamide was prepared according to General Procedure B,
utilizing trans-N,N,4-trimethyl-3-pyrrolidinamine (Example 89) in
place of azetidine in Part A. Chiral chromatography of the product
of part B yielded a single enantiomer which was deprotected
according to Part C. The absolute stereochemistry of this compound
is unknown and arbitrarily assigned on the pyrrolidine ring in the
above structure. LCMS: (M+H).sup.+: 480.4.
Example 102
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(trans)-3-(hydroxymethyl)-4-methyl-1-pyrr-
olidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydro-
xyformamide (Mixture of Diastereomers)
##STR00124##
[0638] Part A
Methyl
rac-(trans)-4-methyl-1-(phenylmethyl)-3-pyrrolidinecarboxylate
[0639] To a solution of
N-(methoxymethyl)-N-(trimethylsilylmethyl)benzylamine (1.8 mL, 7
mmol) and methyl crotonate (0.62 mL, 5.8 mmol) in DCM (25 mL) at
0.degree. C. was added dropwise a solution of trifluoroacetic acid
(0.045 mL, 0.58 mmol) in DCM (1 mL). The reaction was allowed to
warm to room temperature and was stirred for 3 h. Saturated sodium
bicarbonate solution was added and the phases were separated. The
aqueous phase was extracted twice with DCM and the combined
organics were dried over sodium sulfate and concentrated in vacuo.
This yielded crude methyl
rac-(trans)-4-methyl-1-(phenylmethyl)-3-pyrrolidinecarboxylate
(1.58 g) which was used without further purification. LCMS:
(M+H).sup.+: 234.3.
Part B
Rac-[(trans)-4-Methyl-3-pyrrolidinyl]methanol
[0640] [(trans)-4-Methyl-3-pyrrolidinyl]methanol was synthesized in
accordance with Example parts A and B, utilizing methyl
rac-(trans)-4-methyl-1-(phenylmethyl)-3-pyrrolidinecarboxylate in
place of
dimethyl(cis)-1-(phenylmethyl)-3,4-pyrrolidinedicarboxylate in part
A. LCMS: (M+H).sup.+: Not detected.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(trans)-3-(hydroxymethyl)-4-methyl-1-pyrr-
olidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydro-
xyformamide
[0641]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(trans)-3-(hydroxymethyl)-4-methyl-
-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropy-
l]hydroxyformamide was prepared according to General Procedure A,
utilizing Rac-(trans) [(3R,4R)-4-methyl-3-pyrrolidinyl]methanol in
place of pyrrolidine in Part A. The product was a mixture of
diastereomers. LCMS: (M+H).sup.+: 453.3.
Example 103
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2-pyridinylmethyl)-
amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00125##
[0642] Part A
6-Chloro-5-fluoro-2-methyl-N-(2-pyridinylmethyl)-4-pyrimidinamine
[0643] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (0.2 g, 1.111 mmol)
was dissolved in THF (1 mL). To this solution was added
triethylamine (0.17 mL, 1.22 mmol), followed by commercially
available (2-pyridinylmethyl)amine (0.11 mL, 1.067 mmol), which was
dissolved in THF (1 mL). The reaction was left to stir for 4 hours.
The reaction mixture was diluted with water and extracted with
ether. The organics were dried (MgSO.sub.4) and concentrated to
provide
6-chloro-5-fluoro-2-methyl-N-(2-pyridinylmethyl)-4-pyrimidinamine
as a yellow wax (0.2517 g, 90%). LCMS: (M+H).sup.+=253.3.
Part B
5-Fluoro-2-methyl-6-[(2-pyridinyl methyl)amino]-4(1H)-pyrimidinone
hydrazone
[0644]
6-Chloro-5-fluoro-2-methyl-N-(2-pyridinylmethyl)-4-pyrimidinamine
(0.2517 g, 0.999 mmol) was dissolved in 2 mL of DMSO and 1 mL of
hydrazine monohydrate. The resulting reaction mixture was stirred
overnight. Then the reaction mixture was purified by RP-HPLC to
provide
5-fluoro-2-methyl-6-[(2-pyridinylmethyl)amino]-4(1H)-pyrimidinone
hydrazone as a beige solid (0.0954 g, 39%). LCMS:
(M+H).sup.+=249.3.
Part C
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-2-methyl-6-[(2-pyridinyl
methyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenyl
methyl)oxy]formamide
[0645]
5-Fluoro-2-methyl-6-[(2-pyridinylmethyl)amino]-4(1H)-pyrimidinone
hydrazone (0.0954 g, 0.3846 mmol) and
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (0.141 g, 0.4622 mmol) were dissolved in DMF (3 mL). NMM (0.13
mL, 1.1824 mmol) was added, followed by HOAt (0.063 g, 0.4632 mmol)
and EDC (0.088 g, 0.459 mmol). After stirring overnight the
reaction mixture was purified by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2-pyridinylmethyl-
)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]formamide
as a white solid (0.0999 g, 48%). LCMS: (M+H).sup.+=536.3.
Part D
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2-pyridinylmethyl)-
amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0646]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2-pyridinyl-
methyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]form-
amide (0.0999 g, 0.1867 mmol) was dissolved in 10 mL of MeOH,
degassed and placed under nitrogen. Then 10% Pd(C) (0.025 g) was
added and the contents were degassed and stirred under a hydrogen
balloon for 2.75 h. The contents were then degassed and filtered
through an Acrodisc (CR PTFE 0.45 .mu.m). The resulting filtrate
was concentrated and purified by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2-pyridinylmethyl-
)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide as a
beige solid (0.0231 g, 28%). LCMS: (M+H).sup.+=446.5.
Example 104
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(8aS)-hexahydropyrro-
lo[1,2-a]pyrazin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide
##STR00126##
[0648]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(8aS)-hexahyd-
ropyrrolo[1,2-a]pyrazin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide was prepared according to General Procedure B,
utilizing commerically-available
(8aS)-octahydropyrrolo[1,2-a]pyrazine in place of azetidine and
DMSO in place of MeOH in Part A.
Example 105
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(4-pyridinylm-
ethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00127##
[0649] Part A
5-Fluoro-6-hydrazino-N,2-dimethyl-N-(4-pyridinylmethyl)-4-pyrimidinamine
[0650] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (0.18 g, 0.99 mmol)
was dissolved in DMSO (1 mL). To this solution was added
triethylamine (0.15 mL, 1.08 mmol), followed by commercially
available N-methyl-1-(4-pyridinyl)methanamine (0.122 g, 1.0 mmol).
The reaction was left to stir for 3 hours. Then hydrazine
monohydrate was added, and the resulting reaction mixture was
stirred overnight at room temperature. The reaction mixture was
heated to 60.degree. C. for 90 minutes. After cooling, the reaction
mixture was purified by RP-HPLC to provide
5-fluoro-6-hydrazino-N,2-dimethyl-N-(4-pyridinylmethyl)-4-pyrimidinamine
(0.130 g, 49%). LCMS: (M+H).sup.+=263.0.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(4-pyridinyl
methyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyran-2-
-yloxy)formamide
[0651]
5-Fluoro-6-hydrazino-N,2-dimethyl-N-(4-pyridinylmethyl)-4-pyrimidin-
amine (0.130 g, 0.496 mmol) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid, diisopropylamine salt, (0.238 g, 0.56 mmol) were
dissolved in DMF (5 mL). NMM (0.272 mL, 2.4739 mmol) was added,
followed by HOAt (0.081 g, 0.5955 mmol) and EDC (0.114 g, 0.5946
mmol). After stirring overnight, the reaction mixture was purified
by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(4-pyridinyl
methyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyran-2-
-yloxy)formamide as a beige solid (0.0979 g, 36%). LCMS:
(M+2H).sup.+=545.6.
Part C
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl(4-pyridinylm-
ethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0652] [(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-2-methyl-6-[methyl
(4-pyridinylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydr-
o-2H-pyran-2-yloxy)formamide (0.0979 g, 0.1802 mmol) was dissolved
in acetic acid (8 mL) and water (2 mL). The reaction was left to
stir overnight. The volatiles were evaporated, and the resulting
material was purified by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[methyl
(4-pyridinylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide as a beige solid (0.0273 g, 33%). LCMS:
(M+H).sup.+=460.7.
Example 106
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-5-fluoro-6-[(8aS)-hex-
ahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl-
]hydroxyformamide
##STR00128##
[0654]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-(difluoromethyl)-5-fluoro-6-[(8-
aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-3-ox-
opropyl]hydroxyformamide was prepared according to General
Procedure H, utilizing commercially available
(8aS)-octahydropyrrolo[1,2-a]pyrazine instead of N-methylpiperazine
in Part A. LCMS: (M+H).sup.+: 500.3.
Example 107
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1,3-thiazol-2-yl-
methyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00129##
[0655] Part A
5-Fluoro-4-hydrazino-2-methyl-6-[(1,3-thiazol-2-ylmethyl)amino]pyrimidine
[0656] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (180 mg, 1 mmol)
was dissolved in 1 mL of DMSO and stirred at room temperature.
(1,3-Thiazol-2-ylmethyl)amine (124 mg, 1.1 mmol) was added,
followed by triethylamine (150 .mu.L, 1.1 mmol). The resulting
reaction mixture was stirred for 3 h, then hydrazine was added (1.0
mL), and the contents were heated to 60.degree. C. for 1.5 h. The
reaction mixture was then cooled to room temperature and purified
by RP-HPLC to provide
5-fluoro-4-hydrazino-2-methyl-6-[(1,3-thiazol-2-ylmethyl)amino]pyrimidine
(97 mg, 38%). LCMS: (M+H).sup.+: 255.2.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1,3-thiazol-2-ylme-
thyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyran-2-yl-
oxy)formamide
[0657]
5-Fluoro-4-hydrazino-2-methyl-6-[(1,3-thiazol-2-ylmethyl)amino]pyri-
midine (80 mg, 0.33 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (Hunigs base salt, 140 mg, 0.33 mmol), and HOAt (45
mg, 0.33 mmol) were dissolved in 3 mL of DMF. NMM (0.1 mL, 0.9
mmol) was added, followed by EDC (65 mg, 0.33 mmol). After stirring
overnight at room temperature, the reaction mixture was purified by
RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1,3-thiazol-2-ylm-
ethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyran-2-y-
loxy)formamide (72 mg, 45%). LCMS: (M+H).sup.+: 536.2.
Part C
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1,3-thiazol-2-ylme-
thyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0658] [(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-2-methyl-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrim-
idinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
(67 mg, 0.13 mmol) in 4:1 AcOH:water (5 mL) was stirred at room
temperature overnight. The solvents were removed in vacuo, and the
resulting crude product was purified by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(1,3-thiazol-2-ylm-
ethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
(30 mg, 51%). LCMS: (M+H).sup.+: 452.1.
Example 108
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00130##
[0659] Part A
4-Chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
[0660] To 4,6-dichloro-5-fluoro-2-methylpyrimidine (0.309 g, 1.71
mmol) and triethylamine (0.83 mL, 5.98 mmol) in THF (6.0 mL) was
added (3S)-1,3-dimethylpiperazine dihydrochloride (Example 64)
(0.320 g, 1.71 mmol). MeOH (3 mL) was added to improve solubility
and the reaction was stirred for 4 days at room temperature. The
solvent was removed in vacuo, and ether, THF and water were added
to the resulting residue. The organics were dried
(Na.sub.2SO.sub.4) and concentrated in vacuo to provide
4-chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyr-
imidine as an orange solid (0.277 g, 63%). LCMS:
(M+H).sup.+=259.3.
Part B
4-[(2S)-2,4-Dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidin-
e
[0661]
4-Chloro-6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrim-
idine (0.277 g, 1.07 mmol), hydrazine monohydrate (0.5 mL) and DMSO
(2.0 mL) were stirred at room temperature overnight. Then the
reaction was heated to 50.degree. C. and stirred for 7 hours.
Purified by RP-HPLC to provide
4-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methyl-
pyrimidine as an orange solid (0.118 g, 43%). LCMS:
(M+H).sup.+=255.3.
Part C
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methyl-4-pyr-
imidinyl}hydrazino)-3-oxopropyl][(phenyl methyl)oxy]formamide
[0662]
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.139 g, 0.45 mmol),
4-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne (0.118 g, 0.46 mmol), NMM (0.15 mL, 1.38 mmol), HOAt (0.063 g,
0.46 mmol), and EDC (0.088 g, 0.46 mmol) were dissolved in DMF (2
mL). The reaction was stirred overnight. Purified by RP-HPLC to
provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide as a white solid (0.118 g, 47%). LCMS:
(M+H).sup.+=542.7.
Part D
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0663] A solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (0.118 g, 0.22 mmol) and Pd(C) (0.018 g) in MeOH (10 mL) was
treated as in General Procedure A, Part C, to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
as a white solid (0.089 g, 91%). LCMS: (M+H).sup.+=452.4.
Example 109
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00131##
[0664] Part A
4-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
[0665] To a solution of (3R)-1,3-dimethylpiperazine dihydrochloride
(Example 63) (5.88 g, 31.4 mmol) in dichloromethane (126 mL) was
added N,N-diisopropylethylamine (18.11 mL, 104 mmol), and
4,6-dichloro-5-fluoro-2-methylpyrimidine (5.69 g, 31.4 mmol). The
solution was heated at 35.degree. C. and stirred for 3 days. The
solution was cooled to room temperature, diluted with DCM (100 mL),
and washed with sat. aq. NaHCO.sub.3 (100 mL). The aqueous phase
was extracted with a fresh portion of DCM (50 mL), and the combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo to give crude
4-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
(9.60 g, >100% yield) as a brown oil that was used without
further purification. LCMS: (M+H).sup.+: 258.9.
Part B
4-[(2R)-2,4-Dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidin-
e
[0666] To a solution of
4-chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-methylpyrimidine
(9.6 g, assumed 31.4 mmol) in 1,4-dioxane (126 mL) was added
hydrazine monohydrate (8.5 mL, 175 mmol). The mixture was heated at
85.degree. C. and stirred for 24 h. The mixture was cooled to room
temperature and then concentrated in vacuo. The residue was
partitioned between DCM (200 mL) and sat. aq. NaHCO.sub.3 (100 mL).
The aqueous phase was extracted with a fresh portion of DCM (50
mL), and the combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to give crude
4-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne (8.04 g, >100% crude yield) as a dark orange oil. LCMS:
(M+H).sup.+: 254.9.
Part C
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]form-
amide
[0667] To a solution of
4-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-6-hydrazino-2-methylpyrimidi-
ne (8.04 g, assumed 31.4 mmol) in N,N-dimethylformamide (125 mL)
was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid diisopropylethylamine salt, isopropanol solvate (15.48 g, 31.3
mmol), N-methylmorpholine (17.21 mL, 156 mmol),
1-hydroxy-7-azabenzotriazole (5.11 g, 37.6 mmol), and EDC (7.20 g,
37.6 mmol). The solution was stirred overnight, and then diluted
with Et.sub.2O (150 mL) and washed with water (2.times.100 mL). The
combined aqueous phase was extracted with a fresh portion of
Et.sub.2O (150 mL), and this organic phase was washed with water
(75 mL). The total combined aqueous phase was extracted with
another fresh portion of Et.sub.2O (150 mL), and this organic phase
was washed with water (75 mL). The combined organic phase was
diluted with DCM (100 mL), and dried over anhydrous
Na.sub.2SO.sub.4. The mixture was filtered and concentrated in
vacuo to give crude
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (15.60 g, 28.8 mmol, 92% yield) as a light brown foam. LCMS:
(M+H).sup.+: 541.7.
Part D
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0668] To a solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-f-
luoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]for-
mamide (15.60 g, 28.8 mmol) in methanol (115 mL) was added Pd/C
(50% water, 3.1 g). The mixture was hydrogenated under balloon
pressure for 2 h, and then filtered through a glass fiber filter.
The solution was then concentrated in vacuo and azeotroped with
EtOAc (100 mL). The resulting solid was triturated with 70% EtOAc
in hexanes, and collected by vacuum filtration. The supernatant was
concentrated in vacuo and crystallized from EtOAc-hexanes, and the
solid was combined with the first crop of material. The combined
solid was dried overnight under high vacuum to give
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[(2R)-2,4-dimethyl-1-piperazinyl-
]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
(8.15 g, 18.05 mmol, 62.7% yield) as a white solid. LCMS:
(M+H).sup.+: 451.8.
Example 110
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3S,4R)-3-(dimethylamino)-4-methyl-1--
pyrrolidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl-
)hydroxyformamide (Mixture of Diastereomers)
##STR00132##
[0670]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3S,4R)-3-(dimethylamino)-4-me-
thyl-1-pyrrolidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-ox-
opropyl)hydroxyformamide was prepared as a 1:1 mixture of
diastereoisomers according to General Procedure C, utilizing
(trans)-N,N,4-trimethyl-3-pyrrolidinamine (Example 89) in place of
azetidine hydrochloride in Part A. LCMS: (M+H).sup.+498.5.
Example 111
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(8aS)-hexahydropyrrolo[1,2-a-
]pyrazin-2(1H)-yl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hyd-
roxyformamide
##STR00133##
[0672]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(8aS)-hexahydropyrrol-
o[1,2-a]pyrazin-2(1H)-yl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopro-
pyl)hydroxyformamide was prepared according to General Procedure C,
utilizing commerically-available
(8aS)-octahydropyrrolo[1,2-a]pyrazine in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+496.2.
Example 112
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-
-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyform-
amide (diastereomeric mixture)
##STR00134##
[0674]
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazi-
n-2-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydr-
oxyformamide was prepared as a mixture of diastereomers according
to General Procedure G, utilizing commercially-available
(+/-)-1,4-diazabicyclo[4.4.0]decane in place of
(1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide in
Part A, and using 1 equivalent of DIPEA. LCMS: (M+H).sup.+:
498.3.
Example 113
[(2R)-3-(2-{6-[Syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-2-chloro-5-fluor-
o-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformam-
ide
##STR00135##
[0675] Part A
Phenylmethyl 6-oxa-3-azabicyclo[3.1.0]hexane-3-carboxylate
[0676] To a 0.degree. C. solution of phenylmethyl
2,5-dihydro-1H-pyrrole-1-carboxylate (10.30 g, 50.68 mmol) in DCM
(250 mL) was added m-CPBA (wet; ca. 75%; 17.49 g). The solution was
stirred and warmed to room temperature overnight. The solution was
diluted with DCM and washed with 2.times.10% aq. NaHCO.sub.3-1 N
aq. NaOH (1:1). The organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, concentrated in vacuo, and purified by
silica gel chromatography (40% EtOAc in hexanes) to give
phenylmethyl 6-oxa-3-azabicyclo[3.1.0]hexane-3-carboxylate (7.90 g,
71% yield) as a light yellow oil.
Part B
Phenylmethyl
syn-3,4-bis(dimethylamino)-1-pyrrolidinecarboxylate
[0677] To a solution of phenylmethyl
6-oxa-3-azabicyclo[3.1.0]hexane-3-carboxylate (1.0029 g, 4.574
mmol) in MeOH (4.6 mL) was added dimethylamine (2.0 M in THF, 4.6
mL, 9.2 mmol). The solution was heated at 140.degree. C. under
microwave irradiation for 1 h, and then cooled to room temperature.
The solution was concentrated in vacuo, azeotroped with THF (40
mL), and then dissolved in THF (40 mL). To the solution was added
DMAP (56 mg, 0.458 mmol), N,N-diisopropylethylamine (1.6 mL, 8.96
mmol), and MsCl (0.390 mL, 5.039 mmol). The mixture was stirred for
2 h, and then dimethylamine (2.0 M in THF, 4.6 mL, 9.2 mmol) was
added. The mixture was stirred for 2 days, and then diluted with
DCM (100 mL) and washed with 1 N aq. NaOH (20 mL). The organic
phase was dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo. To a solution of the residue in MeOH (5 mL)
was added dimethylamine (2.0 M in THF, 4.6 mL, 9.2 mmol), and the
solution was heated at 140.degree. C. for 30 min under microwave
irradiation. The solution was concentrated in vacuo and purified
directly by Gilson RPLC to afford racemic phenylmethyl
syn-3,4-bis(dimethylamino)-1-pyrrolidinecarboxylate (911.4 mg, 68%
yield) as a light yellow oil. LCMS: (M+H).sup.+: 292.2.
Part C
N,N,N',N'-Tetramethyl-syn-3,4-pyrrolidinediamine
[0678] To a solution of phenylmethyl
syn-3,4-bis(dimethylamino)-1-pyrrolidinecarboxylate (911.4 mg,
3.128 mmol) in MeOH (30 mL) was added 10% Pd/C (50% water, 270 mg).
The mixture was hydrogenated under balloon pressure for 1 h, and
was then filtered and the resulting solution was concentrated in
vacuo to provide crude racemic
N,N,N',N'-tetramethyl-syn-3,4-pyrrolidinediamine (516.0 mg,
>100% crude yield) as a bright yellow oil. LCMS: (M+H).sup.+:
158.1.
Part D
1-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,N',N'-tetramethyl-syn--
3,4-pyrrolidinediamine
[0679] To a solution of 2,4,6-trichloro-5-fluoropyrimidine (330 mg,
1.638 mmol) in DCM (5 mL) was added N,N-diisopropylethylamine
(0.342 mL, 1.963 mmol) and
N,N,N',N'-tetramethyl-syn-3,4-pyrrolidinediamine (257.4 mg, 1.637
mmol). The solution was stirred for 4 h at room temperature, and
was then concentrated in vacuo. To a solution of the residue in
MeOH (3 mL) was added hydrazine hydrate (0.5 mL). The solution was
stirred and heated at 70.degree. C. for 3 h, and was then cooled to
room temperature. The solution was purified directly by Gilson RPLC
(7% MeCN to 30% MeCN in water, 8 min gradient) to afford first
racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,N',N'-tetramethyl-syn-
-3,4-pyrrolidinediamine (118.3 mg) as an orange solid followed by
racemic
4-[syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-6-chloro-5-fluoro-2(1H)-pyr-
imidinone hydrazone (194.6 mg, 60% combined yield for 2 steps) as
an orange oil.
Part E
[(2R)-3-(2-{6-[Syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-2-chloro-5-fluor-
o-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2-
H-pyran-2-yloxy)formamide
[0680] To a solution of racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,N',N'-tetramethyl-syn-
-3,4-pyrrolidinediamine (116.3 mg, 0.366 mmol) in DMF (3 mL) was
added
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid, N,N-diisoproylethylamine salt (121.2 mg, 0.283 mmol),
N-methylmorpholine (0.160 ml, 1.455 mmol),
1-hydroxy-7-azabenzotriazole (46 mg, 0.337 mmol), and EDC (65 mg,
0.339 mmol). The solution was stirred overnight and then purified
directly by Gilson RPLC to afford
[(2R)-3-(2-{6-[syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-2-chloro-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro--
2H-pyran-2-yloxy)formamide (133.4 mg, 78% yield) as a yellow oil.
LCMS: (M+H).sup.+: 599.4.
Part F
[(2R)-3-(2-{6-[Syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-2-chloro-5-fluor-
o-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformam-
ide
[0681] A solution of
[(2R)-3-(2-{6-[syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-2-chloro-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide (133.4
mg, 0.223 mmol) in 4:1 HOAc--H.sub.2O (5 mL) was stirred at
30.degree. C. for 18 h. The solution was concentrated in vacuo, and
diluted with DCM (100 mL). The solution was washed with sat. aq.
NaHCO.sub.3 (50 mL), and the organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo. The residue
was purified by Gilson RPLC, and then crystallized from EtOAc
hexanes to provide
[(2R)-3-(2-{6-[syn-3,4-bis(dimethylamino)-1-pyrrolidinyl]-2-chloro-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyforma-
mide as a light yellow solid. LCMS: (M+H).sup.+: 515.2.
Example 114
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(cis)-3-hydroxy-4-methyl-1-p-
yrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamid-
e (Single Unknown Diastereomer)
##STR00136##
[0682] Part A
Phenylmethyl(trans)-3-hydroxy-4-methyl-1-pyrrolidinecarboxylate
[0683] To a stirred suspension of CuI (10.2 g, 54 mmol) in ether
(120 mL) at -10.degree. C. was added dropwise MeLi (73 mL, 109
mmol, 1.5 M in ether) ensuring that the temperature remained below
-5.degree. C. The resulting solution was stirred at -10.degree. C.
for 20 min and a solution of phenylmethyl
6-oxa-3-azabicyclo[3.1.0]hexane-3-carboxylate (Example 113) (5 g,
23 mmol) in ether (50 mL) was added, maintaining the temperature
below -2.degree. C. The reaction was stirred at -10.degree. C. for
1 hour after which time it was quenched with water and partitioned
with DCM. A standard work up yielded
phenylmethyl(trans)-3-hydroxy-4-methyl-1-pyrrolidinecarboxylate,
which was purified and subjected to chiral chromatography,
producing two enantiopure compounds of undetermined absolute
stereochemistry. (Yield of E.sub.1=1.55 g, yield of E.sub.2=1.58
g).
Part B
Phenylmethyl(cis)-3-methyl-4-{[(4-nitrophenyl)carbonyl]oxy}-1-pyrrolidinec-
arboxylate
[0684] To a solution of enantiopure
phenylmethyl(trans)-3-hydroxy-4-methyl-1-pyrrolidinecarboxylate
(E1) (1 g, 4.25 mmol) in THF (21 mL) was added 4-nitrobenzoic acid
(1.42 g, 8.5 mmol), triphenylphosphine (2.23 g, 8.5 mmol) and DIAD
(1.7 mL, 8.5 mmol). The resulting solution was stirred overnight.
Removal of the solvent under reduced pressure yielded the crude
product which was purified by RP-HPLC yielding
phenylmethyl(cis)-3-methyl-4-{[(4-nitrophenyl)carbonyl]oxy}-1-pyrrolidine-
carboxylate (1.30 g, 79%). LCMS: (M+H).sup.+: 385.0 (single unknown
enantiomer).
Part C
(cis)-4-Methyl-3-pyrrolidinol
[0685] 1 M NaOH (aq) (13 mL) was added dropwise to a solution of
phenylmethyl(cis)-3-methyl-4-{[(4-nitrophenyl)carbonyl]oxy}-1-pyrrolidine-
carboxylate (1.30 g, 3.4 mmol) in THF (13 mL) at 0.degree. C. and
the reaction was stirred overnight, allowing the ice bath to
expire. Approximately half the reaction volume was removed under
reduced pressure and chloroform was added. The phases were
separated and the organic phase was washed with brine, dried over
sodium sulfate and concentrated to yield the crude alcohol. This
material was immediately dissolved in degassed MeOH and Pd/C (100
mg) was added. The reaction was stirred under a hydrogen balloon
for 3.5 hours, the catalyst was removed by filtration and the
solvents were removed by evaporation under reduced pressure to
yield (cis)-4-methyl-3-pyrrolidinol (390 mg, quantitative yield).
LCMS: (M+H).sup.+: 102.2 (single unknown enantiomer).
Part D
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(3S,4S)-3-hydroxy-4-methyl-1-pyrrolidinyl]-2-me-
thyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0686]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(cis)-3-hydroxy-4-met-
hyl-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyf-
ormamide was prepared as a single diastereoisomer (stereochemistry
around the pyrrolidine ring is arbitrarily assigned) according to
General Procedure A, utilizing (cis)-4-methyl-3-pyrrolidinol in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 439.2.
Example 115
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidiny-
l]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00137##
[0687] (3S)-4,4-Dimethyl-3-pyrrolidinol hydrochloride
[0688] To a solution of
(3S)-4,4-dimethyl-1-(phenylmethyl)-3-pyrrolidinol (J. Med. Chem.
1992, 35, 4205-4213) (0.7738 g, 3.769 mmol) in MeOH (38 mL) was
added 1 N aq. HCl (3.8 mL, 3.8 mmol) and 10% Pd/C (50% water, 230
mg). The mixture was hydrogenated under balloon pressure for 18 h,
and was then filtered through a 0.2 .mu.m filter tip syringe. The
resulting solution was concentrated in vacuo and azeotroped with
MeOH (2.times.50 mL) to afford (3S)-4,4-dimethyl-3-pyrrolidinol
hydrochloride (0.5267 g, 93% yield) as a light orange solid. LCMS:
(M+H).sup.+: 116.1.
Part B
(3S)-1-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-4,4-dimethyl-3-pyrrol-
idinol
[0689] To a solution of 2,4,6-trichloro-5-fluoropyrimidine (0.3362
g, 1.669 mmol) in DCM (6 mL) was added
(3S)-4,4-dimethyl-3-pyrrolidinol hydrochloride (0.2530 g, 1.691
mmol) and N,N-diisopropylethylamine (0.640 mL, 3.674 mmol). The
solution was stirred for 2 h, and was then concentrated in vacuo.
To a solution of the residue in DMSO (4 mL) was added hydrazine
hydrate (0.6 mL), and the solution was stirred overnight. The
solution was then purified directly by Gilson RPLC to give first
(3S)-1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-4,4-dimethyl-3-pyrro-
lidinol (0.1464 g, 32% yield) as an orange solid, LCMS:
(M+H).sup.+: 276.0, followed by
4-chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidinyl]-2(1H)-py-
rimidinone hydrazone (0.2149 g, 47% yield) as a light pink
solid.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidiny-
l]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
[0690] To a solution of
(3S)-1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-4,4-dimethyl-3-pyrro-
lidinol (0.131 g, 0.475 mmol) in DMF (3 mL) was added
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.1181 g, 0.395 mmol), N-methylmorpholine (0.220 ml,
2.001 mmol), 1-hydroxy-7-azabenzotriazole (64 mg, 0.470 mmol), and
EDC (91 mg, 0.475 mmol). The solution was stirred overnight and
then purified directly by Gilson RPLC to afford
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidin-
yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-
-2H-pyran-2-yloxy)formamide (0.1294 g, 59% yield) as an orange oil.
LCMS: (M+H).sup.+: 557.3.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidiny-
l]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[0691] A solution of
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidin-
yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-
-2H-pyran-2-yloxy)formamide (0.1294 g, 0.232 mmol) in 4:1
HOAc-water (5 mL) was heated at 30.degree. C. and stirred
overnight. The solution was cooled to room temperature,
concentrated in vacuo, and purified directly by Gilson RPLC to give
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidin-
yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide (69.1 mg, 63% yield) as a
yellow solid. LCMS: (M+H).sup.+: 473.2.
Example 116
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl--
1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyforma-
mide
##STR00138##
[0692] Part A
(3S)-1-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-4,4-dimethyl-3-pyrrol-
idinol
[0693] To a solution of (3S)-4,4-dimethyl-3-pyrrolidinol
hydrochloride (Example 115) (0.1370 g, 0.916 mmol) in MeOH (3 mL)
was added 4,6-dichloro-5-fluoro-2-methylpyrimidine (0.1646 g, 0.909
mmol) and N,N-diisopropylethylamine (0.350 mL, 2.009 mmol). The
solution was heated at 120.degree. C. under microwave irradiation
for 30 min, and then concentrated in vacuo. To a solution of the
residue in DMSO (3 mL) was added hydrazine hydrate (0.5 mL), and
the solution was heated at 50.degree. C. and stirred for 24 h. The
solution was then purified directly by Gilson RPLC to provide
(3S)-1-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-4,4-dimethyl-3-pyrro-
lidinol (0.1560 g, 67% yield) as a light yellow foam. LCMS:
(M+H).sup.+: 256.2.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl--
1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmeth-
yl)oxy]formamide
[0694] To a solution of
(3S)-1-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-4,4-dimethyl-3-pyrro-
lidinol (0.125 g, 0.490 mmol) in DMF (3 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (0.1246 g, 0.408 mmol), N-methylmorpholine (0.225 ml, 2.046
mmol), 1-hydroxy-7-azabenzotriazole (67 mg, 0.492 mmol), and EDC
(94 mg, 0.490 mmol). The mixture was stirred overnight and then
purified directly by Gilson RPLC to give
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-
-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmet-
hyl)oxy]formamide (0.1606 g, 73% yield) as a purple oil. LCMS:
(M+H).sup.+: 543.3.
Part C
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-1-pyrrolidinyl]-2-m-
ethyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0695] To a solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-
-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmet-
hyl)oxy]formamide (0.1606 g, 0.296 mmol) in MeOH (5 mL) was added
10% Pd/C (50% water, 48 mg). The mixture was hydrogenated under
balloon pressure for 1 h, and was then filtered. The solution was
concentrated in vacuo and the residue was crystallized from
EtOAc-hexanes to afford
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(4S)-4-hydroxy-3,3-dimethyl-
-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyform-
amide (0.1205 g, 90% yield) as a light pink solid. LCMS:
(M+H).sup.+: 453.3.
Example 117
((2R)-2-(Cyclopentyl
methyl)-3-{2-[6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-2-(fluoromethy-
l)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00139##
[0697]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(2R)-2,4-dimethyl-1-piperaziny-
l]-5-fluoro-2-(fluoromethyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyf-
ormamide was prepared according to General Procedure A, utilizing
(3R)-1,3-dimethylpiperazine, dihydrochloride (Example 63) in place
of pyrrolidine, and
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine in place of
4,6-dichloro-5-fluoro-2-methylpyrimidine in Part A. LCMS:
(M+H).sup.+: 470.2.
Example 118
[(2R)-3-(2-{2-Chloro-6-[(3R)-3-(dimethylamino)-1-piperidinyl]-5-fluoro-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00140##
[0698] Part A
(3R)--N,N-Dimethyl-3-piperidinamine
[0699] a) Commerically-available (R)-tert-butyl
3-aminopiperidine-1-carboxylate, hydrochloride salt (5.0 g, 21.1
mmol), sodium triacetoxyborohydride (11.2 g, 52.8 mmol), and
formaldehyde (37% in H.sub.2O, 0.5 mL, 63.4 mmol) were dissolved
and stirred in CH.sub.2Cl.sub.2 at 0.degree. C. The reaction
mixture was allowed to warm to room temperature and stirred for 3
h. After this time, the reaction mixture was diluted with
additional CH.sub.2Cl.sub.2 (200 mL) and was washed with 1N NaOH
(100 mL). The organic layer was separated, dried
(Na.sub.2SO.sub.4), and evaporated to provide 1,1-dimethylethyl
(3R)-3-(dimethylamino)-1-piperidinecarboxylate (5.0 g).
[0700] b) 1,1-Dimethylethyl
(3R)-3-(dimethylamino)-1-piperidinecarboxylate (5.0 g crude, 21.12
assumed mmol) was dissolved and stirred in a mixture of
CH.sub.2Cl.sub.2 (10 mL) and 4M HCl in dioxane (21 mL, 4 eqv.) A
white precipitate formed. The reaction appeared to stall at
approximately 70% completion, and therefore another 21 mL of 4M HCl
in dioxane was added to the reaction mixture. After 4 h at room
temperature, the solvent was evaporated, providing
(3R)--N,N-dimethyl-3-piperidinamine, dihydrochloride as a white
solid (3.5 g, 89% for two steps).
Part B
[(2R)-3-(2-{2-Chloro-6-[(3R)-3-(dimethylamino)-1-piperidinyl]-5-fluoro-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0701]
[(2R)-3-(2-{2-Chloro-6-[(3R)-3-(dimethylamino)-1-piperidinyl]-5-flu-
oro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide was prepared according to General Procedure D, utilizing
(3R)--N,N-dimethyl-3-piperidinamine, dihydrochloride in place of
N-methylpiperazine, and using 2 equivalents of DIPEA in Part A.
LCMS: (M+H).sup.+: 486.3.
Example 119
N-[(2R)-3-[2-(6-{[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino}-5-fluoro-
-2-methyl-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]-N-hy-
droxyformamide
##STR00141##
[0702] Part A
4-[(Methylamino)methyl]-1,3-thiazol-2-amine
[0703] 4-(Chloromethyl)-1,3-thiazol-2-amine (490 mg, 2.65 mmol) was
stirred in 40% aqueous methylamine (25 ml) overnight. The reaction
mixture was evaporated. The residue was diluted with 95:5
dichloromethane/methanol (25 ml), was dried over sodium sulfate,
was filtered and was evaporated to provide
4-[(methylamino)methyl]-1,3-thiazol-2-amine that was used without
purification. LCMS: (M+H).sup.+: 144.0.
Part B
N-[(2-Amino-1,3-thiazol-4-yl)methyl]-6-chloro-5-fluoro-2-methyl-4-pyrimidi-
namine
[0704] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (480 mg, 2.65 mmol)
was dissolved in 20 mL of THF and stirred at room temperature.
(4-[(Methylamino)methyl]-1,3-thiazol-2-amine (2.65 mmol,
theoretical) was added, followed by triethylamine (400 .mu.L, 2.92
mmol). The resulting reaction mixture was stirred overnight and
evaporated. The residue was stirred in water and the solid
precipitate was collected by filtration and was dried in vacuo to
provide
N-[(2-amino-1,3-thiazol-4-yl)methyl]-6-chloro-5-fluoro-2-methyl-4-pyrimid-
inamine (450 mg, 59%) that was used without further purification.
LCMS: (M+H).sup.+: 288.1.
Part C
6-{[(2-Amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-4-hydrazino-2-methylp-
yrimidine
[0705]
N-[(2-Amino-1,3-thiazol-4-yl)methyl]-6-chloro-5-fluoro-2-methyl-4-p-
yrimidinamine (450 mg, 1.56 mmol) was dissolved in 5 ml of DMSO and
5 ml of hydrazine monohydrate was added. The mixture was stirred
overnight and was purified by RP-HPLC to provide
6-{[(2-amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-4-hydrazino-2-methyl-
pyrimidine (125 mg, 28%). LCMS: (M+H).sup.+: 284.1.
Part D
[(2R)-3-[2-(6-{[(2-Amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-2-methyl--
4-pyrimidinyl)hydrazino]-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide
[0706]
6-{[(2-Amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-4-hydrazino-2--
methylpyrimidine (125 mg, 0.44 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (130 mg, 0.44 mmol), and HOAt (65 mg, 0.48 mmol) were
dissolved in 4 mL of DMF. NMM (0.15 mL, 1.32 mmol) was added,
followed by EDC (96 mg, 0.48 mmol). After stirring overnight at
room temperature, the reaction mixture was purified by RP-HPLC to
provide
[(2R)-3-[2-(6-{[(2-amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-2-methyl-
-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-
-pyran-2-yloxy)formamide (114 mg, 46%). LCMS: (M+H).sup.+:
565.3.
Part E
[(2R)-3-[2-(6-{[(2-Amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-2-methyl--
4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e
[0707]
[(2R)-3-[2-(6-{[(2-Amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-2--
methyl-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl](tetrahy-
dro-2H-pyran-2-yloxy)formamide (114 mg, 0.2 mmol) in 4:1 AcOH:water
(5 mL) was stirred at room temperature overnight. The solvents were
removed in vacuo, and the resulting crude product was purified by
RP-HPLC to provide
[(2R)-3-[2-(6-{[(2-amino-1,3-thiazol-4-yl)methyl]amino}-5-fluoro-2-methyl-
-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformami-
de (18 mg, 18%). LCMS: (M+H).sup.+: 481.2.
Example 120
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(cis)-3-(dimethylamino)-4-methyl-1-py-
rrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyf-
ormamide (Single Unknown Diastereomer)
##STR00142##
[0708] Part A
(trans)-4-Methyl-3-pyrrolidinol
[0709]
Phenylmethyl(trans)-3-hydroxy-4-methyl-1-pyrrolidinecarboxylate
(E1, Example 114, Part A) (100 mg, 0.43 mmol) and 10% Pd/C (20 mg)
were suspended in methanol (7 mL) and stirred under a hydrogen
balloon for 19 h. Filtration of the catalyst and evaporation of the
solvent provided (trans)-4-methyl-3-pyrrolidinol (single unknown
enantiomer).
Part B
1,1-Dimethylethyl(trans)-3-{[(4-chlorophenyl)sulfonyl]oxy}-4-methyl-1-pyrr-
olidinecarboxylate
[0710] To a solution of (trans)-4-methyl-3-pyrrolidinol (single
unknown enantiomer) (707 mg, 7 mmol) in a mixture of MeOH (10 mL),
DCM (10 mL) and saturated aqueous potassium carbonate (20 mL) was
added di-tert-butyl-dicarbonate (1.84 g, 8.42 mmol), and the
resulting solution was stirred overnight. Water was added followed
by chloroform and the phases were separated. The organic layer was
washed with brine, dried over sodium sulfate, filtered and
evaporated in vacuo to yield the crude Boc-protected alcohol (1.37
g). This was immediately dissolved in pyridine (10 mL) and
p-toluenesulfonyl chloride (2.1 g, 11 mmol) was added. The reaction
was stirred overnight, cooled to 0.degree. C. and 1 M HCl was
added. After stirring for 10 min at reduced temperature chloroform
was added and the phases were separated. The aqueous phase was
extracted twice with chloroform, and the combined organics were
washed with brine, dried over sodium sulfate, filtered and
concentrated in vacuo. This yielded
1,1-dimethylethyl(trans)-3-{[(4-chlorophenyl)sulfonyl]oxy}-4-methyl-1-pyr-
rolidinecarboxylate. LCMS: (M+Na).sup.+: 378.1 (single unknown
enantiomer).
Part C
1,1-Dimethylethyl(cis)-3-amino-4-methyl-1-pyrrolidinecarboxylate
[0711] To a stirred solution of
1,1-dimethylethyl(trans)-3-{[(4-chlorophenyl)sulfonyl]oxy}-4-methyl-1-pyr-
rolidinecarboxylate 2.3 g, 6.5 mmol) in DMF (23 mL) was added
NaN.sub.3 (4.2 g, 65 mmol). The resulting solution was stirred at
60.degree. C. until LCMS showed the reaction to be complete. Upon
cooling to r.t., the reaction was filtered to remove an insoluble
precipitate and the solvent was removed in vacuo. The residual
material was dissolved in EtOAc, washed with water, dried over
sodium sulfate and concentrated in vacuo yielding 1.26 g of the
crude intermediate. This crude azide was immediately dissolved in
degassed MeOH (20 mL) and 10% Pd/C was added (126 mg). The
resulting suspension was stirred under a hydrogen balloon
overnight, after which time the catalyst was removed by filtration
and the solvent was evaporated under reduced pressure. This yielded
1,1-dimethylethyl(cis)-3-amino-4-methyl-1-pyrrolidinecarboxylate
(1.02 g, 70%). LCMS: (M-.sup.tBut).sup.+: 145.1 (single unknown
enantiomer).
Part D
(cis)-N,N,4-Trimethyl-3-pyrrolidinamine.HCl
[0712]
1,1-Dimethylethyl(cis)-3-amino-4-methyl-1-pyrrolidinecarboxylate
(1.0 g, 5.0 mmol) was dissolved in THF (25 mL) and formaldehyde
(4.1 mL, 50 mmol, 37% in water) was added. The resulting mixture
was stirred for 40 min and sodium triacetoxyborohydride (14.8 g,
50.0 mmol) was added. The reaction was stirred for 72 hours and
then quenched by the addition of 1 M NaOH (aq). Ether was added and
the phases were separated. The combined organics were dried over
sodium sulfate, filtered and evaporated to provide the intermediate
dimethylated amine (1.65 g). This was dissolved in HCl (10 mL, 40
mmol, 4M in dioxane) and stirred overnight. Evaporation of the
solvent and excess acid yielded
(cis)-N,N,4-trimethyl-3-pyrrolidinamine.HCl (1.42 g). (single
unknown enantiomer).
Part E
[0713]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(3R,4R)-3-(dimethylamino)-4-me-
thyl-1-pyrrolidinyl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl-
]hydroxyformamide was prepared as a single unknown diastereoisomer
according to General Procedure B, utilizing
(cis)-N,N,4-trimethyl-3-pyrrolidinamine.HCl in place of azetidine
in Part A. LCMS: (M+H).sup.+: 480.3.
Example 121
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3S)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00143##
[0715]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3S)-3,4-dimethyl-1-piperaziny-
l]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide was prepared according to General Procedure C, utilizing
(2S)-1,2-dimethylpiperazine (Example 40) in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+484.4.
Example 122
[(2R)-3-(2-{2-Chloro-6-[(cis)-3-(dimethylamino)-4-methyl-1-pyrrolidinyl]-5-
-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxy-
formamide (Single Unknown Diastereomer)
##STR00144##
[0717]
[(2R)-3-(2-{2-Chloro-6-[(cis)-3-(dimethylamino)-4-methyl-1-pyrrolid-
inyl]-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
hydroxyformamide was prepared as a single unknown diastereoisomer
according to General Procedure D, utilizing enantiopure
(cis)-N,N,4-trimethyl-3-pyrrolidinamine (Example 120) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 486.1/483.3.
Example 123
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-
-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyform-
amide (Single Unknown Diastereomer)
##STR00145##
[0718] Part A
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-4-
-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)o-
xy]formamide (Diastereomer 1)
[0719]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin--
2-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylm-
ethyl)oxy]formamide (diastereomeric mixture) was prepared according
to Part A and Part B of General Procedure G, utilizing
commercially-available (+/-)-1,4-diazabicyclo[4.4.0]decane in place
of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide
in Part A.
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-y-
l)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmeth-
yl)oxy]formamide (Diastereomer 1) was separated by chiral
chromatography (Chiralpak AD-H 21.2.times.250 mm). LCMS:
(M+H).sup.+: 588.3.
Part B
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-
-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyform-
amide (Single Unknown Diastereomer)
[0720]
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazi-
n-2-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydr-
oxyformamide (single unknown diastereomer) was prepared according
to Part C of General Procedure G, utilizing
[(2R)-3-{2-[2-chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)--
4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)-
oxy]formamide (Diastereomer 1) in place of
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]-
hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(ph-
enylmethyl)oxy]formamide in Part C. LCMS: (M+H).sup.+: 498.3.
Example 124
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-
-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyform-
amide (Single Unknown Diastereomer)
##STR00146##
[0721] Part A
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-4-
-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)o-
xy]formamide (Diastereomer 2)
[0722]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin--
2-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylm-
ethyl)oxy]formamide (diastereomeric mixture) was prepared according
to Part A and Part B General Procedure G, utilizing
commercially-available (+/-)-1,4-diazabicyclo[4.4.0]decane in place
of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide
in Part A.
[(2R)-3-{2-[2-chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-y-
l)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmeth-
yl)oxy]formamide (Diastereomer 2) was separated by chiral
chromatography (Chiralpak AD-H 21.2.times.250 mm). LCMS:
(M+H).sup.+: 588.3.
Part B
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-
-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyform-
amide (Single Unknown Diastereomer)
[0723]
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydro-2H-pyrido[1,2-a]pyrazi-
n-2-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide (single unknown
diastereomer) was prepared according to Part C of General Procedure
G, utilizing [(2R)-3-{2-[2-chloro-5-fluoro-6-(octa
hydro-2H-pyrido[1,2-a]pyrazin-2-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopent-
yl methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (Diastereomer
2) in place of
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1S,4S)-5-methyl-2,5-diaza
bicyclo[2.2.1]hept-2-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-
-oxopropyl][(phenylmethyl)oxy]formamide in Part C. LCMS:
(M+H).sup.+: 498.3.
Example 125
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00147##
[0725]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3,4-dimethyl-1-piperaziny-
l]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide was prepared according to General Procedure C, utilizing
(2R)-1,2-dimethylpiperazine (Example 39) in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+484.5.
Example 126
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-(fluoromethyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamid-
e
##STR00148##
[0727]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(2S)-2,4-dimethyl-1-piperaziny-
l]-5-fluoro-2-(fluoromethyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyf-
ormamide was prepared according to General Procedure A, utilizing
(3S)-1,3-dimethylpiperazine, dihydrochloride (Example 40) in place
of pyrrolidine, and
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine in place of
4,6-dichloro-5-fluoro-2-methylpyrimidine in Part A. LCMS:
(M+H).sup.+: 470.2.
Example 127
[(2R)-3-{2-[2-Chloro-6-(cyclopropylamino)-5-fluoro-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00149##
[0729]
[(2R)-3-{2-[2-Chloro-6-(cyclopropylamino)-5-fluoro-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure D, utilizing
commercially-available cyclopropylamine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 415.2.
Example 128
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hep-
t-5-yl)-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00150##
[0730] Part A
Ethyl 1-acetylcyclopropanecarboxylate
[0731] To a stirred solution of ethyl 3-oxobutanoate (10 mL, 78.45
mmol) and 1,2-dibromoethane (6.5 mL, 78.45 mmol) in 150 mL of DMF
was added potassium carbonate (22.7 g, 164.74 mmol). The resulting
reaction mixture was stirred at room temperature for 2 days. The
solution was diluted with 300 mL of water. The product was
extracted into diethyl ether (2.times.200 mL), and the combined
organic extracts were washed with water (1.times.1000 mL), and
dried (MgSO.sub.4). Filtration and atmospheric distillation of the
ether provided the crude product, which was distilled under reduced
pressure (10 mBar) to provide ethyl 1-acetylcyclopropanecarboxylate
(6.4273 g, 52%). LCMS: (M+H).sup.+: not detected.
Part B
5-(Phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
[0732] Ethyl 1-acetylcyclopropanecarboxylate (6.4273 g, 41.153
mmol) was dissolved in 46 mL of EtOH. Bromine (2.32 mL, 45.2683
mmol) was slowly added to the solution. The resulting reaction
mixture was stirred for 2 h, then concentrated in vacuo. The crude
residue was dissolved in 46 mL of EtOH and the mixture was cooled
to 0.degree. C. with an ice water bath. To this solution was slowly
added benzyl amine (11.2 mL 102.8825 mmol) and the reaction mixture
was stirred at room temperature overnight, then concentrated in
vacuo to dryness. The residue was dissolved in CH.sub.2Cl.sub.2
(200 mL) and 1N aq HCl (100 mL). The phases were separated, and the
aqueous phase was extracted with CH.sub.2Cl.sub.2 (100 mL), the
combined organic phase was dried over anhydrous MgSO.sub.4,
filtered, and concentrated in vacuo. Purification by chromatography
on silica gel using an eluting system of hexane/EtOAc (60:40)
provided 5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione (2.4283
g 27%) as an orange solid. LCMS: (M+H).sup.+: not detected.
Part C
5-(Phenylmethyl)-5-azaspiro[2.4]heptan-7-ol
[0733] 5-(Phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione (997.4 mg,
4.63 mmol) was dissolved in 46 mL of THF and LiAlH.sub.4 (997 mg)
was added portion wise with stirring. The mixture was heated to
65.degree. C. for 5 hours, then cooled to 0.degree. C. The reaction
was quenched with Na.sub.2SO.sub.4H.sub.2O and was stirred at room
temperature overnight. The contents were filtered through Celite,
and the Celite pad was washed with EtOAc. The Celite filter cake
was suspended in EtOAc (200 mL) and boiled for 5 min. The
suspension was filtered, and the combined organic filtrates were
then concentrated in vacuo to provide
5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-ol (983 mg, >100%).
LCMS: (M+H).sup.+: 204.1
Part D
5-Azaspiro[2.4]heptan-7-ol hydrochloride
[0734] 5-(Phenylmethyl)-5-azaspiro[2.4]heptan-7-ol (assumed 941.9
mg, 4.63 mmol) was dissolved in a solution of 4.6 mL of 1N aq HCl
in 40 mL of MeOH, degassed and placed under argon. 10% Pd/C (280
mg) was added, and the contents were thoroughly degassed and placed
under a hydrogen balloon overnight. The contents were then degassed
and filtered through Celite, and the Celite pad was washed with
MeOH. The resulting filtrate was concentrated in vacuo and
azeotroped with MeOH (3.times.40 mL) to provide the pure
5-azaspiro[2.4]heptan-7-ol hydrochloride (685 mg, 99%). LCMS:
(M+H).sup.+: not detected.
Part E
5-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-5-azaspiro[2.4]heptan-7-ol
[0735] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (110 mg, 0.636
mmol) was dissolved in 3 mL of MeOH then added
5-azaspiro[2.4]heptan-7-ol hydrochloride (685 mg, 0.668 mmol) was
added, followed by DIPEA (243 .mu.L, 1.4 mmol). The resulting
reaction mixture was microwaved at 120.degree. C. for 30 min, the
voliailes were concentrated in vacuo, and the residue was dissolved
in a mixture of DMSO (4 mL) and MeOH (1 mL). Then hydrazine
monohydrate was added (600 .mu.L), and the contents were heated to
60.degree. C. overnight. The reaction mixture was then cooled to
room temperature and purified by RP-HPLC to provide
5-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-5-azaspiro[2.4]heptan-7-o-
l (82 mg, 51%). LCMS: (M+H).sup.+: 254.
Part F
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hep-
t-5-yl)-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)(tetrahydro-2H-pyran-
-2-yloxy)formamide
[0736]
5-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-5-azaspiro[2.4]hept-
an-7-ol (82 mg, 0.324 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (115 mg, 0.27 mmol), and HOAt (44 mg, 0.324 mmol) were
dissolved in 2 mL of DMF. NMM (0.089 mL, 0.81 mmol) was added,
followed by EDC (62 mg, 0.324 mmol). After stirring overnight at
room temperature, the reaction mixture was purified by RP-HPLC to
provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(7S)-7-hydroxy-5-azaspiro[2-
.4]hept-5-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-
-pyran-2-yloxy)formamide (91 mg, 63%). LCMS: (M+H).sup.+:
535.3.
Part G
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hep-
t-5-yl)-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
[0737]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(7S)-7-hydroxy-5-azas-
piro[2.4]hept-5-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahy-
dro-2H-pyran-2-yloxy)formamide (91 mg, 0.202 mmol) was dissolved in
a mixture of AcOH/H.sub.2O (10 mL, 4:1) and stirred at RT until
LCMS indicated completion of the deprotection (overnight). The
reaction mixture was concentrated to dryness under vacuum and was
purified by RP-HPLC to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]he-
pt-5-yl)-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
(25 mg, 27%). LCMS: (M+H).sup.+: 451.2.
Example 129
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[4-(dimethylamino)-3,3-dimethyl-1-pyrr-
olidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfo-
rmamide (Mixture of Diastereomers)
##STR00151##
[0738] Part A
(3R)-4,4-Dimethyl-3-pyrrolidinol hydrochloride
[0739] To a solution of
(3R)-4,4-dimethyl-1-(phenylmethyl)-3-pyrrolidinol (J. Med. Chem.
1992, 35, 4205-4213) (1.8634 g, 9.076 mmol) in MeOH (45 mL) was
added 1 N aq. HCl (9.1 mL, 9.1 mmol) and 10% Pd/C (50% water, 375
mg). The mixture was hydrogenated under balloon pressure for 2
days, and was then filtered. The solution was concentrated in vacuo
and azeotroped with MeOH (4.times.20 mL) to give
(3R)-4,4-dimethyl-3-pyrrolidinol hydrochloride (1.2654 g, 93%
yield) as an amber solid. LCMS: (M+H).sup.+: 116.1.
Part B
Phenyl methyl
(4R)-4-hydroxy-3,3-dimethyl-1-pyrrolidinecarboxylate
[0740] To a mixture of (3R)-4,4-dimethyl-3-pyrrolidinol
hydrochloride (0.9920 g, 6.630 mmol) in 1:1 DCM-1 N aq. NaOH (33
mL) was added benzyl chloroformate (0.994 mL, 6.963 mmol). The
mixture was vigorously stirred overnight and then diluted with DCM
(100 mL). The phases were partitioned, and the organic phase was
dried over anhydrous MgSO.sub.4, filtered, and concentrated in
vacuo. The residue was then purified by silica gel chromatography
(40% EtOAc in hexanes) to afford phenylmethyl
(4R)-4-hydroxy-3,3-dimethyl-1-pyrrolidinecarboxylate (1.4654 g, 89%
yield) as a colorless oil. LCMS: (M+H).sup.+: 250.1.
Part C
Phenyl methyl 3,3-dimethyl-4-oxo-1-pyrrolidinecarboxylate
[0741] To a solution of phenylmethyl
(4R)-4-hydroxy-3,3-dimethyl-1-pyrrolidinecarboxylate (1.4088 g,
5.651 mmol) in MeCN (50 mL) was added N-methylmorpholine-N-oxide
(0.861 g, 7.350 mmol) and tetra-N-propylammonium perruthenate
(0.099 g, 0.282 mmol). The solution was stirred for 90 min,
concentrated in vacuo, and purified directly by silica gel
chromatography (20% EtOAc in hexanes) to give phenylmethyl
3,3-dimethyl-4-oxo-1-pyrrolidinecarboxylate (1.1321 g, 79%) as a
colorless oil. LCMS: (M+Na).sup.+: 270.4.
Part D
Phenyl methyl
(4Z)-3,3-dimethyl-4-[(methyloxy)imino]-1-pyrrolidinecarboxylate
[0742] To a solution of phenylmethyl
3,3-dimethyl-4-oxo-1-pyrrolidinecarboxylate (0.9135 g, 3.694 mmol)
in MeOH (37 mL) was added sodium acetate (0.606 g, 7.387 mmol) and
O-methylhydroxylamine hydrochloride (0.620 g, 7.397 mmol). The
solution was stirred for 3 h, and then concentrated in vacuo. The
residue was partitioned between DCM (100 mL), water (5 mL), and
sat. aq. NaHCO.sub.3 (30 mL). The organic phase was dried over
anhydrous MgSO.sub.4, filtered, and concentrated in vacuo to
provide phenylmethyl
(4Z)-3,3-dimethyl-4-[(methyloxy)imino]-1-pyrrolidinecarboxylate
(0.9124 g, 89% yield) as a pale yellow oil. LCMS: (M+H).sup.+:
277.0.
Part E
Phenylmethyl 4-amino-3,3-dimethyl-1-pyrrolidinecarboxylate
[0743] To a solution of phenylmethyl
(4Z)-3,3-dimethyl-4-[(methyloxy)imino]-1-pyrrolidinecarboxylate
(0.7126 g, 2.579 mmol) in THF (26 mL) was added borane-THF complex
(1.0 M in THF, 5.2 mL, 5.2 mmol). The solution was heated at
50.degree. C. and stirred for 2 h. The solution was then cooled to
room temperature and quenched by addition of 6 N aq. NaOH (2 mL).
The mixture was diluted with brine and extracted with Et.sub.2O
(3.times.100 mL). The combined organic phase was dried over
anhydrous MgSO.sub.4, filtered, and concentrated in vacuo. To a
solution of the residue in MeOH (20 mL) was added 50% aq.
NH.sub.2OH (5 mL), and the solution was heated at 60.degree. C. and
stirred overnight. The solution was then cooled to room temperature
and concentrated in vacuo. The residue was partitioned between DCM
(200 mL) and 1 N aq. NaOH (50 mL), and the organic phase was dried
over anhydrous MgSO.sub.4, filtered, and concentrated in vacuo to
give racemic phenylmethyl
4-amino-3,3-dimethyl-1-pyrrolidinecarboxylate (0.5899 g, 92% yield)
as a colorless oil. LCMS: (M+H).sup.+: 249.1.
Part F
Phenylmethyl
4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinecarboxylate
[0744] A solution of racemic phenylmethyl
4-amino-3,3-dimethyl-1-pyrrolidinecarboxylate (0.5899 g, 2.376
mmol) in formic acid (5 mL) and formalin (5 mL) was heated at
100.degree. C. and stirred for 2 h. The solution was then cooled to
room temperature and adjusted to pH 14 with 6 N. aq. NaOH. The
mixture was then extracted with Et.sub.2O (2.times.100 mL), and the
combined organic phase was dried over anhydrous Na.sub.2SO.sub.4,
filtered, and concentrated in vacuo. Two phases were observed to be
present, and the MeOH soluble portion was collected and
concentrated in vacuo to give crude, racemic phenylmethyl
4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinecarboxylate (0.6862 g,
>100% crude yield) as a colorless oil. LCMS: (M+H).sup.+:
277.2.
Part G
N,N,4,4-Tetramethyl-3-pyrrolidinamine
[0745] To a solution of racemic phenylmethyl
4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinecarboxylate (assumed
0.6565 g, 2.376 mmol) in MeOH was added 10% Pd/C (50% water, 195
mg). The mixture was hydrogenated under balloon pressure for 1 h,
and then filtered. The solution was concentrated in vacuo to afford
racemic N,N,4,4-tetramethyl-3-pyrrolidinamine (0.3479 g,
quantitative yield) as an almost colorless oil. LCMS: (M+H).sup.+:
143.1.
Part H
1-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyrr-
olidinamine
[0746] To a solution of N,N,4,4-tetramethyl-3-pyrrolidinamine
(0.0918 g, 0.645 mmol) in MeOH (3 mL) was added
4,6-dichloro-5-fluoro-2-methylpyrimidine (0.1088 g, 0.601 mmol) and
N,N-diisopropylethylamine (0.130 mL, 0.746 mmol). The solution was
heated at 120.degree. C. under microwave irradiation and stirred
for 30 min. The solution was then cooled to room temperature and
concentrated in vacuo. To a solution of the residue in 4:1
DMSO-MeOH (5 mL) was added hydrazine hydrate (0.5 mL). The solution
was heated at 65.degree. C. and stirred overnight. The solution was
then cooled to room temperature and diluted with DCM (50 mL). The
mixture was washed with sat. aq. NaHCO.sub.3 (20 mL), and the
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo. The residue was purified by Gilson RPLC
to afford racemic
1-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyr-
rolidinamine (0.0617 g, 36%) as a light yellow solid. LCMS:
(M+H).sup.+: 283.2.
Part I
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[4-(dimethylamino)-3,3-dimethyl-1-pyrr-
olidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylm-
ethyl)oxy]formamide
[0747] To a solution of racemic
1-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyr-
rolidinamine (0.0617 g, 0.219 mmol) in DMF (3 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (0.0637 g, 0.209 mmol), N-methylmorpholine (0.120 mL, 1.091
mmol), 1-hydroxy-7-azabenzotriazole (34 mg, 0.250 mmol), and EDC
(48 mg, 0.250 mmol). The solution was stirred overnight and then
purified directly by Gilson RPLC to give
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[4-(dimethylamino)-3,3-dimethyl-1-pyr-
rolidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (0.0775 g, 65% yield, mixture of
diastereomers) as a pale yellow oil. LCMS: (M+H).sup.+: 570.3.
Part J
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[4-(dimethylamino)-3,3-dimethyl-1-pyrr-
olidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfo-
rmamide
[0748] To a solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[4-(dimethylamino)-3,3-dimethyl-1-pyr-
rolidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (0.0775 g, 0.136 mmol) in MeOH (5 mL) was
added 10% Pd/C (50% water, 23 mg). The mixture was hydrogenated
under balloon pressure for 1 h, and then filtered. The solution was
concentrated in vacuo, and the residue was crystallized from
EtOAc-hexanes to afford
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[4-(dimethylamino)-3,3-dimethyl-1-pyr-
rolidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyf-
ormamide (0.0566 g, 87% yield, mixture of diastereomers) as an
off-white solid. LCMS: (M+H).sup.+: 480.1.
Example 130
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hept-5-yl)-4-pyr-
imidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
(Mixture of Diastereomers)
##STR00152##
[0749] Part A
5-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-5-azaspiro[2.4]heptan-7-ol
[0750] To a solution of 2,4,6-trichloro-5-fluoropyrimidine (611 mg,
3.036 mmol) in DCM (5 mL) was added DIPEA (1.163 mL, 6.679 mmol),
followed by 5-azaspiro[2.4]heptan-7-ol hydrochloride (Example 128)
(477 mg, 3.188 mmol). The solution was stirred at room temperature.
After 1 hour, the volatiles were concentrated in vacuo and the
residue was dissolved in a mixture of DMSO (4 mL) and MeOH (1 mL).
Hydrazine monohydrate was added (3.055 mL), and the contents were
stirred at RT overnight. The excess hydrazine was removed in vacuo,
and the remaining solution was purified via RP-HPLC to provide the
assumed
5-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-5-azaspiro[2.4]heptan-7-o-
l (first eluent, 167 mg), as well as the assumed
6-chloro-5-fluoro-2-hydrazino-4-(4-methyl-1-piperazinyl)pyrimidine
(second eluent, 312 mg). LCMS: (M+H).sup.+: 274.0.
Part B
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hept-5-yl)-4-pyr-
imidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-
-2-yloxy)formamide
[0751]
5-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-5-azaspiro[2.4]hept-
an-7-ol (167 mg 0.610 mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (217 mg, 0.508 mmol), and HOAt (83 mg, 0.610 mmol)
were dissolved in 5 mL of DMF. NMM (0.167 mL, 1.525 mmol) was
added, followed by EDC (117 mg, 0.6101 mmol). After stirring
overnight at room temperature, the reaction mixture was purified by
RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-6-[(7S)-7-hydroxy-5-azaspiro[2-
.4]hept-5-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-
-pyran-2-yloxy)formamide (223 mg, 79%). LCMS: (M+H).sup.+:
555.3.
Part C
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hept-5-yl)-4-pyr-
imidinyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[0752]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(7S)-7-hydroxy-5-azas-
piro[2.4]hept-5-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahy-
dro-2H-pyran-2-yloxy)formamide (223 mg, 0.401 mmol) was dissolved
in a mixture of AcOH/H.sub.2O (20 mL, 4:1) and stirred at RT until
LCMS indicated completion of the deprotection (overnight). The
reaction mixture was concentrated to dryness under vacuum, and was
purified by RP-HPLC to provide
[(2R)-3-{2-[2-chloro-5-fluoro-6-(7-hydroxy-5-azaspiro[2.4]hept-5-yl)-4-py-
rimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
(14 mg, 7%). LCMS: (M+H).sup.+: 471.1.
Example 131
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(2S)-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00153##
[0754]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(2S)-2,4-dimethyl-1-piperaziny-
l]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide was prepared according to General Procedure C, utilizing
(3S)-1,3-dimethylpiperazine (Example 64) in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+484.4.
Example 132
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3-(dimethylamino)-1-piperidinyl]-
-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyforma-
mide
##STR00154##
[0756]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[(3R)-3-(dimethylamino)-1-piper-
idinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydro-
xyformamide was prepared according to General Procedure C,
utilizing (3R)--N,N-dimethyl-3-piperidinamine (Example 118) in
place of azetidine hydrochloride in Part A. LCMS:
(M+H).sup.+498.5.
Example 133
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (Mixture of Diastereomers)
##STR00155##
[0757] Part A
1-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyrr-
olidinamine
[0758] To a solution of racemic
N,N,4,4-tetramethyl-3-pyrrolidinamine (0.1629 g, 1.145 mmol,
prepared according to Example 129) in DCM (4 mL) was added
2,4,6-trichloro-5-fluoropyrimidine (0.2219 g, 1.102 mmol) and
N,N-diisopropylethylamine (0.230 mL, 1.320 mmol). The solution was
stirred at room temperature for 3 h, and was then concentrated in
vacuo. To a solution of the residue in 4:1 DMSO-MeOH (5 mL) was
added hydrazine hydrate (0.5 mL), and the solution was stirred
overnight. The solution was diluted with DCM (50 mL) and washed
with sat. aq. NaHCO.sub.3 (20 mL). The organic phase was dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo.
The residue was purified by Gilson RPLC to give first racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyr-
rolidinamine (0.0546 g, 16% yield) as a yellow/orange oil, LCMS:
(M+H).sup.+: 303.1, followed by racemic
4-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-fluoro-2(1H)-
-pyrimidinone hydrazone (0.0859 g, 26% yield) as a yellow/orange
oil.
Part B
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahyd-
ro-2H-pyran-2-yloxy)formamide
[0759] To a solution of racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyr-
rolidinamine (0.0546 g, 0.180 mmol) in DMF (3 mL) was added
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid, N,N-diisoproylethylamine salt (71.1 mg, 0.166 mmol),
N-methylmorpholine (0.100 mL, 0.910 mmol),
1-hydroxy-7-azabenzotriazole (27 mg, 0.198 mmol), and EDC (38 mg,
0.198 mmol). The solution was stirred overnight and was then
purified directly by Gilson RPLC to give
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide (0.0681
g, 70% yield, mixture of diastereomers) as a light yellow oil.
LCMS: (M+H).sup.+: 584.4.
Part C
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
[0760] A solution of
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahy-
dro-2H-pyran-2-yloxy)formamide (0.0681 g, 0.117 mmol) in 4:1
HOAc-water (5 mL) was stirred for 56 h and then concentrated in
vacuo. A solution of the residue in DCM (100 mL) was washed with
sat. aq. NaHCO.sub.3 (30 mL), and the organic phase was dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo.
The residue was purified by Gilson RPLC and crystallized from
EtOAc-hexanes to provide
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide (0.0300 g, 51% yield, mixture of diastereomers) as a white
solid. LCMS: (M+H).sup.+: 500.3.
Example 134
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(methylthio)-6-(octahydro-2(1-
H)-isoquinolinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
(Mixture of Diastereomers)
##STR00156##
[0762]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-(methylthio)-6-(octahy-
dro-2(1H)-isoquinolinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyforma-
mide was prepared according to General Procedure C, utilizing
commerically-available decahydroisoquinoline in place of azetidine
hydrochloride in Part A. LCMS: (M+H).sup.+510.5.
Example 135
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[7-(dimethylamino)-5-azaspiro[2.4]hept-
-5-yl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformam-
ide (Mixture of Diastereomers)
##STR00157##
[0763] Part A
5-(2-Ethyl-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2.4-
]heptan-7-amine
[0764] To a solution of racemic
N,N-dimethyl-5-azaspiro[2.4]heptan-7-amine dihydrochloride (0.163
g, 0.765 mmol, prepared according to the procedures of Example 136)
in MeOH (3 mL) was added 4,6-dichloro-2-ethyl-5-fluoropyrimidine
(0.1358 g, 0.696 mmol). The solution was heated at 120.degree. C.
under microwave irradiation for 30 min, and was then concentrated
in vacuo. To a solution of the residue in 3:1 DMSO MeOH (4 mL) was
added hydrazine hydrate (0.5 mL). The solution was heated at
50.degree. C. and stirred for 3 days. The solution was then cooled
to room temperature and diluted with DCM (100 mL). The mixture was
washed with sat. aq. NaHCO.sub.3 (20 mL), and the aqueous phase was
back extracted with a fresh portion of DCM (50 mL). The combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo. The residue was purified by Gilson RPLC
to give racemic
5-(2-ethyl-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2.-
4]heptan-7-amine (0.0818 g, 40% yield) as a light yellow oil. LCMS:
(M+H).sup.+: 295.2.
Part B
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-2-ethyl-5-fl-
uoro-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenyl
methyl)oxy]formamide
[0765] To a solution of racemic
5-(2-ethyl-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2.-
4]heptan-7-amine (0.0818 g, 0.278 mmol) in DMF (3 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (0.0778 g, 0.255 mmol), N-methylmorpholine (0.140 mL, 1.273
mmol), 1-hydroxy-7-azabenzotriazole (42 mg, 0.309 mmol), and EDC
(59 mg, 0.308 mmol). The solution was stirred overnight and then
purified directly by Gilson RPLC to give
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[7-(dimethylamino)-5-azaspiro[2.4]hep-
t-5-yl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmeth-
yl)oxy]formamide (0.1058 g, 71% yield, mixture of diastereomers) as
a yellow oil. LCMS: (M+H).sup.+: 582.3.
Part C
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-2-ethyl-5-fl-
uoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[0766] To a solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[7-(dimethylamino)-5-azaspiro[2.4]hep-
t-5-yl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmeth-
yl)oxy]formamide (0.1058 g, 0.182 mmol) in MeOH (5 mL) was added
10% Pd/C (50% water, 32 mg). The mixture was hydrogenated under
balloon pressure for 1 h, and then filtered. The solution was
concentrated in vacuo, and the residue was azeotroped with EtOAc
and crystallized from EtOAc hexanes to afford
[(2R)-2-(cyclopentylmethyl)-3-(2-{6-[7-(dimethylamino)-5-azaspi-
ro[2.4]hept-5-yl]-2-ethyl-5-fluoro-4-pyrimidinyl}hydrazino)-3-oxopropyl]hy-
droxyformamide (0.0795 g, 89% yield, mixture of diastereomers) as a
white solid. LCMS: (M+H).sup.+: 492.3.
Example 136
[(2R)-3-(2-{2-Chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyforma-
mide (Mixture of Diastereomers)
##STR00158##
[0767] Part A
Ethyl 1-acetylcyclopropanecarboxylate
[0768] To a solution of ethyl 3-oxobutanoate (10.0 g, 76.84 mmol)
in DMF (150 mL) was added potassium carbonate (22.30 g, 161.3 mmol)
and 1,2-dibromoethane (6.62 mL, 76.82 mmol). The mixture was
stirred for 2 days, and then filtered. The solution was diluted
with water (300 mL), and extracted with Et.sub.2O (2.times.200 mL).
The combined organic phase was washed with a fresh portion of water
(100 mL), dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo. The residue was subjected to vacuum
distillation at ca. 10 mbar, and the fraction boiling at
100.degree. C. was collected to give ethyl
1-acetylcyclopropanecarboxylate (7.6482 g, 64%) as a colorless
oil.
Part B
5-(Phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
[0769] To a solution of ethyl 1-acetylcyclopropanecarboxylate
(7.6482 g, 48.97 mmol) in EtOH (54 mL) was slowly added bromine
(2.76 mL, 53.87 mmol) via syringe. The orange solution was stirred
for 2 h and then concentrated in vacuo. To a 0.degree. C. solution
of the residue in EtOH (54 mL) was added benzylamine (13.4 mL,
122.7 mmol) slowly via syringe, and the mixture was stirred and
warmed to room temperature overnight. The mixture was concentrated
in vacuo and partitioned between DCM (200 mL) and 1 N aq. HCl (100
mL). The aqueous phase was extracted with a fresh portion of DCM
(100 mL), and the combined organic phase was dried over anhydrous
MgSO.sub.4, filtered, and concentrated in vacuo. The residue was
purified by silica gel chromatography (40% EtOAc in hexanes) to
afford 5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione (2.7842 g,
26%) as a yellow solid. LCMS: (M+H).sup.+: 216.1.
Part C
(7Z)-5-(Phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
7-(O-methyloxime)
[0770] To a solution of
5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione (2.7802 g, 12.92
mmol) in MeOH (65 mL) was added sodium acetate (2.12 g, 25.8 mmol)
and O-methylhydroxylamine hydrochloride (2.16 g, 25.9 mmol). The
mixture was stirred overnight, and then diluted with DCM (100 mL).
The mixture was washed with sat. aq. NaHCO.sub.3, and the organic
phase was dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo to give crude
(7Z)-5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
7-(O-methyloxime) (3.4094 g, >100% crude yield) as a yellow oil.
LCMS: (M+H).sup.+: 245.1.
Part D
5-(Phenylmethyl)-5-azaspiro[2.4]heptan-7-amine
[0771] To a solution of
(7Z)-5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
7-(O-methyloxime) (assumed 3.1553 g, 12.92 mmol) in THF (130 mL)
was added lithium aluminum hydride (1.58 g, 41.63 mmol). The
mixture was heated at 65.degree. C. and stirred for 3 h. The
mixture was then cooled to 0.degree. C., and
Na.sub.2SO.sub.4.10H.sub.2O was added. The mixture was stirred
overnight, and then 1 N aq. NaOH (6 mL) was added. The mixture was
vigorously stirred for 30 min, and then extracted with DCM
(3.times.50 mL). The combined organic phase was dried over
anhydrous MgSO.sub.4, filtered, and concentrated in vacuo to
provide racemic crude
5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine (2.5355 g, 97% for 2
steps) as a light yellow oil. LCMS: (M+H).sup.+: 203.1.
Part E
N,N-Dimethyl-5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine
[0772] A solution of racemic
5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine (2.5355 g, 12.53
mmol) in formic acid (20 mL) and formalin (20 mL) was heated at
100.degree. C. and stirred for 3 h. The solution was then cooled to
0.degree. C. and adjusted to pH 14 with 6 N aq. NaOH. The resulting
suspension was extracted with Et.sub.2O (2.times.200 mL), and the
combined organic phase was dried over anhydrous Na.sub.2SO.sub.4.
The mixture was filtered, and the solution was concentrated in
vacuo. The MeOH soluble portion was then purified by Gilson RPLC to
give racemic
N,N-dimethyl-5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine (1.7643
g, 61%) as an orange oil. LCMS: (M+H).sup.+: 231.1.
Part F
N,N-Dimethyl-5-azaspiro[2.4]heptan-7-amine dihydrochloride
[0773] To a solution of racemic
N,N-dimethyl-5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine (0.8015
g, 3.479 mmol) in MeOH (18 mL) was added 1 N aq. HCl (6.96 mL, 6.96
mmol) and 10% Pd/C (50% water, 160 mg). The mixture was
hydrogenated under balloon pressure overnight and then filtered.
The solution was concentrated in vacuo to give crude racemic
N,N-dimethyl-5-azaspiro[2.4]heptan-7-amine dihydrochloride (0.8060
g, >100% crude yield). LCMS: (M+H).sup.+: 141.1.
Part G
5-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2.-
4]heptan-7-amine
[0774] To a mixture of racemic
N,N-dimethyl-5-azaspiro[2.4]heptan-7-amine dihydrochloride (0.4585
g, 2.151 mmol) in DCM (8 mL) was added
2,4,6-trichloro-5-fluoropyrimidine (0.3234 g, 1.606 mmol) and
N,N-diisopropylethylamine (1.25 mL, 7.18 mmol). The solution was
stirred for 3 h and then concentrated in vacuo. To a solution of
the residue in 3:1 DMSO-MeOH was added hydrazine hydrate (1 mL),
and the solution was stirred for 3 days, and then diluted with DCM
(100 mL). The mixture was washed with sat. aq. NaHCO.sub.3 (20 mL),
and the aqueous phase was extracted with a fresh portion of DCM (50
mL). The combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4 and filtered. The solution was concentrated in
vacuo and the residue was purified by Gilson RPLC to give first
racemic
5-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2-
.4]heptan-7-amine (0.0968 g, 20% yield) as an orange oil, LCMS:
(M+H).sup.+: 301.1, followed by racemic
4-chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-fluoro-2(1H)-py-
rimidinone hydrazone (0.1990 g, 41%) as an orange foam.
Part H
[(2R)-3-(2-{2-Chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro--
2H-pyran-2-yloxy)formamide
[0775] To a solution of racemic
5-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2-
.4]heptan-7-amine (0.0968 g, 0.322 mmol) in DMF (3 mL) was added
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid, N,N-diisoproylethylamine salt (122.1 mg, 0.285 mmol),
N-methylmorpholine (0.160 mL, 1.455 mmol),
1-hydroxy-7-azabenzotriazole (47 mg, 0.345 mmol), and EDC (66 mg,
0.344 mmol). The solution was stirred overnight and then purified
directly by Gilson RPLC to afford
[(2R)-3-(2-{2-chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-flu-
oro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-
-2H-pyran-2-yloxy)formamide (0.0961 g, 58%, mixture of
diastereomers) as a light purple oil. LCMS: (M+H).sup.+: 582.3.
Part I
[(2R)-3-(2-{2-Chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyforma-
mide
[0776] A solution of
[(2R)-3-(2-{2-chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-flu-
oro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide (0.0961
g, 0.165 mmol) in 4:1 HOAc water (5 mL) was stirred for 3 days. The
solution was concentrated in vacuo and diluted with DCM (100 mL).
The solution was washed with sat. aq. NaHCO.sub.3 (25 mL), and the
organic phase was dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo. The residue was purified by Gilson RPLC, and
the desired fractions were concentrated in vacuo and azeotroped
first with MeOH and then with EtOAc. The residue was crystallized
from EtOAc hexanes to provide
[(2R)-3-(2-{2-chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-flu-
oro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide (0.0469 g, 57%, mixture of diastereomers) as a white solid.
LCMS: (M+H).sup.+: 498.1.
Example 137
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(4-pyridinyl
methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
hydroxyformamide
##STR00159##
[0777] Part A
2,6-Dichloro-5-fluoro-N-methyl-N-(4-pyridinylmethyl)-4-pyrimidinamine
[0778] Commercially available N-methyl-1-(4-pyridinyl)methanamine
(0.305 g, 2.5 mmol) was dissolved in THF (5 mL). To this solution
was added triethylamine (0.38 mL, 2.73 mmol), followed by
2,4,6-trichloro-5-fluoropyrimidine (0.5 g, 2.5 mmol), which was
dissolved in THF (5 mL). The reaction was left to stir for 2.5
hours. The reaction mixture was diluted with water, then extracted
with ether. The organics were dried (MgSO.sub.4) and concentrated.
The resulting material was purified via filtration over silica gel
with a solvent mixture of 5% MeOH in 95% DCM as the mobile phase to
provide
2,6-dichloro-5-fluoro-N-methyl-N-(4-pyridinylmethyl)-4-pyrimidinamine
as a brown oily solid (0.3516 g, 49%). LCMS: (M+H).sup.+=287.0.
Part B
2-Chloro-5-fluoro-6-hydrazino-N-methyl-N-(4-pyridinyl
methyl)-4-pyrimidinamine
[0779]
2,6-Dichloro-5-fluoro-N-methyl-N-(4-pyridinylmethyl)-4-pyrimidinami-
ne (0.3516 g, 1.23 mmol) was dissolved in 5 mL of DMSO and
hydrazine monohydrate (0.36 mL, 7.4229 mmol). The reaction vessel
was pressure sealed and heated to 50.degree. C. for 2.5 hours. The
reaction mixture was then purified by RP-HPLC to provide
2-chloro-5-fluoro-6-hydrazino-N-methyl-N-(4-pyridinylmethyl)-4-pyrimidina-
mine as a wine colored solid (0.0803 g, 23%). LCMS:
(M+H).sup.+=283.0.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(4-pyridinyl
methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
(tetrahydro-2H-pyran-2-yloxy)formamide
[0780]
2-Chloro-5-fluoro-6-hydrazino-N-methyl-N-(4-pyridinylmethyl)-4-pyri-
midinamine (0.0803 g, 0.2847 mmol) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid, diisopropylamine salt form (0.146 g, 0.3406 mmol)
were dissolved in DMF (4 mL). NMM (0.16 mL, 1.4552 mmol) was added,
followed by HOAt (0.046 g, 0.3382 mmol) and EDC (0.065 g, 0.339
mmol). After stirring overnight the reaction mixture was purified
by RP-HPLC to provide [(2R)-3-(2-{2-chloro-5-fluoro-6-[methyl
(4-pyridinylmethyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)--
3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide as a beige solid
(0.0958 g, 60%). LCMS: (M+H).sup.+=564.3.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(4-pyridinylmethyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0781]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(4-pyridinylmethyl)amino]-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-py-
ran-2-yloxy)formamide (0.0958 g, 0.1701 mmol) was dissolved in
acetic acid (8 mL) and water (2 mL). This reaction mixture was left
to stir overnight. The volatiles were evaporated, and the resulting
material was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[methyl(4-pyridinylmethyl)amino]-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
as a beige solid (0.0249 g, 31%). LCMS: (M+H).sup.+=480.1.
Example 138
[(2R)-3-(2-{2-Chloro-6-[(trans)-3-(dimethylamino)-4-methyl-1-pyrrolidinyl]-
-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydro-
xyformamide
##STR00160##
[0783]
[(2R)-3-(2-{2-Chloro-6-[(trans)-3-(dimethylamino)-4-methyl-1-pyrrol-
idinyl]-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropy-
l]hydroxyformamide was prepared according to General Procedure D,
utilizing (trans)-N,N,4-trimethyl-3-pyrrolidinamine (Example 89) in
place of N-methylpiperazine in Part A. LCMS: (M+H).sup.+:
486.6.
Example 139
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S,3R)-3-hydroxy-2-methyl-1-
-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformam-
ide
##STR00161##
[0785]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S,3R)-3-hydroxy-2-m-
ethyl-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure A, utilizing
(2S,3R)-2-methyl-3-pyrrolidinol (Tetrahedron, 1998, 54,
12547-12560) in place of pyrrolidine in Part A. LCMS: (M+H).sup.+:
439.2.
Example 140
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3-hydroxy-3-methyl-1-pyrrolidinyl)-4-pyri-
midinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
(Mixture of Diastereomers)
##STR00162##
[0786] Part A
3-Methyl-1-(phenyl methyl)-3-pyrrolidinol
[0787] To a solution of commercially available
1-(phenylmethyl)-3-pyrrolidinone (1.0 g, 5.71 mmol) in THF (30 mL)
and ether (30 mL) at 0.degree. C. was added MeMgBr (1.4 M solution
in toluene:THF (3:1)) (6.1 mL, 8.65 mmol). The reaction was stirred
at 0.degree. C. for 1.5 hours, then quenched with water and
extracted. Removed organic solvent in vacuo and extracted again
with ether, dried organics (Na.sub.2SO.sub.4) and removed solvent
in vacuo. Purified by RP-HPLC to provide racemic
3-methyl-1-(phenylmethyl)-3-pyrrolidinol as a yellow oil (0.501 g,
46%). LCMS: (M+H).sup.+=192.3.
Part B
3-Methyl-3-pyrrolidinol
[0788] A solution of 3-methyl-1-(phenylmethyl)-3-pyrrolidinol
(0.501 g, 2.62 mmol) and Pd(C) in MeOH (30 mL) was treated under
standard hydrogenation conditions as in General Procedure A, Part
C, for 3 days to provide 3-methyl-3-pyrrolidinol as an orange oil
(0.239 g, 90%). LCMS: (M+H).sup.+=102.1.
Part C
1-(2,6-Dichloro-5-fluoro-4-pyrimidinyl)-3-methyl-3-pyrrolidinol
[0789] To a solution of 2,4,6-trichloro-5-fluoropyrimidine (0.476
g, 2.36 mmol) and triethylamine (0.36 mL, 2.60 mmol) in THF was
added 3-methyl-3-pyrrolidinol (0.239 g, 2.36 mmol) in THF and MeOH
(2 mL). The reaction was stirred at room temperature for 2.5 hours,
and then the solvent was removed in vacuo. Water was added to the
residue, and the mixture was extracted with ethyl acetate. The
organics were dried (Na.sub.2SO.sub.4) and evaporated to provide
1-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-3-methyl-3-pyrrolidinol as
an orange solid (0.486 g, 77%). LCMS: (M+H).sup.+=266.1.
Part D
1-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-3-methyl-3-pyrrolidinol
[0790]
1-(2,6-Dichloro-5-fluoro-4-pyrimidinyl)-3-methyl-3-pyrrolidinol
(0.486 g, 1.83 mmol) and hydrazine monohydrate (0.53 mL, 10.96
mmol) in DMSO (5 mL) were heated at 50.degree. C. until the
reaction was deemed complete. Purification by RP-HPLC provided
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-3-methyl-3-pyrrolidinol
as a brown solid (0.104 g, 21%). LCMS: (M+H).sup.+=262.1.
Part E
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3-hydroxy-3-methyl-1-pyrrolidinyl)-4-pyri-
midinyl]hydrazino}-2-(cyclopentyl methyl)-3-oxopropyl][(phenyl
methyl)oxy]formamide
[0791]
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.122 g, 0.4 mmol), racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-3-methyl-3-pyrrolidinol
(0.104 g, 0.4 mmol), NMM (0.13 mL, 1.2 mmol), HOAt (0.054 g, 0.4
mmol), EDC (0.077 g, 0.4 mmol) and DMF (2 mL) were combined. When
the reaction was complete, the mixture was purified by RP-HPLC to
provide
[(2R)-3-{2-[2-chloro-5-fluoro-6-(3-hydroxy-3-methyl-1-pyrrolidinyl)-4-pyr-
imidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]f-
ormamide as a mixture of diastereomers (0.035 g, 16%). LCMS:
(M+H).sup.+=549.5.
Part F
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3-hydroxy-3-methyl-1-pyrrolidinyl)-4-pyri-
midinyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[0792] A solution of
[(2R)-3-{2-[2-chloro-5-fluoro-6-(3-hydroxy-3-methyl-1-pyrrolidinyl)-4-pyr-
imidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]f-
ormamide (0.035 g, 0.064 mmol), and Pd(C) (0.005 g) in MeOH (10 mL)
was treated under standard hydrogenation conditions as in General
Procedure A, Part C. Purification by RP-HPLC provided
[(2R)-3-{2-[2-chloro-5-fluoro-6-(3-hydroxy-3-methyl-1-pyrrolidinyl)-4-pyr-
imidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
as a white solid (mixture of diastereomers) (0.010 g, 34%). LCMS:
(M+H).sup.+=459.4.
Example 141
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3S)-3-(hydroxymethyl)-4-mor-
pholinyl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyforma-
mide
##STR00163##
[0794]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(3S)-3-(hydroxymethyl-
)-4-morpholinyl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydro-
xyformamide was prepared according to General Procedure C,
utilizing commerically-available (3S)-3-morpholinylmethanol in
place of azetidine hydrochloride in Part A. LCMS:
(M+H).sup.+487.5.
Example 142
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydropyrazino[1,2-a]azepin-2(1H)-yl-
)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyfor-
mamide
##STR00164##
[0796]
N-[(2R)-3-{2-[2-Chloro-5-fluoro-6-(octahydropyrazino[1,2-a]azepin-2-
(1H)-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]-N-hyd-
roxyformamide was prepared according to General Procedure G,
utilizing commercially-available decahydro-pyrazino[1,2-A]azepine
in place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A, and using 1 equivalent of DIPEA. LCMS:
(M+H).sup.+: 602.4.
Example 143
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(4-morpholinyl)ethyl]amino}-4-pyrimidi-
nyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00165##
[0798]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(4-morpholinyl)ethyl]amino}-4-p-
yrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
commercially-available 4-(2-aminoethyl)morpholine in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 488.3.
Example 144
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2R)-2-(hydroxymethyl)-4-met-
hyl-1-piperazinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfo-
rmamide
##STR00166##
[0800]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2R)-2-(hydroxymethyl-
)-4-methyl-1-piperazinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure A,
utilizing [(2R)-4-methyl-2-piperazinyl]methanol (Tetrahedron:
Asymmetry, 1993, 4, 2389-2398) in place of pyrrolidine in Part A.
LCMS: (M+H).sup.+: 468.3.
Example 145
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3R,5S)-3,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00167##
[0801] Part A
1,1-Dimethylethyl (3R,5S)-3,5-dimethyl-1-piperazinecarboxylate
[0802] To a solution of cis-2,6-dimethylpiperazine (1.142 g, 10
mmol) in dichloromethane (25 mL) at 0.degree. C. was added dropwise
bis(1,1-dimethylethyl)dicarbonate (2.161 g, 9.9 mmol) in
dichloromethane (6 mL). The reaction mixture was allowed to warm to
room temperature and stirred overnight before being diluted with
dichloromethane and washed with saturated aqueous Na.sub.2CO.sub.3
solution. The aqueous layer was back extracted with dichloromethane
once. The combined organic layers were washed with brine, dried
(MgSO.sub.4) and evaporated to yield 1,1-dimethylethyl
(3R,5S)-3,5-dimethyl-1-piperazinecarboxylate (2.04 g, 95%). LCMS:
(M+H).sup.+: 215.1.
Part B
1,1-Dimethylethyl
(3R,5S)-3,4,5-trimethyl-1-piperazinecarboxylate
[0803] To a solution of 1,1-dimethylethyl
(3R,5S)-3,5-dimethyl-1-piperazinecarboxylate (2.04 g, 9.5 mmol) in
dichloromethane (25 mL) at 0.degree. C. was added formaldehyde
(1.075 mL, 37% water solution, 14.3 mmol) followed by sodium
triacetoxyborohydride (2.628 g, 12.4 mmol). The reaction mixture
was allowed to warm to room temperature and stirred for 2 h before
being diluted with dichloromethane and washed with 1N NaOH
solution. The organics were then washed with brine, dried
(MgSO.sub.4) and evaporated to yield 1,1-dimethylethyl
(3R,5S)-3,4,5-trimethyl-1-piperazinecarboxylate (2.06 g, 95%).
LCMS: (M+H).sup.+: 229.2.
Part C
(2R,6S)-1,2,6-Trimethylpiperazine, TFA salt
[0804] 1,1-Dimethylethyl
(3R,5S)-3,4,5-trimethyl-1-piperazinecarboxylate (253 mg, 1.1 mmol)
was dissolved and stirred in dichloromethane (3 mL).
Trifluoroacetic acid (1.2 mL) was added dropwise, and the resulting
reaction mixture was stirred at room temperature for 2.5 h. Then
the solvent was evaporated and the crude, TFA salt of
(2R,6S)-1,2,6-trimethylpiperazine was used for the next step. LCMS:
(M+H).sup.+: 129.1.
Part D
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3R,5S)-3,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
[0805]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3R,5S)-3,4,5-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure G,
utilizing (2R,6S)-1,2,6-trimethylpiperazine, TFA salt in place of
(1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide in
Part A. LCMS: (M+H).sup.+: 486.3.
Example 146
[(2R)-2-(Cyclopentyl
methyl)-3-(2-{6-[(2R,3R)-3-(dimethylamino)-2-methyl-1-pyrrolidinyl]-5-flu-
oro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00168##
[0807]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R,3R)-3-(dimethylamino)-2-me-
thyl-1-pyrrolidinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropy-
l]hydroxyformamide was prepared according to General Procedure A,
utilizing (2R,3R)--N,N,2-trimethyl-3-pyrrolidinamine (Tetrahedron,
1998, 54, 12547-12560) in place of pyrrolidine in Part A. LCMS:
(M+H).sup.+: 466.4.
Example 147
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2,2,4-trimethyl-1-piperazinyl)-4-pyrimidi-
nyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00169##
[0809]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2,2,4-trimethyl-1-piperazinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
1,3,3-trimethyl-piperazine (commercially-available) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 486.3.
Example 148
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3,3,4-trimethyl-1-piperazinyl)-4-pyrimidi-
nyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00170##
[0811]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3,3,4-trimethyl-1-piperazinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
1,2,2-trimethyl-piperazine (commercially-available) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+: 486.3.
Example 149
N-[(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-2-methyl-6-[(3R,5S)-3,4,5-trimethyl-1-piperazinyl]-
-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
##STR00171##
[0813]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3R,5S)-3,-
4,5-trimethyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure A,
utilizing (2R,6S)-1,2,6-trimethylpiperazine, TFA salt (Example 145)
in place of pyrrolidine in Part A, and using 3 equivalents of
DIPEA. LCMS: (M+H).sup.+: 466.4.
Example 150
[(2R)-3-(2-{2-Chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide (Single Unknown
Diastereomer)
##STR00172##
[0814] Part A
(7Z)-5-(Phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
7-(O-methyloxime)
[0815] 5-(Phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione (Example
128) (2.8619 g, 13.29 mmol), sodium acetate (2.23 g, 26.59 mmol),
and O-methylhydroxylamine hydrochloride (2.22 g, 26.59) was
dissolved in 65 mL of MeOH. The mixture was stirred at room
temperature overnight and then diluted with 300 mL of DCM. The
mixture was washed with sat. aq. NaHCO.sub.3 (200 mL), and the
organics were dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo to provide
(7Z)-5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
7-(O-methyloxime) (3.0864 g, 95%). LCMS: (M+H).sup.+: 245.1.
Part B
7-Amino-5-(phenylmethyl)-5-azaspiro[2.4]heptan-4-one
[0816] 7-Amino-5-(phenylmethyl)-5-azaspiro[2.4]heptan-4-one was
prepared according to Example 130, Part C, utilizing
(7Z)-5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione
7-(O-methyloxime) in place of
5-(phenylmethyl)-5-azaspiro[2.4]heptane-4,7-dione. LCMS:
(M+H).sup.+: 203.1.
Part C
N,N-Dimethyl-5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine
[0817] 7-Amino-5-(phenylmethyl)-5-azaspiro[2.4]heptan-4-one (2.535
g, 12.28 mmol) was dissolved in a mixture of AcOH (20 mL) and aq.
HCHO (20 mL) the contents were heated to 100.degree. C. for 3 h and
then cooled to 0.degree. C. The solution was adjusted to pH 14 with
6 N aq. NaOH, and then extracted with Et.sub.2O (2.times.200 mL).
The combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, concentrated in vacuo, and purified by
RP-HPLC to provide
N,N-dimethyl-5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine (2.6062
g, 92.5%). The enantiomeric mixture was separated by chiral LC. E1
(1.4 g) LCMS: (M+H).sup.+: 231. E2 (1.5 g) LCMS: (M+H).sup.+:
231.
Part E
N,N-Dimethyl-5-azaspiro[2.4]heptan-7-amine
[0818] N,N-Dimethyl-5-(phenylmethyl)-5-azaspiro[2.4]heptan-7-amine
(E1) (1.4 g, 0.18 mmol) was dissolved in a mixture of 12 mL of 1N
aq HCl in 30 mL of MeOH, degassed and placed under argon. 10% Pd/C
(280 mg) was added, and the contents were thoroughly degassed and
placed under a hydrogen balloon overnight. The contents were then
degassed and filtered through a 0.2 .mu.m filter tip syringe. The
resulting filtrate was concentrated in vacuo and the residue was
adjusted to pH 14 with 1N aq. NaOH. The aqueous phase was extracted
with CH.sub.2Cl.sub.2 (2.times.100 mL), the combined organic phase
was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to provide the pure
N,N-dimethyl-5-azaspiro[2.4]heptan-7-amine (718 mg, 84%). LCMS:
(M+H).sup.+: not detected.
Part F
2-Chloro-5-fluoro-4,6-bis(phenylthio)pyrimidine
[0819] To a solution of 2,4,6-trichloro-5-fluoropyrimidine (10.0635
g, 49.96 mmol) in DCM (250 mL) at -30.degree. C. was added phenyl
hydrosulfide (10.26 mL, 99.93 mmol). To the solution was added DIEA
(21.8 mL, 124.9 mmol) dropwise via an addition funnel, with
vigorous stirring. The reaction mixture was stirred at room
temperature for 1 h, then the volatiles were concentrated in vacuo,
and the residue was dissolved in MeOH (100 mL) and water (200 mL).
The resulting pale yellow solid precipitate was collected by
filtration. The precipitate was washed with water (2.times.100 mL),
the resulting solid was dried in vacuo to provide
2-chloro-5-fluoro-4,6-bis(phenylthio)pyrimidine (17.4080 g, 99%).
LCMS: (M+H).sup.+: 349.0.
Part G
2-Chloro-5-fluoro-4,6-bis(phenylsulfonyl)pyrimidine
[0820] 2-Chloro-5-fluoro-4,6-bis(phenylthio)pyrimidine (3.0185 g,
8.652 mmol) was dissolved in a mixture of ACN (43 mL) and water (86
mL). To this solution was added sodium periodate (11.10 g, 51.916
mmol) followed by ruthenium(III) chloride (36 mg, 0.173 mmol). The
mixture was vigorously stirred for 3.5 h. The reaction mixture was
extracted with CH.sub.2Cl.sub.2 (2.times.100 mL), and the combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo to provide the pure
2-chloro-5-fluoro-4,6-bis(phenylsulfonyl)pyrimidine (2.51 g, 70%).
LCMS: (M+H).sup.+: 413.0.
Part H
5-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2.-
4]heptan-7-amine
[0821] N,N-Dimethyl-5-azaspiro[2.4]heptan-7-amine (464 mg, 3.31
mmol) and DIEA (580 .mu.L, 3.31 mmol) were dissolved in DCM (43 mL)
and cooled to 0.degree. C. A solution of
2-chloro-5-fluoro-4,6-bis(phenylsulfonyl)pyrimidine (1.2427 g, 3.01
mmol) in 30 mL DCM was added dropwise with vigorous stirring. The
mixture was stirred for 30 min and then concentrated in vacuo. The
residue was dissolved in MeOH (30 mL), hydrazine monohydrate was
added (1.4 mL), and the contents were stirred at RT overnight and
then concentrated in vacuo. The crude residue was dissolved in
CH.sub.2Cl.sub.2 (100 mL), and the mixture was washed with
NaHCO.sub.3 (1.times.50 mL). The aqueous phase was extracted with
CH.sub.2Cl.sub.2 (1.times.100 mL), and the combined organic phase
was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo. The resulting crude product was purified by
RP-HPLC to provide
5-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5-azaspiro[2-
.4]heptan-7-amine (465.5 mg, 53%). LCMS: (M+H).sup.+: 301.2.
Part I
[(2R)-3-(2-{5-Chloro-3-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-2-fluo-
rophenyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]f-
ormamide
[0822]
[(2R)-3-(2-{5-Chloro-3-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-
-2-fluorophenyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethy-
l)oxy]formamide was prepared according to General Procedure E, Part
C, utilizing
5-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-5--
azaspiro[2.4]heptan-7-amine in place of
(5-chloro-2-fluoro-3-hydrazinophenyl)(1-methylethyl)amine. LCMS:
(M+H).sup.+: 588.3.
Part J
[(2R)-3-(2-{5-Chloro-3-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-2-fluo-
rophenyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0823]
[(2R)-3-(2-{5-Chloro-3-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-
-2-fluorophenyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethy-
l)oxy]formamide (300 mg, 0.51 mmol) was dissolved in 5 mL of MeOH.
5% Rhodium on Alumina (240 mg) was added, and the contents were
stirred under a hydrogen balloon overnight. The contents were then
filtered to remove the catalyst, and the filtrate was concentrated
in vacuo. The resulting crude product was purified via reverse
phase HPLC to provide
[(2R)-3-(2-{5-chloro-3-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-2-flu-
orophenyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
(single unknown diastereomer) (142 mg, 56%). LCMS: (M+H).sup.+:
498.3.
Example 151
[(2R)-3-(2-{2-Chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-5-fluo-
ro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyforma-
mide (Single Unknown Diastereomer)
##STR00173##
[0825]
[(2R)-3-(2-{2-Chloro-6-[7-(dimethylamino)-5-azaspiro[2.4]hept-5-yl]-
-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydro-
xyformamide (single unknown diastereomer) was prepared according to
Example 150, utilizing the E2 enantiomer in place of the E1
enantiomer in Part E. LCMS: (M+H).sup.+: 498.3.
Example 152
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (Mixture of Diastereomers)
##STR00174##
[0826] Part A
Methyl 2-methyl-N-[3-(methyloxy)-3-oxopropyl]alaninate
[0827] A solution of N-(2-cyanoethyl)-2-methylalanine (J. Am. Chem.
Soc. 1950, 72, 2599) (22.58 g) in 1.25 M methanolic HCl (460 mL)
was heated at 75.degree. C. and stirred overnight. The solution was
then concentrated in vacuo and diluted with CHCl.sub.3 (200 mL).
The mixture was filtered, and the solution was washed with sat. aq.
NaHCO.sub.3. The organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to provide
methyl 2-methyl-N-[3-(methyloxy)-3-oxopropyl]alaninate (11.71 g,
40% yield) as a colorless oil. LCMS: (M+H).sup.+: 204.1.
Part B
Methyl
2-methyl-N-[3-(methyloxy)-3-oxopropyl]-N-(phenylcarbonyl)alaninate
[0828] To a mixture of methyl
2-methyl-N-[3-(methyloxy)-3-oxopropyl]alaninate (11.71 g, 57.62
mmol) in 1:1 DCM water (300 mL) was added NaHCO.sub.3 (9.68 g,
115.2 mmol) followed by benzoyl chloride (7.02 mL, 60.48 mmol). The
mixture was vigorously stirred overnight, and the phases were then
separated. The organic phase was dried over anhydrous MgSO.sub.4,
filtered, and concentrated in vacuo. The residue was purified by
silica gel chromatography (35% EtOAc in hexanes) to give methyl
2-methyl-N-[3-(methyloxy)-3-oxopropyl]-N-(phenylcarbonyl)alaninate
(3.6787 g, 21% yield) as a colorless oil. LCMS: (M+H).sup.+:
308.1.
Part C
Methyl
5,5-dimethyl-4-oxo-1-(phenylcarbonyl)-3-pyrrolidinecarboxylate
[0829] To a solution of methyl
2-methyl-N-[3-(methyloxy)-3-oxopropyl]-N-(phenylcarbonyl)alaninate
(3.5589 g, 11.58 mmol) in toluene (115 mL) was added MeOH (0.94 mL,
23.21 mmol), and NaOMe (1.25 g, 23.14 mmol). The mixture was heated
at 60.degree. C. and stirred for 2 h. An additional portion of MeOH
(10 mL) was added, and the mixture was stirred for an additional 2
h at 60.degree. C. The mixture was then concentrated in vacuo, and
the residue was partitioned between DCM (200 mL) and 1 N aq. HCl
(100 mL). The organic phase was dried over anhydrous MgSO.sub.4,
filtered, and concentrated in vacuo to provide crude methyl
5,5-dimethyl-4-oxo-1-(phenylcarbonyl)-3-pyrrolidinecarboxylate
(2.746 g, 86% yield) as a colorless oil. LCMS: (M+H).sup.+:
276.1.
Part D
2,2-Dimethyl-1-(phenylcarbonyl)-3-pyrrolidinone
[0830] A solution of methyl
5,5-dimethyl-4-oxo-1-(phenylcarbonyl)-3-pyrrolidinecarboxylate
(2.5781 g, 9.364 mmol) in 10:1 HOAc water (50 mL) was heated at
100.degree. C. and stirred for 42 h. The solution was cooled to
room temperature and concentrated in vacuo. The residue was
dissolved in DCM (200 mL) and washed with sat. aq. NaHCO.sub.3. The
organic phase was dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo to afford crude
2,2-dimethyl-1-(phenylcarbonyl)-3-pyrrolidinone as a light yellow
oil. LCMS: (M+H).sup.+: 218.1.
Part E
(3E)-2,2-Dimethyl-1-(phenylcarbonyl)-3-pyrrolidinone
O-methyloxime
[0831] To a solution of
2,2-dimethyl-1-(phenylcarbonyl)-3-pyrrolidinone (2.0602 g, 9.482
mmol) in MeOH (50 mL) was added sodium acetate (0.956 g, 11.38
mmol) and methoxyamine hydrochloride (0.950 g, 11.37 mmol). The
mixture was stirred overnight and then concentrated in vacuo. The
residue was dissolved in DCM (200 mL) and washed with sat. aq.
NaHCO.sub.3 (50 mL), water (50 mL), and brine (50 mL). The organic
phase was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to afford
(3E)-2,2-dimethyl-1-(phenylcarbonyl)-3-pyrrolidinone O-methyloxime
(1.9567 g, 84% yield) as a light yellow oil that solidified under
high vacuum. LCMS: (M+H).sup.+: 247.2.
Part F
2,2-Dimethyl-1-(phenyl methyl)-3-pyrrolidinamine
[0832] To a solution of
(3E)-2,2-dimethyl-1-(phenylcarbonyl)-3-pyrrolidinone O-methyloxime
(1.9492 g, 7.914 mmol) in THF (80 mL) was added lithium aluminum
hydride (0.900 g, 23.72 mmol), and the mixture was heated at
65.degree. C. and stirred for 5 h. The mixture was cooled to
0.degree. C., and Na.sub.2SO.sub.4.10H.sub.2O (2 g) was added. The
mixture was stirred for 30 min, and 1 N aq. NaOH (100 mL) was then
added. The mixture was extracted with Et.sub.2O (3.times.150 mL),
and the combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to give crude
racemic 2,2-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine (1.8247 g,
>100% crude yield) as a light yellow oil. LCMS: (M+H).sup.+:
205.2.
Part G
N,N,2,2-Tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine
[0833] A solution of racemic
2,2-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine (assumed 1.6169 g,
7.914 mmol) in formic acid (15 mL) and formalin (15 mL) was heated
at 100.degree. C. and stirred for 3 h. The solution was then cooled
to 0.degree. C. and adjusted to pH 14 with 6 N aq. NaOH. The
mixture was extracted with Et.sub.2O (3.times.100 mL), and the
combined organic phase was dried over anhydrous Na.sub.2SO.sub.4,
filtered, and concentrated in vacuo. The residue was purified by
Gilson RPLC to give racemic
N,N,2,2-tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine (0.5637 g,
31% yield for 2 steps) as an orange oil. LCMS: (M+H).sup.+:
233.3.
Part H
N,N,2,2-Tetramethyl-3-pyrrolidinamine
[0834] To a solution of racemic
N,N,2,2-tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine (0.5637 g,
2.426 mmol) in MeOH (24 mL) was added 1 N aq. HCl (4.9 ml) and 10%
Pd/C (50% water, 113 mg). The mixture was hydrogenated overnight,
and then filtered through a 0.2 .mu.M membrane. The resulting
solution was concentrated in vacuo. The residue was diluted with 1
N aq. NaOH (20 mL) and extracted with DCM (2.times.100 mL). The
combined organic phase was dried over anhydrous Na.sub.2SO.sub.4,
filtered, and concentrated in vacuo to afford crude, racemic
N,N,2,2-tetramethyl-3-pyrrolidinamine (0.2930 g, 85% yield) as a
pale yellow oil. LCMS: (M+H).sup.+: 143.1.
Part I
Tris(1,1-dimethylethyl)
2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[0835] To a solution of racemic
N,N,2,2-tetramethyl-3-pyrrolidinamine (0.1466 g, 1.031 mmol) in DMF
(6 mL) was added N,N-diisopropylethylamine (0.220 mL, 1.263 mmol)
and tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.513 g, 1.031 mmol), and the solution was stirred overnight. The
solution was partitioned between Et.sub.2O (100 mL) and water (20
mL), and the organic phase was washed with a fresh portion of water
(20 mL). The combined aqueous phase was extracted with a fresh
portion of Et.sub.2O (50 mL), and the combined organic phase was
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo. The residue was purified by gradient silica gel
chromatography (0% to 100% EtOAc in hexanes) to give racemic
tris(1,1-dimethylethyl)
2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate (0.4647 g, 75% yield) as
a white foam. LCMS: (M+H).sup.+: 603.3.
Part J
1-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,2,2-tetramethyl-3-pyrr-
olidinamine pentahydrochloride
[0836] To a solution of racemic tris(1,1-dimethylethyl)
2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate (0.4618 g, 0.766 mmol)
in MeOH (5 mL) was added 4 N HCl in dioxane (5 mL). The solution
was stirred for 3 days, and then concentrated in vacuo to afford
racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,2,2-tetramethyl-3-pyr-
rolidinamine pentahydrochloride (0.3673 g, 99% yield) as an orange
oil that crystallized under vacuum. LCMS: (M+H).sup.+: 303.1.
Part K
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylm-
ethyl)oxy]formamide
[0837] To a solution of racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,2,2-tetramethyl-3-pyr-
rolidinamine pentahydrochloride (0.3649 g, 0.752 mmol) in DMF (5
mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.2140 g, 0.701 mmol), N-methylmorpholine (0.770 mL, 7.00
mmol), 1-hydroxy-7-azabenzotriazole (114 mg, 0.838 mmol), and EDC
(161 mg, 0.840 mmol). The solution was stirred overnight and
purified directly by Gilson RPLC to provide
[(2R)-3-(2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (0.1755 g, 42% yield, mixture of
diastereomers) as a brown oil. LCMS: (M+H).sup.+: 590.4.
Part L
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
[0838] To a solution of
[(2R)-3-(2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (0.1737 g, 0.294 mmol) in MeOH (10 mL) was
added 5% Rh/C (175 mg). The mixture was hydrogenated at 50 psi
overnight, and was then filtered through a 0.2 .mu.M membrane and
concentrated in vacuo. To a solution of the residue in MeOH (4 mL)
was added 20% Pd(OH).sub.2/C (50% water, 5 mg). The mixture was
hydrogenated under balloon pressure for 50 min. The mixture was
then filtered though a 0.2 .mu.M membrane, and the solution was
concentrated in vacuo. The residue was purified by Gilson RPLC to
give
[(2R)-3-(2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide (0.0670 g, 46% yield, mixture
of diastereomers) as a while solid following crystallization from
EtOAc hexanes. LCMS: (M+H).sup.+: 500.3.
Example 153
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(3-pyridinyl)-1-p-
yrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
(Mixture of Diastereomers)
##STR00175##
[0840]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(3-pyridin-
yl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure A, utilizing
commerically-available 3-(3-pyrrolidinyl)pyridine in place of
pyrrolidine in Part A. (Mixture of diastereomers) LCMS:
(M+H).sup.+486.3.
Example 154
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[2-(hydroxymethyl)-4-morpholi-
nyl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00176##
[0842]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[2-(hydroxymethyl)-4-m-
orpholinyl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide was prepared according to General Procedure C, utilizing
commerically-available 2-morpholinylmethanol in place of azetidine
hydrochloride in Part A. (Mixture of diastereomers) LCMS:
(M+H).sup.+487.5.
Example 155
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-(trans-2,4,5-trimethyl-1-piperazinyl)-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformami-
de (D1, Single Unknown Diastereomer)
##STR00177##
[0843] Part A
Phenylmethyl(trans)-2,5-dimethyl-1-piperazinecarboxylate
(Enantiomeric Mixture)
[0844] To a solution of (2R,5S)-2,5-dimethylpiperazine
(commerically available) (3.495 g, 30 mmol) in dichloromethane (25
mL) at 0.degree. C. was added triethylamine (3.76 mL, 27 mmol)
followed by dropwise benzyl chloroformate (4.0 mL, 27 mmol). The
reaction mixture was allowed to warm to room temperature and
stirred overnight. The solvent was then evaporated to dryness. The
residue was taken up in aqueous 1N HCl solution and washed with
EtOAc. The organic layer was extracted with 1N HCl solution twice
and the combined aqueous layers were basicified with 6N NaOH to
.about.pH 11. The resulting basic aqueous solution was extracted
with EtOAc three times. The combined organic layers were washed
with brine, dried (MgSO.sub.4) and evaporated to yield phenylmethyl
trans-2,5-dimethyl-1-piperazinecarboxylate (enantiomeric mixture)
(1.35 g, 18%). LCMS: (M+H).sup.+: 249.1.
Part B
Phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate
(Enantiomer 1)
[0845] To a solution of phenylmethyl
trans-2,5-dimethyl-1-piperazinecarboxylate (enantiomeric mixture)
(1.35 g, 5.43 mmol) in dichloromethane (40 mL) at 0.degree. C. was
added formaldehyde (0.817 mL, 37% water solution, 10.87 mmol)
followed by sodium triacetoxyborohydride (1.726 g, 8.14 mmol). The
reaction mixture was allowed to warm to room temperature and
stirred for 2 h before being diluted with dichloromethane and
washed with 1N NaOH solution. The organics were washed with brine,
dried (MgSO.sub.4) and evaporated to yield phenylmethyl
trans-2,4,5-trimethyl-1-piperazinecarboxylate (enantiomeric
mixture) (1.42 g, 100%). Phenylmethyl
trans-2,4,5-trimethyl-1-piperazinecarboxylate (enantiomer 1) (480
mg) and phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate
(enantiomer 2) (400 mg) were separated by chiral chromatography.
LCMS: (M+H).sup.+: 263.3.
Part C
trans-1,2,5-Trimethylpiperazine, hydrochloride salt (Enantiomer
1)
[0846] Phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate
(enantiomer 1) (480 mg, 1.83 mmol) was dissolved in 30 mL of MeOH,
degassed and placed under argon. 10% Pd/C (96 mg) was added, and
the contents were thoroughly degassed and placed under a hydrogen
balloon for approximately 3 hrs. The contents were then degassed
and filtered through Celite, and the Celite pad was washed with DCM
and MeOH. 1N HCl (3.8 mL) was added to the resulting filtrate,
which was concentrated in vacuo to provide the
trans-1,2,5-trimethylpiperazine, hydrochloride salt (enantiomer 1)
(370 mg, 100%). LCMS: (M+H).sup.+: 129.1.
Part D
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-(trans-2,4,5-trimethyl-1-piperazinyl)-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformami-
de (D1, Single Unknown Diastereomer)
[0847]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-(trans-2,4,5-trimethyl-1-piperazi-
nyl)-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxy-
formamide was prepared according to General Procedure G, utilizing
trans-1,2,5-trimethylpiperazine, hydrochloride salt (enantiomer 1)
in place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 156
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(3R)-3-[(dimethylamino)methyl]-4-morp-
holinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfor-
mamide
##STR00178##
[0848] Part A
(3S)--N,N-Dimethyl-5-oxo-4-(phenyl
methyl)-3-morpholinecarboxamide
[0849] To a solution of
(3S)-5-oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid (1.5 g, 6.4
mmol) (J. Chem. Soc., Perkin Trans. 1, 1985, 25772580) in THF (50
mL) was added dimethylamine (3.8 mL, 7.6 mmol, 2M in THF), EDC
(1.46 g, 7.7 mmol), HOAt (1.06 g, 7.7 mmol) and NMM (3.5 mL, 30
mmol). The reaction mixture was stirred overnight and the THF was
evaporated, replacing it with EtOAc. 1 M HCl was added and the
phases were separated. The aqueous layer was extracted twice with
EtOAc and the combined organics were dried over sodium sulfate.
Concentration in vacuo yielded
(3S)--N,N-dimethyl-5-oxo-4-(phenylmethyl)-3 morpholinecarboxamide,
which was purified by RP-HPLC. LCMS: (M+H).sup.+: 263.1.
Part B
Dimethyl{[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}amine
[0850] (3S)--N,N-Dimethyl-5-oxo-4-(phenylmethyl)-3
morpholinecarboxamide (390 mg, 1.5 mmol) was dissolved in THF (20
mL) and the solution was cooled to 0.degree. C. LiAlH.sub.4 (225
mg, 5.9 mmol) was added and the resulting mixture was refluxed
overnight. Upon cooling to 0.degree. C., water (1.4 mL) was added
followed by 15% (w/w) NaOH (aq) (1.4 mL) and finally another
portion of water (4.2 mL). Stirring for 30 min followed by
filtration and concentration in vacuo yielded a crude mixture which
was purified by RP-HPLC to provide
dimethyl{[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}amine (510 mg,
41%). LCMS: (M+H).sup.+: 235.2.
Part C
Dimethyl[(3R)-3-morpholinylmethyl]amine.HCl
[0851] To a solution of
dimethyl{[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}amine (510 mg)
in degassed MeOH and 4 drops of concentrated HCl was added 10%
(Pd/C) (100 mg). The resulting mixture was hydrogenated at 50 psi
on a Parr shaker for 3 hours before being filtered and concentrated
in vacuo. This yielded dimethyl[(3R)-3-morpholinylmethyl]amine as
the hydrochloride salt. LCMS: (M+H).sup.+: 145.2.
Part D
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(3R)-3-[(dimethylamino)methyl]-4-morp-
holinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfor-
mamide
[0852]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(3R)-3-[(dimethylamino)methyl]-
-4-morpholinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hyd-
roxyformamide was prepared according to General Procedure E,
utilizing dimethyl[(3R)-3-morpholinylmethyl]amine hydrochloride in
place of isopropyl amine in Part A. LCMS: (M+H).sup.+: 502.2.
Example 157
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}--
4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e
##STR00179##
[0853] Part A
Tris(1,1-dimethylethyl)
2-(2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-4-pyrimi-
dinyl)-1,1,2-hydrazinetricarboxylate
[0854] To a stirred solution of commercially-available
[2-methyl-2-(4-morpholinyl)propyl]amine (0.158 g, 1.00 mmol) in DMF
(10 mL) under a nitrogen atmosphere at 0.degree. C., was added
diisopropylethylamine (0.19 mL, 1.1 mmol) followed immediately by
tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.497 g, 1.00 mmol). The reaction was allowed to reach room
temperature and was stirred overnight. Then ether was added, and
the mixture was washed with water. The aqueous layer was back
extracted with ether, and the combined organics were dried
(Na.sub.2SO.sub.4) and concentrated in vacuo. The resulting residue
was purified by silica gel chromatography (5-60% ethyl acetate in
hexanes, 1% triethylamine) to provide tris(1,1-dimethylethyl)
2-(2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-4-pyrimi-
dinyl)-1,1,2-hydrazinetricarboxylate as a clear oil (0.578 g, 94%).
LCMS: (M+H).sup.+=619.4.
Part B
2-Chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-4(1H)-pyrimi-
dinone hydrazone
[0855] To a suspension of tris(1,1-dimethylethyl)
2-(2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-4-pyrimi-
dinyl)-1,1,2-hydrazinetricarboxylate (0.578 g, 0.94 mmol) in MeOH
(8 mL) was added 4M HCl in 1,4-dioxane (8 mL), and the resulting
mixture was stirred at room temperature overnight. The solvent was
removed in vacuo, and the crude residue was treated with an aqueous
K.sub.2CO.sub.3 extractive workup to provide
2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-4(1H)-pyrim-
idinone hydrazone as a brown oil (0.249 g). LCMS:
(M+H).sup.+=319.2.
Part C
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}--
4-pyrimidinyl)hydrazino]-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0856]
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.238 g, 0.78 mmol),
2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-4(1H)-pyrim-
idinone hydrazone (0.249 g), NMM (0.26 mL, 2.35 mmol), HOAt (0.106
g, 0.78 mmol), EDC (0.150 g, 0.78 mmol) and DMF (4 mL) were
combined, and the solution was stirred overnight. Purification by
RP-HPLC provided
[(2R)-3-[2-(2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-
-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl-
)oxy]formamide as a brown oil (0.169 g). LCMS:
(M+H).sup.+=606.3.
Part D
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}--
4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e
[0857]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]-
amino}-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (0.169 g, 0.28 mmol) and Pd(OH).sub.2 (0.017
g) were treated as described in General Procedure E, Part D, to
provide
[(2R)-3-[2-(2-chloro-5-fluoro-6-{[2-methyl-2-(4-morpholinyl)propyl]amino}-
-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformami-
de as a white solid (0.070 g, 49%). LCMS: (M+H).sup.+=516.3.
Example 158
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-(trans-2,4,5-trimethyl-1-piperazinyl)-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformami-
de (D2, Single Unknown Diastereomer)
##STR00180##
[0858] Part A
trans-1,2,5-Trimethylpiperazine, hydrochloride salt (Enantiomer
2)
[0859] Phenylmethyl trans-2,4,5-trimethyl-1-piperazinecarboxylate
(enantiomer 2) (Example 155, Part B) (400 mg, 1.52 mmol) was
dissolved in 30 mL of MeOH, degassed and placed under argon. 10%
Pd/C (80 mg) was added, and the contents were thoroughly degassed
and placed under a hydrogen balloon for approximately 3 hrs. The
contents were then degassed and filtered through Celite, and the
Celite pad was washed with DCM and MeOH. 1N HCl (3.2 mL) was added
to the resulting filtrate, which was concentrated in vacuo to
provide the trans-1,2,5-trimethylpiperazine, hydrochloride salt
(enantiomer 2) (370 mg, 100%). LCMS: (M+H).sup.+: 129.1.
Part B
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-(trans-2,4,5-trimethyl-1-piperazinyl)-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyformami-
de (D2, Single Unknown Diastereomer)
[0860]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-(trans-2,4,5-trimethyl-1-piperazi-
nyl)-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxy-
formamide was prepared according to General Procedure G, utilizing
trans-1,2,5-trimethylpiperazine, hydrochloride salt (enantiomer 2)
in place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 159
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (D1, Single Unknown Diastereomer)
##STR00181##
[0861] Part A
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenyl methyl)oxy]formamide
[0862] To a solution of racemic
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,4,4-tetramethyl-3-pyr-
rolidinamine (7.37 g, 24.34 mmol, prepared according to the
procedures of Example 133) in DMF (77 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (7.08 g, 23.18 mmol), N-methylmorpholine (12.75 mL, 116.0
mmol), 1-hydroxy-7-azabenzotriazole (3.79 g, 27.85 mmol), and EDC
(5.33 g, 27.80 mmol). The solution was stirred overnight and was
then diluted with Et.sub.2O (100 mL) and washed with water
(3.times.100 mL). The combined aqueous phase was extracted with a
fresh portion of Et.sub.2O (100 mL), and this organic phase was
washed with a fresh portion of water (50 mL). The combined organic
phase was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo. The residue was diluted with EtOAc (200 mL),
and the resulting solution was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to afford
crude
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (12.52 g, 92% yield, mixture of
diastereomers). LCMS: (M+H).sup.+: 590.2.
[0863] The diastereomeric mixture was purified and separated by
chiral preparative supercritical fluid chromatography (Chiralcel
OJ-H 21.2.times.250 mm, 15% MeOH (0.5% isopropylamine) 85%
CO.sub.2, 70 mL/min, 35.degree. C., 280 nM detection, 16 mg
injection per cycle) to give both enantiomers in pure form.
Part B
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (D1, Single
Unknown Diastereomer)
[0864] To a solution of the first eluting enantiomer of
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (3.90 g, 6.61
mmol) in MeOH (66 mL) was added 20% Pd(OH).sub.2/C (50% water, 390
mg). The mixture was hydrogenated for 30 min under balloon
pressure, and was then filtered through a 0.2 .mu.M membrane. The
solution was concentrated in vacuo and the residue was purified by
Gilson RPLC. The desired fractions were combined, concentrated in
vacuo, and azeotroped with MeOH. The residue was crystallized from
EtOAc hexanes to give
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (1.6820 g, 51% yield, single enantiomer,
unknown relative configuration) as a light pink solid. LCMS:
(M+H).sup.+: 500.3.
Example 160
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (D2, Single Unknown Diastereomer)
##STR00182##
[0866] To a solution of the second eluting enantiomer of
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (3.1 g, 5.25 mmol, as per Example 159) in MeOH
(50 mL) was added 20% Pd(OH).sub.2/C (50% water, 310 mg). The
mixture was hydrogenated for 30 min under balloon pressure, and was
then filtered. The solution was concentrated in vacuo and the
residue was purified by Gilson RPLC. The desired fractions were
combined, concentrated in vacuo, and azeotroped with MeOH followed
by EtOAc. The residue was crystallized from EtOAc hexanes to give
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-3,3-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (1.0294 g, 39%
yield, single enantiomer, unknown relative configuration) as a
light pink solid. LCMS: (M+H).sup.+: 500.3.
Example 161
[(2R)-3-(2-{2-Chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (Mixture of Diastereomers)
##STR00183##
[0867] Part A
N,N-Dimethyl-3-(phenylmethyl)-3-azabicyclo[3.1.0]hexan-1-amine
[0868] A solution of racemic
3-(phenylmethyl)-3-azabicyclo[3.1.0]hexan-1-amine (Tetrahedron
Lett. 2003, 44, 2485) (0.5930 g, 3.150 mmol) in formic acid (6 mL)
and formalin (6 mL) was heated at 100.degree. C. and stirred for 2
h. The solution was then cooled to room temperature and adjusted to
pH 14 with 6 N aq. NaOH. The mixture was extracted with Et.sub.2O
(2.times.100 mL), and the combined organic phase was dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo.
The residue was purified by silica gel chromatography (4% MeOH in
DCM, 1% Et.sub.3N) to afford racemic
N,N-dimethyl-3-(phenylmethyl)-3-azabicyclo[3.1.0]hexan-1-amine
(0.5806 g, 85%) as a yellow oil. LCMS: (M+H).sup.+: 217.2.
Part B
N,N-Dimethyl-3-azabicyclo[3.1.0]hexan-1-amine dihydrochloride
[0869] To a solution of racemic
N,N-dimethyl-3-(phenylmethyl)-3-azabicyclo[3.1.0]hexan-1-amine
(0.5800 g, 2.681 mmol) in MeOH (13 mL) was added 1 N aq. HCl (5.4
mL, 5.4 mmol) and 10% Pd/C (50% water, 120 mg). The mixture was
hydrogenated under balloon pressure overnight, and then filtered.
The solution was concentrated in vacuo and azeotroped with MeOH
(4.times.50 mL) to give crude, racemic
N,N-dimethyl-3-azabicyclo[3.1.0]hexan-1-amine dihydrochloride
(0.5453 g, >100% crude yield) as a light yellow foam. LCMS:
(M+H).sup.+: 127.2.
Part C
Tris(1,1-dimethylethyl)
2-{2-chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[0870] To a solution of racemic
N,N-dimethyl-3-azabicyclo[3.1.0]hexan-1-amine dihydrochloride
(assumed 0.5339 g, 2.681 mmol) in DMF (13 mL) was added
tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(1.33 g, 2.674 mmol) and N,N-diisopropylethylamine (1.87 mL, 10.74
mmol). The solution was stirred overnight and then diluted with
Et.sub.2O (100 mL). The mixture was washed with water (2.times.50
mL), and the combined aqueous phase was extracted with a fresh
portion of Et.sub.2O (50 mL). The combined organic phase was dried
over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in
vacuo. The residue was purified by gradient silica gel
chromatography (0% to 100% EtOAc in hexanes; 1% Et.sub.3N) to
afford racemic tris(1,1-dimethylethyl)
2-{2-chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate (1.3261 g, 84%) as a
white foam. LCMS: (M+H).sup.+: 587.3.
Part D
3-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-3-azabicyclo[-
3.1.0]hexan-1-amine
[0871] To a solution of racemic tris(1,1-dimethylethyl)
2-{2-chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate (1.3231 g, 2.254 mmol)
in MeOH (13 mL) was added 4 N HCl in dioxane (13 mL). The solution
was stirred for 3 days, and was then concentrated in vacuo. The
residue was partitioned between 10% aq. K.sub.2CO.sub.3 and DCM,
and the aqueous phase was extracted with a fresh portion of DCM.
The combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to give
racemic
3-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-3-azabicyclo-
[3.1.0]hexan-1-amine (0.3415 g, 53%) as a brown solid. LCMS:
(M+H).sup.+: 287.1.
Part E
[(2R)-3-(2-{2-Chloro-6-O-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5-fl-
uoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylme-
thyl)oxy]formamide
[0872] To a solution of racemic
3-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N-dimethyl-3-azabicyclo-
[3.1.0]hexan-1-amine (0.3374 g, 1.177 mmol) in DMF (10 mL) was
added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (0.3257 g, 1.067 mmol), N-methylmorpholine (0.590 mL, 5.366
mmol), 1-hydroxy-7-azabenzotriazole (0.174 g, 1.278 mmol), and EDC
(0.245 g, 1.278 mmol). The mixture was stirred overnight, and then
diluted with Et.sub.2O (100 mL). The mixture was washed with water
(2.times.50 mL), and the combined aqueous phase was extracted with
a fresh portion of Et.sub.2O (50 mL). This organic phase was washed
with a fresh portion of water (50 mL), and the combined organic
phase was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo. The residue was diluted with DCM (200 mL),
and dried over anhydrous Na.sub.2SO.sub.4. The mixture was filtered
and concentrated in vacuo to provide crude
[(2R)-3-(2-{2-chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (0.6428 g, >100% crude yield, mixture of
diastereomers) as an orange oil. LCMS: (M+H).sup.+: 574.2.
Part F
[(2R)-3-(2-{2-Chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
[0873] To a solution of
[(2R)-3-(2-{2-chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (assumed 0.6123 g, 1.067 mmol) in MeOH (10 mL)
was added 20% Pd(OH).sub.2/C (50% water, 61 mg). The mixture was
hydrogenated for 6.5 h and then filtered. The filtrate was
concentrated in vacuo and purified by Gilson RPLC to give
[(2R)-3-(2-{2-chloro-6-[1-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide (0.2537 g, 49% yield for 2 steps, mixture of
diastereomers) as a light pink solid. LCMS: (M+H).sup.+: 484.2.
Example 162
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(trans-2,4,5-trime-
thyl-1-piperazinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxyformami-
de (Single Unknown Diastereomer)
##STR00184##
[0875]
N-[(2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(trans-2,4,-
5-trimethyl-1-piperazinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl]-N-hydroxy-
formamide (single unknown diastereomer) was prepared according to
General Procedure A, utilizing trans-1,2,5-trimethylpiperazine,
hydrochloride salt (enantiomer 2) (Example 158) in place of
pyrrolidine in Part A, and using 3 equivalents of DIPEA. LCMS:
(M+H).sup.+: 466.2.
Example 163
[(2R)-3-{2-[2-Chloro-6-(cyclopentylamino)-5-fluoro-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00185##
[0877]
[(2R)-3-{2-[2-Chloro-6-(cyclopentylamino)-5-fluoro-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide was
prepared according to General Procedure E, utilizing
cyclopentylamine in place of isopropyl amine in Part A. LCMS:
(M+H).sup.+: 443.2/445.4.
Example 164
[0878]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-methyl-3-(4-morpholinyl)-1-azeti-
dinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide.
##STR00186##
Part A
4-[1-(Diphenylmethyl)-3-methyl-3-azetidinyl]morpholine
[0879] 1-(Diphenylmethyl)-3-methyl-3-azetidinyl methanesulfonate
was prepared according to reported procedure (J. Med. Chem., 1993,
36, 801-810). A mixture of this compound (1.50 g, 4.53 mmol) and
morpholine (3.90 g, 45.3 mmol) in isopropanol (20 ml) was heated to
70.degree. C. overnight. After cooling to room temperature, the
mixture was concentrated to dryness in vacuo. Water (100 mL) was
added, and the mixture was extracted with dichloromethane
(2.times.100 mL). The combined organic solution was washed with
brine (60 mL), dried (Na.sub.2SO.sub.4) and concentrated. The
residue was purified via RP-HPLC to provide
4-[1-(diphenylmethyl)-3-methyl-3-azetidinyl]morpholine (1.05 g,
71.9%). LCMS: (M+H).sup.+323.3.
Part B
4-(3-Methyl-3-azetidinyl)morpholine dihydrochloride
[0880] A mixture of
4-[1-(diphenylmethyl)-3-methyl-3-azetidinyl]morpholine (1.05 g,
3.26 mmol), 10% Pd(OH).sub.2 (0.12 g) in ethanol (30 ml) and 1N HCl
(7 ml) was treated with H.sub.2 at 60 psi overnight. The catalyst
was removed by filtration, and the solvent was evaporated under
vacuum. The residue was washed with benzene (3.times.5 ml) and
dried under high vacuum to provide
4-(3-methyl-3-azetidinyl)morpholine dihydrochloride (0.52 g,
74.9%). LCMS: (M+H).sup.+156.9.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-methyl-3-(4-morpholinyl)-1-azetidinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e
[0881]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-methyl-3-(4-morpholinyl)-1-azeti-
dinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide was prepared according to General Procedure D, utilizing
4-(3-methyl-3-azetidinyl)morpholine dihydrochloride in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+514.4.
Example 165
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(4-pyridinyl)-1-p-
yrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00187##
[0883]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-(4-pyridin-
yl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
was prepared in a manner similar to Example 182, utilizing
4-(3-pyrrolidinyl)pyridine in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part A.
LCMS: (M+H).sup.+486.2.
Example 166
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (D1, Single Unknown Diastereomer)
##STR00188##
[0884] Part A
2,2-Dimethyl-1-(phenylmethyl)-3-pyrrolidinamine
[0885] Racemic 2,2-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine was
prepared according the procedures described in Example 152. The
enantiomers were separated by preparative LC (Chiralpak AD 20.mu.
100.times.250 mm column, 75:25:0.1 MeCN-MeOH-iPrNH.sub.2, 400
mL/min, 254 nm detection) to provide the (+)- and (-)-enantiomers
of 2,2-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine.
Part B
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[0886] The (+)-enantiomer of
2,2-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine was employed to
prepare
[(2R)-3-(2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide according to the procedures of Example 152 as a single
diastereomer with unknown relative configuration. LCMS:
(M+H).sup.+: 500.3.
Example 167
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (D2, Single Unknown Diastereomer)
##STR00189##
[0888] The (-)-enantiomer of
2,2-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine, prepared according
to the procedures of Example 166, was employed to prepare
[(2R)-3-(2-{2-chloro-6-[3-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide as per Example 152 as a single diastereomer with unknown
relative configuration. LCMS: (M+H).sup.+: 500.3.
Example 168
[(2R)-3-{2-[2-Chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]hydrazino}-
-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00190##
[0889] Part A
Tris(1,1-dimethylethyl)
2-[2-chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]-1,1,2-hydrazinetr-
icarboxylate
[0890] To a solution of tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.497 g, 1.0 mmol) in DMF (5 mL) at room temperature was added
diisopropylethylamine (0.19 mL, 1.10 mmol) followed immediately by
commercially available cyclobutylamine (0.085 mL, 1.0 mmol). The
reaction was stirred for 4 days, then ether was added, and the
mixture was washed with water and the aqueous layer was back
extracted. The combined organics were dried (Na.sub.2SO.sub.4),
concentrated in vacuo, and azeotroped once with MeOH to provide
tris(1,1-dimethylethyl)
2-[2-chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]-1,1,2-hydrazinetr-
icarboxylate as a white solid.
Part B
2-Chloro-6-(cyclobutylamino)-5-fluoro-4(1H)-pyrimidinone
hydrazone
[0891] To a solution of tris(1,1-dimethylethyl)
2-[2-chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]-1,1,2-hydrazinetr-
icarboxylate (0.495 g, 0.96 mmol) in MeOH (10 mL) was added 4M HCl
in 1,4-dioxane (10 mL). The reaction was stirred at room
temperature overnight, then the solvent was evaporated, and the
residue was treated with a standard K.sub.2CO.sub.3 aqueous workup
to provide 2-chloro-6-(cyclobutylamino)-5-fluoro-4(1H)-pyrimidinone
hydrazone as a reddish brown oil (0.225 g). LCMS:
(M+H).sup.+=232.0.
Part C
[(2R)-3-{2-[2-Chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]hydrazino}-
-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
[0892] To a stirred solution of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (0.282 g, 0.92 mmol),
2-chloro-6-(cyclobutylamino)-5-fluoro-4(1H)-pyrimidinone hydrazone
(0.225 g), HOAt (0.132 g, 0.97 mmol) and NMM (0.53 mL, 4.85 mmol)
in DMF (5 mL) was added EDC (0.186 g, 0.97 mmol) and the reaction
was stirred overnight. The mixture was diluted with ether, washed
with water, and the aqueous layer was back extracted with ether.
The organics were dried (Na.sub.2SO.sub.4) and concentrated in
vacuo. The resulting residue was purified by RP-HPLC to provide
[(2R)-3-{2-[2-chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide as
a brown oil (0.055 g). LCMS: (M+H).sup.+=519.2.
Part D
[(2R)-3-{2-[2-Chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]hydrazino}-
-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0893]
[(2R)-3-{2-[2-Chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]hyd-
razino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
(0.055 g, 0.106 mmol) was dissolved in MeOH (5 mL) at room
temperature. Pd(OH).sub.2 (0.006 g) was added and the contents were
stirred under a hydrogen balloon for 4 hours. The contents were
filtered to remove the catalyst, and the filtrate was concentrated
in vacuo. The above procedure was repeated 3 more times. Twice
Pd(OH).sub.2 (0.010 g) was used and the third time Pd(OH).sub.2
(0.015 g) was used and The reaction was stirred for 5.5 hours. The
contents were filtered to remove the catalyst, and the filtrate was
concentrated in vacuo. The resulting crude product was purified by
RP-HPLC to provide
[(2R)-3-{2-[2-chloro-6-(cyclobutylamino)-5-fluoro-4-pyrimidinyl]hydrazino-
}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide as a tan solid
(0.005 g, 11%). LCMS: (M+H).sup.+=428.9.
Example 169
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazin-
-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide
##STR00191##
[0894] Part A
(3S)-5-Oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid
[0895] To a 0.degree. C. solution of N-benzylserine (19.15 g, 105.7
mmol) in 2 N aq. NaOH (100 mL) was added chloroacetyl chloride
(10.2 mL, 126.4 mmol) dropwise, and the solution was stirred for 45
min. To the solution was added 30% aq. NaOH (40 mL) dropwise, and
the reaction was stirred for 1 h, and then stirred and warmed to
room temperature for 72 h. The reaction was adjusted to pH 1 and
extracted with three portions of EtOAc. The combined organic phase
was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo. The residue was washed with EtOAc/hexane to
give (3S)-5-oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid (4.61
g, 19% yield).
Part B
(3S)-5-Oxo-N,4-bis(phenylmethyl)-3-morpholinecarboxamide
[0896] To a solution of
(3S)-5-oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid (4.611 g,
19.60 mmol) in DCM (65 mL) was added benzylamine (2.6 mL, 23.80
mmol), N-methylmorpholine (11 mL, 100.0 mmol),
1-hydroxy-7-azabenzotriazole (3.20 g, 23.51 mmol), and EDC (4.51 g,
23.53 mmol). The solution was stirred overnight and then diluted
with DCM (100 mL). The solution was washed with 6 N aq. HCl
(2.times.100 mL), and the organic phase was dried over anhydrous
MgSO.sub.4, filtered, and concentrated in vacuo to provide crude
(3S)-5-oxo-N,4-bis(phenylmethyl)-3-morpholinecarboxamide (6.454 g,
>100% crude yield) as a pale yellow foam. LCMS: (M+H).sup.+:
325.2.
Part C
1-Phenyl-N-{[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}methanamine
[0897] To a solution of
(3S)-5-oxo-N,4-bis(phenylmethyl)-3-morpholinecarboxamide (6.3109 g,
19.45 mmol) in 1,2-dimethoxyethane (100 mL) was added LiAlH.sub.4
(2.6 g, 68.51 mmol). The mixture was heated at 100.degree. C. and
stirred for 6 h, and then cooled to 60.degree. C. and stirred
overnight. The mixture was cooled to 0.degree. C. and quenched by
slow addition of 1 N aq. NaOH (100 mL). The mixture was extracted
with Et.sub.2O (2.times.150 mL), and the combined organic phase was
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo. The residue was purified by gradient silica gel
chromatography (1% to 5% MeOH in DCM) to give
1-phenyl-N-{[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}methanamine
(3.8342 g, 66%) as a light yellow oil. LCMS: (M+H).sup.+:
297.1.
Part D
Methyl
oxo((phenylmethyl){[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}amin-
o)acetate
[0898] To a solution of
1-phenyl-N-{[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}methanamine
(3.3777 g, 11.40 mmol) in THF (114 mL) was added
N,N-diisopropylethylamine (3 mL, 17.22 mmol). To the solution was
added methyl chloro(oxo)acetate (1.15 mL, 12.50 mmol) dropwise via
syringe, and the mixture was stirred for 3 h. The solvent was
removed in vacuo, and the residue was dissolved in EtOAc (200 mL)
and washed with sat. aq. NaHCO.sub.3 followed by water. The organic
phase was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to afford crude methyl
oxo((phenylmethyl){[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}ami-
no)acetate (4.6881 g, >100% crude yield) as a yellow oil. LCMS:
(M+H).sup.+: 383.1.
Part E
(9aR)-8-(Phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
[0899] To a solution of crude methyl
oxo((phenylmethyl){[(3R)-4-(phenylmethyl)-3-morpholinyl]methyl}amino)acet-
ate (assumed 4.3583 g, 11.40 mmol) in MeOH (114 mL) was added 10%
Pd/C (50% water, 870 mg). The mixture was hydrogenated under
balloon pressure for 16 h, and then filtered through a 0.2 .mu.m
membrane. The solution was concentrated in vacuo, and the residue
was triturated with 20% EtOAc hexanes. The resulting solid was
collected by vacuum filtration and washed with hexanes to provide
(9aR)-8-(phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
(2.5610 g, 86% for 2 steps) as a light yellow solid. LCMS:
(M+H).sup.+: 261.1.
Part F
(9aR)-8-(Phenylmethyl)octahydropyrazino[2,1-c][1,4]oxazine
[0900] To a 0.degree. C. solution of
(9aR)-8-(phenylmethyl)hexahydropyrazino[2,1-c][1,4]oxazine-6,7-dione
(2.5610 g, 9.84 mmol) in THF (100 mL) was added LiAlH.sub.4 (1.12
g, 29.51 mmol) portionwise. The mixture was heated at 70.degree. C.
and stirred for 1 week. The mixture was then cooled to 0.degree. C.
and quenched by addition of Na.sub.2SO.sub.4.10H.sub.2O (2 g)
followed by 1 N aq. NaOH (100 mL). The mixture was extracted with
Et.sub.2O (2.times.150 mL), and the combined organic phase was
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo. The residue was dissolved in DCM (200 mL), dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo.
The residue was purified by gradient silica gel chromatography (0%
to 100% EtOAc in hexanes; 1% Et.sub.3N) to give
(9aR)-8-(phenylmethyl)octahydropyrazino[2,1-c][1,4]oxazine (1.8147
g, 79%) as a colorless oil. LCMS: (M+H).sup.+: 233.1.
Part G
(9aR)-Octahydropyrazino[2,1-c][1,4]oxazine dihydrochloride
[0901] To a solution of
(9aR)-8-(phenylmethyl)octahydropyrazino[2,1-c][1,4]oxazine (1.8055
g, 7.77 mmol) in MeOH (80 mL) was added 1 N aq. HCl (15.5 mL, 15.5
mmol) and 10% Pd/C (50% water, 360 mg). The mixture was
hydrogenated under balloon pressure overnight, and was then
filtered through a 0.2 .mu.m PTFE membrane. The solution was
concentrated in vacuo and the residue was azeotroped with MeOH
(3.times.50 mL) to provide crude
(9aR)-octahydropyrazino[2,1-c][1,4]oxazine dihydrochloride (1.7185
g, >100% crude yield) as an orange solid. LCMS: (M+H).sup.+:
142.9.
Part H
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-y-
l]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[0902] To a solution of crude
(9aR)-octahydropyrazino[2,1-c][1,4]oxazine dihydrochloride (1.7185
g, 7.99 mmol) in DMF (40 mL) was added tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(3.97 g, 7.98 mmol) and N,N-diisopropylethylamine (4.60 mL, 26.41
mmol). The solution was stirred overnight and then diluted with
Et.sub.2O (200 mL). The mixture was washed with water (2.times.100
mL), and the combined aqueous phase was extracted with a fresh
portion of Et.sub.2O (100 mL). The combined organic phase was
washed with a fresh portion of water (50 mL), and then dried over
anhydrous Na.sub.2SO.sub.4. The mixture was filtered, concentrated
in vacuo, and the residue was dissolved in DCM (200 mL) and dried
over anhydrous Na.sub.2SO.sub.4. The mixture was filtered, and the
solution was concentrated in vacuo. The residue was purified by
gradient silica gel chromatography (0% to 100% EtOAc in hexanes; 1%
Et.sub.3N) to afford tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-y-
l]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (4.34 g, 90%) as a
white foam. LCMS: (M+H).sup.+: 603.3.
Part I
(9aR)-8-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)octahydropyrazino[2,1-
-c][1,4]oxazine
[0903] To a solution of tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-y-
l]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (4.34 g, 7.20 mmol)
in MeOH (18 mL) was added 4 N HCl in dioxane (18 mL, 72 mmol). The
solution was stirred for 3 days, and then concentrated in vacuo.
The residue was dissolved in water (50 mL) and the solution was
adjusted to pH 10 with 20% aq. K.sub.2CO.sub.3. The mixture was
extracted with DCM (2.times.100 mL), and the combined organic phase
was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to give
(9aR)-8-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)octahydropyrazino[2,-
1-c][1,4]oxazine (1.41 g, 65%) as an orange solid. LCMS:
(M+H).sup.+: 303.1.
Part J
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazin-
-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(ph-
enylmethyl)oxy]formamide
[0904] To a solution of
(9aR)-8-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)octahydropyrazino[2,-
1-c][1,4]oxazine (1.41 g, 4.66 mmol) in DMF (45 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (1.36 g, 4.45 mmol), N-methylmorpholine (2.45 mL, 22.3 mmol),
1-hydroxy-7-azabenzotriazole (0.730 g, 5.364 mmol), and EDC (1.02
g, 5.32 mmol). The solution was stirred overnight and was then
diluted with Et.sub.2O (200 mL). The mixture was washed with water
(2.times.100 mL), and the combined aqueous phase was extracted with
a fresh portion of Et.sub.2O (100 mL). This Et.sub.2O layer was
washed with a fresh portion of water (50 mL), and the combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo. The residue was dissolved in DCM (200
mL), dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo. The residue was azeotroped with MeOH (50 mL)
to give
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazi-
n-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(p-
henylmethyl)oxy]formamide (2.4027 g, 91% crude yield) as a
red/orange oil. LCMS: (M+H).sup.+: 590.2.
Part K
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazin-
-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide
[0905] To a solution of
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazi-
n-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(p-
henylmethyl)oxy]formamide (2.3947 g, 4.058 mmol) in MeOH (40 mL)
was added 20% Pd(OH).sub.2/C (50% water, 240 mg). The mixture was
hydrogenated under balloon pressure for 2.5 h, and then filtered
through a 0.2 .mu.m membrane. The solution was concentrated in
vacuo, and the residue was purified by Gilson RPLC (10% MeCN in
water to 65% MeCN in water; 8 min gradient). The desired fractions
were combined, and the MeCN was removed in vacuo. The resulting
mixture was extracted with EtOAc (2.times.150 mL), and the combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo. The residue was then crystallized from
EtOAc hexanes to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(9aR)-hexahydropyrazino[2,1-c][1,4]oxazi-
n-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide (1.2759 g, 63%) as a pale pink solid. LCMS:
(M+H).sup.+: 500.1.
Example 170
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S)-4-methyl-3-(1-methylethyl)-1-piperaz-
inyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00192##
[0906] (2S)-1-Methyl-2-(1-methylethyl)piperazine,
dihydrochloride
[0907] a) Commerically-available
(S)--N4-benzyl-2-isopropylpiperazine (2.0 g, 9.2 mmol), sodium
triacetoxyborohydride (2.9 g, 13.8 mmol), and formaldehyde (37% in
H.sub.2O, 1.12 mL, 13.8 mmol) were dissolved and stirred in
CH.sub.2Cl.sub.2 (40 mL) for 1 h at room temperature. After this
time, the reaction mixture was diluted with additional
CH.sub.2Cl.sub.2 and washed with 1 N NaOH (2.times.) and brine
(1.times.). The combined organic extracts were dried
(Na.sub.2SO.sub.4) and concentrated in vacuo to provide
(2S)-1-methyl-2-(1-methylethyl)-4-(phenylmethyl)piperazine (2.14 g)
as a colorless oil.
[0908] b)
(2S)-1-Methyl-2-(1-methylethyl)-4-(phenylmethyl)piperazine (2.14 g
crude, 9.2 assumed mmol) was dissolved in 20 mL of MeOH. 5% Pd/C
(500 mg) was added, and the contents were thoroughly degassed and
placed under a hydrogen balloon. The resulting reaction mixture was
stirred overnight, and the contents were then degassed and
filtered. 4 N HCl in dioxane (4.6 mL) was added to the filtrate,
and the filtrate was concentrated in vacuo to provide
(2S)-1-methyl-2-(1-methylethyl)piperazine, dihydrochloride
salt.
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S)-4-methyl-3-(1-methylethyl)-1-piperaz-
inyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[0909]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S)-4-methyl-3-(1-methylethyl)-1--
piperazinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure D,
utilizing (2S)-1-methyl-2-(1-methylethyl)piperazine,
dihydrochloride in place of N-methylpiperazine, and using 2
equivalents of DIPEA in Part A. LCMS: (M+H).sup.+: 500.3.
Example 171
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-4-methyl-2-(1-methylethyl)-1-piperaz-
inyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
##STR00193##
[0910] (3S)-1-Methyl-3-(1-methylethyl)piperazine,
dihydrochloride
[0911] a) Commerically-available (S)--N-1-Boc-2-isopropylpiperazine
(2.0 g, 8.76 mmol), sodium triacetoxyborohydride (2.76 g, 13 mmol),
and formaldehyde (37% in H.sub.2O, 1.06 mL, 13 mmol) were dissolved
and stirred in CH.sub.2Cl.sub.2 (40 mL) overnight at room
temperature. After this time, the reaction mixture was diluted with
additional CH.sub.2Cl.sub.2 and washed with 1 N NaOH and brine. The
combined organic extracts were dried (Na.sub.2SO.sub.4) and
concentrated in vacuo to provide 1,1-dimethylethyl
(2S)-4-methyl-2-(1-methylethyl)-1-piperazinecarboxylate (2.18 g) as
a colorless oil.
[0912] b) 1,1-Dimethylethyl
(2S)-4-methyl-2-(1-methylethyl)-1-piperazinecarboxylate (2.18 g
crude, 8.76 assumed mmol) was dissolved in a mixture of MeOH (5
mL), CH.sub.2Cl.sub.2 (5 mL), and 4 N HCl in dioxane (8 mL). After
stirring overnight at room temperature, another 8 mL of 4 N HCl in
dioxane and 8 mL of MeOH were added, which dissolved the white
precipitate that had formed and pushed the reaction to completion.
Evaporation of the solvents in vacuo provided
(3S)-1-methyl-3-(1-methylethyl)piperazine, dihydrochloride (1.97 g)
as a white solid.
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-4-methyl-2-(1-methylethyl)-1-piperaz-
inyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
[0913]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-4-methyl-2-(1-methylethyl)-1--
piperazinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure D,
utilizing ((3S)-1-methyl-3-(1-methylethyl)piperazine,
dihydrochloride in place of N-methylpiperazine, and using 2
equivalents of DIPEA in Part A. LCMS: (M+H).sup.+: 500.3.
Example 172
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00194##
[0914] Part A
Methyl 1-aminocyclopropanecarboxylate
[0915] 1-Aminocyclopropanecarboxylic acid (13.1 g, 129.57 mmol) was
dissolved in MeOH (200 mL), and the resulting mixture was cooled to
0.degree. C. for 30 min. Then thionyl chloride (11.84 mL, 161.97
mmol) was added and the mixture was heated to 80.degree. C. for 4
h. The mixture was allowed to cool to room temperature overnight.
The volatiles were concentrated in vacuo, and the residue was
dissolved in Et.sub.2O (200 mL) and stirred vigorously for 30 min.
The resulting white solid precipitate was collected by filtration
to provide methyl 1-aminocyclopropanecarboxylate (15.83 g, 80%)
LCMS: (M+H).sup.+: 116.1.
Part B
Methyl
1-({[(phenylmethyl)oxy]carbonyl}amino)cyclopropanecarboxylate
[0916] Methyl 1-aminocyclopropanecarboxylate (15.83 g, 104.43 mmol)
was dissolved in a mixture of CH.sub.2Cl.sub.2 (150 mL) and water
(150 mL). To this mixture was added NaHCO.sub.3 (35.09 g, 417.72
mmol) followed by benzyl chloroformate (15.43 mL, 109.64 mmol). The
mixture was stirred vigorously for 2 hours, and after separation of
the two layers, the aqueous layer was extracted with 100 mL of
CH.sub.2Cl.sub.2. The combined organic layers were dried over
MgSO.sub.4, filtered, and concentrated in vacuo to provide methyl
1-({[(phenylmethyl)oxy]carbonyl}amino)cyclopropanecarboxylate (12.0
g, 46%). LCMS: (M+H).sup.+: 206.1.
Part C
Methyl 1-(methyl{[(phenyl
methyl)oxy]carbonyl}amino)cyclopropanecarboxylate
[0917] Sodium hydride (995 mg, 41.466 mmol) was taken up in DMF (50
mL) and was cooled to 0.degree. C. for 30 min. Then a mixture of
methyl
1-({[(phenylmethyl)oxy]carbonyl}amino)cyclopropanecarboxylate (6.46
g, 25.916 mmol) in DMF (25 mL) was slowly added over 10 min. The
resulting mixture was allowed to stir for 45 min, and then
iodomethane (4.84 mL, 77.74 mmol) was added, and the reaction was
allowed to warm to room temperature overnight. The mixture was then
carefully diluted with water (10 mL), and the aqueous layer was
extracted with Et.sub.2O (5.times.50 mL). The organic extracts were
washed with water (5.times.50 mL), then dried over Na.sub.2SO.sub.4
and concentrated in vacuo. The crude residue was purified via
Combiflash, utilizing a 0%-50 EtOAc/Hex gradient to provide methyl
1-(methyl{[(phenylmethyl)oxy]carbonyl}amino)cyclopropanecarboxylate
(16.9 g, >100%) LCMS: (M+H).sup.+: 264.1.
Part D
Methyl 1-(methylamino)cyclopropanecarboxylate
[0918] Methyl
1-(methyl{[(phenylmethyl)oxy]carbonyl}amino)cyclopropanecarboxylate
(assumed 6.8 g, 25.91 mmol, 100% theoretical yield) was dissolved
in 30 mL of MeOH, degassed and placed under argon. 10% Pd/C (2.04
g) was added, and the contents were thoroughly degassed and placed
under a hydrogen balloon overnight. The contents were then
degassed, and the Pd/C was removed by filtration through Celite,
washing with MeOH. The filtrate was concentrated in vacuo to
provide pure methyl 1-(methylamino)cyclopropanecarboxylate (1.53 g,
45% over two step). LCMS: (M+H).sup.+: 130.1.
Part E
Methyl
1-[methyl(N-{[(phenylmethyl)oxy]carbonyl}glycyl)amino]cyclopropanec-
arboxylate
[0919] To a solution of methyl
1-(methylamino)cyclopropanecarboxylate (1.53 g, 11.85 mmol) and
HOBt (1.920 g, 14.21 mmol) in CH.sub.2Cl.sub.2 (30 mL) was added
4-methylmorpholine (5.2 mL, 47.40 mmol),
N-{[(phenylmethyl)oxy]carbonyl}glycine (2.48 g, 11.85 mmol), and
EDCl (2.73 g, 14.21 mmol). After stirring overnight, the solution
was washed 6 N aq. HCl (100 mL) and water (100 mL). The aqueous
layers were extracted with CH.sub.2Cl.sub.2 (1.times.100 mL), and
the combined organic layers were washed with water (100 mL) and
brine (100 mL), then dried over anhydrous MgSO.sub.4 and
concentrated in vacuo to provide pure methyl
1-[methyl(N-{[(phenylmethyl)oxy]carbonyl}glycyl)amino]cyclopropanecarboxy-
late (3.66 g, 97%). LCMS: (M+H).sup.+: 321.1.
Part F
4-Methyl-4,7-diazaspiro[2.5]octane-5,8-dione
[0920] Methyl
1-[methyl(N-{[(phenylmethyl)oxy]carbonyl}glycyl)amino]cyclopropanecarboxy-
late (3.66 g, 11.42 mmol) was dissolved in 50 mL of MeOH, degassed
and placed under argon. 10% Pd/C (2.04 g) was added, and the
contents were thoroughly degassed and placed under a hydrogen
balloon for 2 h. The contents were then degassed, and the Pd/C was
removed by filtration through Celite, washing with MeOH. The
filtrate was concentrated in vacuo. The residue was dissolved in
MeOH (100 mL) and heated to 60.degree. C. with stirring for 4 h.
The solvent was removed in vacuo to provide pure
4-methyl-4,7-diazaspiro[2.5]octane-5,8-dione (1.76 g, 99%). LCMS:
(M+H).sup.+: 155.1.
Part G
4-Methyl-7-(phenylmethyl)-4,7-diazaspiro[2.5]octane-5,8-dione
[0921] Sodium hydride (302 mg, 12.62 mmol) was taken up in DMF (10
mL) and cooled to 0.degree. C. for 30 min. Then a mixture
4-methyl-4,7-diazaspiro[2.5]octane-5,8-dione (1.769 g, 11.47 mmol)
in DMF (5 mL) was slowly added over 10 min. This mixture was
allowed to stir for 45 min, and then benzyl bromide (4.08 mL, 34.41
mmol) was added, and the reaction was stirred for 45 min further.
The mixture was carefully diluted with water (10 mL) and
concentrated in vacuo. The resulting crude product was purified via
reverse phase HPLC to provide
4-methyl-7-(phenylmethyl)-4,7-diazaspiro[2.5]octane-5,8-dione
(1.535 g, 54%). LCMS: (M+H).sup.+: 245.1.
Part H
4-Methyl-7-(phenylmethyl)-4,7-diazaspiro[2.5]octane
[0922]
4-Methyl-7-(phenylmethyl)-4,7-diazaspiro[2.5]octane-5,8-dione
(1.535 g, 6.284 mmol) was dissolved in THF (100 mL) and the mixture
was cooled to 0.degree. C. Borane-THF complex (25.13 mL, 25.13
mmol) was added portionwise over 10 min. The mixture was heated to
60.degree. C. for 4 h and was then checked by LCMS. If greater than
15% of the starting material remained, an additional portion of
Borane-THF complex (12.56 mL, 12.56 mmol) was slowly added, and the
reaction was allowed to stir for an additional 45 min. When the
reaction was complete as determined by LCMS, the reaction mixture
was cooled to room temperature. 1N HCl (25 mL) was added, and the
mixture was heated to 80.degree. C. for 1 h. The reaction mixture
was then cooled to room temperature, and 6 N aq. NaOH was added to
adjust the pH to 14. The mixture was extracted with
CH.sub.2Cl.sub.2 (3.times.50 mL). The combined organic layers were
dried over Na.sub.2SO.sub.4, filtered, and concentrated in vacuo.
The resulting crude product was purified via reverse phase HPLC to
provide 4-methyl-7-(phenylmethyl)-4,7-diazaspiro[2.5]octane (1.43
g, 94%). LCMS: (M+H).sup.+: 217.2.
Part I
4-Methyl-4-aza-7-azoniaspiro[2.5]octane, dihydrochloride
[0923] 4-Methyl-7-(phenylmethyl)-4,7-diazaspiro[2.5]octane (1.43 g,
6.624 mmol) was dissolved in 10 mL of MeOH, degassed and placed
under argon. Pd(OH).sub.2 (140 mg) was added, and the contents were
hydrogenated for 4 h under 50 psi. The contents were then filtered
to remove the catalyst, 1N HCl (14.57 mL, 14.57 mmol) was added to
the filtrate, and the filtrate was concentrated in vacuo to provide
pure 4-methyl-4-aza-7-azoniaspiro[2.5]octane, dihydrochloride (0.8
g, 60%). LCMS: (M+H).sup.+: 127.2.
Part J
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7-yl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0924]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyl-4,7-diazaspiro[2.5]oct-7--
yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide was prepared according to General Procedure E, utilizing
4-methyl-4-aza-7-azoniaspiro[2.5]octane, dihydrochloride in place
of isopropyl amine, and using 3.5 equivalents of DIEA, in Part A.
LCMS: (M+H).sup.+: 484.2.
Example 173
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,3S)-2,3,4-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00195##
[0925] Part A
(2S,3R)-1,2,3-Trimethylpiperazine, hydrochloride salt
[0926] Phenylmethyl (2R,3S)-2,3,4-trimethyl-1-piperazinecarboxylate
(Example 175) (770 mg, 2.94 mmol) was dissolved in 40 mL of MeOH,
degassed and placed under argon. 10% Pd/C (125 mg) was added, and
the contents were thoroughly degassed and placed under a hydrogen
balloon for approximately 3 hrs. The contents were then degassed
and filtered through Celite, and the Celite pad was washed with DCM
and MeOH. After 6.2 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the dihydrochloride salt of
(2S,3R)-1,2,3-trimethylpiperazine. LCMS: (M+H).sup.+: 129.1.
Part B
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,3S)-2,3,4-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
[0927]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,3S)-2,3,4-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure 0 G,
utilizing (2S,3R)-1,2,3-trimethylpiperazine, dihydrochloride salt
in place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 174
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H-
)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
##STR00196##
[0929]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(8aR)-hexahydropyrrolo[1,2-a]pyraz-
in-2(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure D,
utilizing (8aR)-octahydropyrrolo[1,2-a]pyrazine (J. Med. Chem.
1993, 36, 2311-20) (used as the di-HCl salt) in place of
N-methylpiperazine in Part A, and using 3 equivalents of DIPEA in
Part A. LCMS: (M+H).sup.+: 484.2.
Example 175
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,3R)-2,3,4-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00197##
[0930] Part A
Phenyl methyl cis-2,3-dimethyl-1-piperazinecarboxylate
(Enantiomeric Mixture)
[0931] A 100 mL, three-necked round-bottom flask was charged with
cis-2,3-dimethylpiperazine (Helvetica Chimica Acta, 1994, 77,
1057-64) (1.781 g, 15.6 mmol). The flask was cooled in an ice bath,
and a solution of methanesulfonic acid (2.02 mL, 31.2 mmol) in 1.4
mL of water was added slowly, maintaining the temperature below
40.degree. C. The solution was cooled to 20.degree. C., and 2 mL of
ethanol was added. The pH was adjusted to 4 with 60% aqueous
potassium acetate, and then benzyl chloroformate (2.08 mL, 14.8
mmol in 1 mL of THF) and potassium acetate solutions were
simultaneously added dropwise with adjustment of the rate to
maintain the reaction solution at pH 4, with cooling to maintain
the temperature at 25.degree. C. After the mixture was stirred an
additional hour, the organic solvents were removed and the
remaining aqueous solution was washed with ethyl acetate. The ethyl
acetate wash was extracted with 1 M HCl twice to recover the
desired product. The acid extracts were combined with the original
aqueous solution, and the pH was adjusted to 11 by the addition of
6 N NaOH, with cooling to maintain temperature below 40.degree. C.
The aqueous solution was extracted with ethyl acetate, and the
combined extracts were dried over magnesium sulfate and
concentrated in vacuo to provide phenylmethyl
cis-2,3-dimethyl-1-piperazinecarboxylate (enantiomeric mixture) as
a yellow oil (1.77 g, 46%). LCMS: (M+H).sup.+: 249.1.
Part B
Phenylmethyl (2S,3R)-2,3,4-trimethyl-1-piperazinecarboxylate and
phenylmethyl (2R,3S)-2,3,4-trimethyl-1-piperazinecarboxylate
[0932] To a solution of phenylmethyl
cis-2,5-dimethyl-1-piperazinecarboxylate (enantiomeric mixture)
(1.77 g, 7.1 mmol) in dichloromethane (50 mL) at 0.degree. C. was
added formaldehyde (0.803 mL, 37% water solution, 10.7 mmol)
followed by sodium triacetoxyborohydride (1.964 g, 9.2 mmol). The
reaction mixture was allowed to warm to room temperature and
stirred for 2 h before being diluted with dichloromethane and
washed with 1N NaOH solution. The organics were washed with brine,
dried (MgSO.sub.4) and evaporated to yield phenylmethyl
cis-2,3,4-trimethyl-1-piperazinecarboxylate (enantiomeric mixture)
(1.72 g, 92%). Phenylmethyl
(2S,3R)-2,3,4-trimethyl-1-piperazinecarboxylate (950 mg) and
phenylmethyl (2R,3S)-2,3,4-trimethyl-1-piperazinecarboxylate (770
mg) were separated by chiral chromatography. Absolute configuration
was assigned using Ab Initio vibrational circular dichroism. LCMS:
(M+H).sup.+: 263.3.
Part C
(2R,3S)-1,2,3-Trimethylpiperazine, dihydrochloride salt
[0933] Phenylmethyl (2S,3R)-2,3,4-trimethyl-1-piperazinecarboxylate
(950 mg, 3.62 mmol) was dissolved in 60 mL of MeOH, degassed and
placed under argon. 10% Pd/C (160 mg) was added, and the contents
were thoroughly degassed and placed under a hydrogen balloon for
approximately 3 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
After 7.6 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the dihydrochloride salt of
(2R,3S)-1,2,3-trimethylpiperazine (740 mg). LCMS: (M+H).sup.+:
129.1.
Part D
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,3R)-2,3,4-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
[0934]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,3R)-2,3,4-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure G,
utilizing (2R,3S)-1,2,3-trimethylpiperazine, dihydrochloride salt
in place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 176
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-
-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformami-
de
##STR00198##
[0935] Part A
1-[1-(Diphenylmethyl)-3-methyl-3-azetidinyl]pyrrolidine
[0936] A mixture of 1-(diphenylmethyl)-3-methyl-3-azetidinyl
methanesulfonate (1.55 g, 4.68 mmol) (J. Med. Chem. 1993, 36,
801-810) and pyrrolidine (3.86 ml, 46.68 mmol) in isopropanol (15
ml) was heated to 70.degree. C. overnight. After cooling to room
temperature, the mixture was concentrated to dryness in vacuo.
Water (100 ml) was added, and the mixture was extracted with
dichloromethane (2.times.100 ml). The combined organic solution was
washed with brine (60 ml), dried (Na.sub.2SO.sub.4) and
concentrated. The residue was purified via RP-HPLC to provide
1-[1-(diphenylmethyl)-3-methyl-3-azetidinyl]pyrrolidine (0.94 g,
65%). LCMS: (M+H).sup.+: 307.2.
Part B
1-(3-Methyl-3-azetidinyl)pyrrolidine dihydrochloride
[0937] A mixture of
1-[1-(diphenylmethyl)-3-methyl-3-azetidinyl]pyrrolidine (0.94 g,
3.07 mmol) and 20% Pd(OH).sub.2 (0.11 g) in ethanol (30 ml) and 1N
HCl (7 ml) was treated with H.sub.2 at 60 psi overnight. The
catalyst was removed by filtration, and the filtrate was evaporated
under vacuum. The residue was washed with benzene (3.times.5 ml)
and dried under high vacuum to provide
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride (0.76 g,
presumed 86% pure). LCMS: (M+H).sup.+: 141.0.
Part C
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-4-pyrim-
idinyl}-1,1,2-hydrazinetricarboxylate
[0938] To a stirred solution of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride (0.128 g, 86%
pure, 0.52 mmol) in DMF (8 mL) at 0.degree. C. was added DIPEA
(0.34 mL, 1.94 mmol) followed immediately by
tris(1,1-dimethylethyl)-2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hyd-
razinetricarboxylate (0.24, 0.49 mmol). The reaction was warmed up
to rt and stirred overnight. The mixture was purified by RP-HPLC to
provide tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-4-pyrim-
idinyl}-1,1,2-hydrazinetricarboxylate (0.225 g, 77%). LCMS:
(M+H).sup.+: 601.2.
Part D
2-Chloro-5-fluoro-4-hydrazino-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-
pyrimidine
[0939] A solution of tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-4-pyrim-
idinyl}-1,1,2-hydrazinetricarboxylate (0.225 g, 0.37 mmol) in MeOH
(6 mL) and 4.0M HCl in dioxane (4 mL) was stirred at room
temperature for 3 days. The solvent was then removed in vacuo,
providing the crude
2-chloro-5-fluoro-6-hydrazino-N-(1-methylethyl)-4-pyrimidinamine,
presumably as the tri-HCl salt. LCMS: (M+H).sup.+: 301.0.
Part E
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-
-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-
-pyran-2-yloxy)formamide
[0940] A mixture of
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (112 mg, 0.374 mmol),
2-chloro-5-fluoro-4-hydrazino-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl-
]pyrimidine (assumed 112 mg of free base, 0.374 mmol), EDC (86 mg,
0.449 mmol), HOAt (56 mg, 0.411 mmol), and NMM (0.25 mL, 2.24 mmol)
in DMF (5 ml) was stirred at room temperature overnight. The
reaction mixture was then purified via RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl-
]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2-
H-pyran-2-yloxy)formamide (145 mg, 66%). LCMS: (M+H).sup.+:
582.5.
Part F
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-
-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformami-
de
[0941] A solution of
[(2R)-3-(2-{2-chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl-
]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide (145 mg)
in 4:1 AcOH:water (20 mL) was stirred at room temperature
overnight. LCMS indicated .about.45% completion of the
deprotection. Another portion of the mixed solvents (4:1
AcOH:water, 20 mL) was added, and stirring continued overnight. The
solvents were then removed in vacuo, and the resulting crude
product was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl-
]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformam-
ide (45 mg, 36%). LCMS: (M+H).sup.+: 498.2.
Example 177
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(8aR)-hexahydropyrrolo[1,2-a-
]pyrazin-2(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfo-
rmamide
##STR00199##
[0943]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(8aR)-hexahydropyrrol-
o[1,2-a]pyrazin-2(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure A,
utilizing (8aR)-octahydropyrrolo[1,2-a]pyrazine (J. Med. Chem.
1993, 36, 2311-20) (used as the di-HCl salt) in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 464.2.
Example 178
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(8aR)-hexahydropyrro-
lo[1,2-a]pyrazin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide
##STR00200##
[0945]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{2-ethyl-5-fluoro-6-[(8aR)-hexahyd-
ropyrrolo[1,2-a]pyrazin-2(1H)-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide was prepared according to General Procedure B,
utilizing (8aR)-octahydropyrrolo[1,2-a]pyrazine (J. Med. Chem.
1993, 36, 2311-20) (used as the di-HCl salt) in place of
pyrrolidine in Part A, using 4 equivalents of DIPEA, and using a
mixed solvent system of 1:1 MeOH:DMSO in place of pure MeOH or pure
DMSO.
Example 179
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimidi-
nyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00201##
[0946] Part A
Tris(1,1-dimethylethyl)
2-[2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimidinyl]-1,1-
,2-hydrazinetricarboxylate
[0947] A solution of commercially available
tetrahydro-2H-pyran-4-amine (0.122 g, 1.21 mmol) in DMF (6 mL) was
cooled to 0.degree. C. Then diisopropylethylamine (0.24 mL, 1.33
mmol) and tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.600 g, 1.21 mmol) were added. The resulting solution was left to
reach room temperature and stir overnight. The mixture was
extracted with ether and washed with water, and the resulting
aqueous layer was extracted once with ether. The combined ether
layers were dried (Na.sub.2SO.sub.4) and concentrated in vacuo. The
resulting material was purified by silica gel chromatography with
(5-60% ethyl acetate in hexanes, 1% triethylamine) to provide
tris(1,1-dimethylethyl)
2-[2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimidinyl]-1,1-
,2-hydrazinetricarboxylate as a white solid (0.602 g, 89%). LCMS:
(M+H-2Boc).sup.+=362.1.
Part B
2-Chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4(1H)-pyrimidinone
hydrazone
[0948] To a solution of tris(1,1-dimethylethyl)
2-[2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimidinyl]-1,1-
,2-hydrazinetricarboxylate (0.602 g, 1.071 mmol) in MeOH (20 mL)
was added 4M HCl in 1,4-dioxane (20 mL). After stirring at room
temperature for 2 days, the solvent was evaporated and saturated
NaHCO.sub.3 was added. The aqueous layer was extracted, and the
organics were dried (Na.sub.2SO.sub.4) and concentrated in vacuo to
provide
2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4(1H)-pyrimidinone
hydrazone as a red solid (0.199 g). LCMS: (M+H).sup.+=261.8.
Part C
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimidi-
nyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formam-
ide
[0949]
(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propan-
oic acid (0.220 g, 0.72 mmol),
2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4(1H)-pyrimidinone
hydrazone (0.199 g), NMM (0.42 mL, 3.80 mmol), HOAt (0.103 g, 0.76
mmol), EDC (0.146 g, 0.76 mmol) were dissolved in DMF (5 mL).
Reaction left to stir overnight. Added ether, washed with water,
back extracted aqueous layers with ether, dried (Na.sub.2SO.sub.4)
and concentrated in vacuo to provide
[(2R)-3-{2-[2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-
-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)o-
xy]formamide as a dark brown solid (0.321 g). LCMS:
(M+H).sup.+=549.2.
Part D
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimidi-
nyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0950]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy-
]formamide (0.321 g, 0.58 mmol), Pd(OH).sub.2 (0.064 g) and MeOH
(10 mL) were combined and treated as described in General Procedure
E, Part D, for 4 hours. The reaction was not complete, and
therefore the contents were filtered to remove the catalyst, and
the filtrate was concentrated in vacuo. The resulting residue was
redissolved in MeOH (10 mL), Pd(OH).sub.2 (0.080 g) was, and the
contents were again stirred under hydrogenation conditions as
described in General Procedure E, Part D, for 2.5 hours. The
contents were then filtered to remove the catalyst, and the
filtrate was concentrated in vacuo. The resulting crude product was
purified by RP-HPLC to provide
[(2R)-3-{2-[2-chloro-5-fluoro-6-(tetrahydro-2H-pyran-4-ylamino)-4-pyrimid-
inyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
as an off-white solid (0.024 g, 9%). LCMS: (M+H).sup.+=459.5.
Example 180
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2S,3R)-2,3,4-tri-
methyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00202##
[0952]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2S,3R)-2,-
3,4-trimethyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure A,
utilizing (2R,3S)-1,2,3-trimethylpiperazine, dihydrochloride salt
(Example 175) in place of pyrrolidine in Part A, and using 3
equivalents of DIPEA. LCMS: (M+H).sup.+: 466.2.
Example 181
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2R,3S)-2,3,4-tri-
methyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00203##
[0954]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2R,3S)-2,-
3,4-trimethyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure A,
utilizing (2S,3R)-1,2,3-trimethylpiperazine, dihydrochloride salt
(Example 173) in place of pyrrolidine in Part A, and using 3
equivalents of DIPEA. LCMS: (M+H).sup.+: 466.2.
Example 182
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-methyl-3-(1-pyrro-
lidinyl)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformami-
de
##STR00204##
[0955] Part A
5-Fluoro-4-hydrazino-2-methyl-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl]-
pyrimidine
[0956] To a mixture of 4,6-dichloro-5-fluoro-2-methylpyrimidine (90
mg, 0.50 mmol), 1-(3-methyl-3-azetidinyl)pyrrolidine
dihydrochloride (Example 176) (131 mg, assumed 86% pure, 0.53 mmol)
in 5 mL of DMSO was added DIPEA (0.345 mL, 1.98 mmol). The
resulting reaction mixture was stirred at rt overnight, and then
hydrazine monohydrate was added (0.5 mL) and the contents were
heated to 80.degree. C. for 4 h. The reaction mixture was then
cooled to room temperature and purified by RP-HPLC to provide
5-fluoro-4-hydrazino-2-methyl-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl-
]pyrimidine (100 mg, 71%). LCMS: (M+H).sup.+: 281.0.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-methyl-3-(1-pyrro-
lidinyl)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-
-pyran-2-yloxy)formamide
[0957] A mixture of
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (107 mg, 0.357 mmol),
5-fluoro-4-hydrazino-2-methyl-6-[3-methyl-3-(1-pyrrolidinyl)-1-azetidinyl-
]pyrimidine (100 mg, 0.357 mmol), EDC (82 mg, 0.428 mmol), HOAt (53
mg, 0.393 mmol), and NMM (0.20 mL, 1.79 mmol) in DMF (5 ml) was
stirred at room temperature overnight. The reaction mixture was
then purified via RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-methyl-3-(1-pyrr-
olidinyl)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2-
H-pyran-2-yloxy)formamide (118 mg, 58%). LCMS: (M+H).sup.+:
562.2.
Part C
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-methyl-3-(1-pyrro-
lidinyl)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformami-
de
[0958] A solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-methyl-3-(1-pyrr-
olidinyl)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2-
H-pyran-2-yloxy)formamide (118 mg) in 4:1 AcOH:water (20 mL) was
stirred at room temperature for 3 days. The solvents were removed
in vacuo, and the resulting crude product was purified by RP-HPLC
to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[3-methyl-3-(1-pyrr-
olidinyl)-1-azetidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformam-
ide (65 mg, 64%). LCMS: (M+H).sup.+: 478.1.
Example 183
{(2R)-2-[(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrim-
idinyl}hydrazino)carbonyl]hexyl}hydroxyformamide
##STR00205##
[0960]
{(2R)-2-[(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro--
4-pyrimidinyl}hydrazino)carbonyl]hexyl}hydroxyformamide was
prepared according to General Procedure E, utilizing
(R)-1,3-dimethylpiperazine dihydrochloride (Example 39) in place of
isopropyl amine in Part A, 2.0 M HCl in ether with DCM as a solvent
in Part B, and (2R)-2-{[formyl(hydroxy)amino]methyl}hexanoic acid
(Example 201) in place of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in Part C. LCMS: (M+H).sup.+: 446.1/448.2.
Example 184
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4,4,5-trimethylhexahydropyrrolo[3,4-c]pyr-
rol-2(1H)-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]h-
ydroxyformamide (Mixture of Diastereomers)
##STR00206##
[0961] Part A
(Rac)-cis-1,1,2-trimethyl-5-(phenylmethyl)octahydropyrrolo[3,4-c]pyrrole
[0962]
4,4,5-Trimethyl-2-(phenylmethyl)tetrahydropyrrolo[3,4-c]pyrrole-1,3-
(2H,3aH)-dione (5.39 g, 20 mmol) (Bull. Chem. Soc. Jpn., 1987, 60,
4079-4089) was dissolved in THF (50 mL) and cooled to 0.degree. C.
LiAlH.sub.4 (2.25 g, 59 mmol) was added portionwise and the
resulting mixture was refluxed overnight. Upon cooling to 0.degree.
C., the reaction was quenched by the addition of water (2.25 mL),
followed by 15% (w/w) NaOH (aq) (2.25 mL) and another portion of
water (6.75 mL). The quenched reaction was stirred and then
filtered through Celite, before being concentrated under reduced
pressure. Purification by RP-HPLC yielded
(rac)-cis-1,1,2-trimethyl-5-(phenylmethyl)octahydropyrrolo[3,4-c]-
pyrrole (1.44 g, 30%). LCMS: (M+H).sup.+: 245.2.
Part B
(Rac)-cis-1,1,2-trimethyloctahydropyrrolo[3,4-c]pyrrole
[0963] To a degassed solution of
(rac)-cis-1,1,2-trimethyl-5-(phenylmethyl)octahydropyrrolo[3,4-c]pyrrole
(1.44 g, 6 mmol) in MeOH (30 mL) was added 1 M HCl (12.3 mL, 12
mmol) followed by 10% Pd/C (220 mg). The resulting mixture was
stirred overnight under a hydrogen balloon. Filtration of the
catalyst and evaporation of the solvents in vacuo yielded
(rac)-cis-1,1,2-trimethyloctahydropyrrolo[3,4-c]pyrrole in
quantitative yield as a hydrochloride salt. LCMS: (M+H).sup.+:
155.1.
Part C
[(2R)-3-{2-[2-chloro-5-fluoro-6-(4,4,5-trimethylhexahydropyrrolo[3,4-c]pyr-
rol-2(1H)-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]h-
ydroxyformamide
[0964]
[(2R)-3-{2-[2-chloro-5-fluoro-6-(4,4,5-trimethylhexahydropyrrolo[3,-
4-c]pyrrol-2(1H)-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxop-
ropyl]hydroxyformamide was prepared according to General Procedure
E, utilizing
rac-(cis)-1,1,2-trimethyloctahydropyrrolo[3,4-c]pyrrole in place of
isopropyl amine in Part A. The product was a mixture of
diastereomers. LCMS: (M+H).sup.+: 512.3/514.2.
Example 185
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-(dimethylamino)-3-methyl-1-azetidin-
yl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfo-
rmamide
##STR00207##
[0966]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-(dimethylamino)-3-methyl-1-a-
zetidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hy-
droxyformamide was prepared according to General Procedure C,
utilizing N,N,3-trimethyl-3-azetidinamine (J. Med. Chem. 1993, 36,
801-810) in place of azetidine hydrochloride in Part A. LCMS:
(M+H).sup.+484.1.
Example 186
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(cis)-10-oxa-4-azat-
ricyclo[5.2.1.0.sup.2,6]dec-4-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide
##STR00208##
[0967] Part A
(cis)-4-(Phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]dec-8-ene-3,5--
dione
[0968] Furan (6 mL, 83 mmol) was added to a solution of
N-benzylmaleimide (3 g, 16 mmol) in ether (30 mL) in a sealed tube
and the reaction was heated to 90.degree. C. overnight. Evaporation
of the solvent yielded a residue which was triturated with cold
MeOH to give
(cis)-4-(phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]dec-8-ene-3,5-
-dione (2.72 g, 67%) as an off white solid. LCMS: (M+Na).sup.+:
278.1.
Part B
(cis)-4-(Phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane-3,5-dio-
ne
[0969] To a degassed solution of
(cis)-4-(phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]dec-8-ene-3,5-
-dione (2.72 g, 10.1 mmol) in 1,2 DME (50 mL) was added 10% Pd/C
(540 mg, 20% w/w). The resulting suspension was stirred under a
hydrogen balloon for 1 hour. Removal of the catalyst by filtration
and concentration of the filtrate in vacuo yielded
(cis)-4-(phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane-3,5-di-
one in quantitative yield. LCMS: (M+H).sup.+: 258.1.
Part C
(cis)-4-(Phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane
[0970] To a solution of
(cis)-4-(phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane-3,5-di-
one (2.39 g, 9.2 mmol) in THF (93 mL) at 0.degree. C. was added
LiAlH.sub.4 and the resulting solution was heated to 65.degree. C.
The reaction was allowed to stir at this temperature for 72 hours
before being cooled to 0.degree. C. and quenched with 1 M NaOH. The
quenched reaction was then extracted with ether, the combined
organics were dried over sodium sulfate and the solvent was removed
in vacuo. The residual material was dissolved in DCM, dried over
sodium sulfate, concentrated and purified by gradient silica gel
chromatography (0-100% EtOAc in hexane, 1% Et.sub.3N) yielding
(cis)-4-(phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane
as a yellow oil (1.72 g, 67%). LCMS: (M+H).sup.+: 230.1.
Part D
(cis)-10-Oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane
[0971] To a degassed solution of
(cis)-4-(phenylmethyl)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane
(1.72 g, 7.5 mmol) in MeOH (40 mL) was added 1 M HCl (7.5 mL)
followed by 10% Pd/C (344 mg, 20% w/w). Stirring under a hydrogen
balloon for 72 hours followed by filtration and concentration in
vacuo yielded the hydrochloride of
(cis)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane (1.26 g, 96%) as
a yellow foam. LCMS: (M+H).sup.+: 140.1.
Part E
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(cis)-10-oxa-4-azat-
ricyclo[5.2.1.0.sup.2,6]dec-4-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide
[0972]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(cis)-10-oxa-
-4-azatricyclo[5.2.1.0.sup.2,6]dec-4-yl]-4-pyrimidinyl}hydrazino)-3-oxopro-
pyl]hydroxyformamide was prepared according to General Procedure A,
utilizing (cis)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane in
place of pyrrolidine in Part A. LCMS: (M+H).sup.+: 477.3.
Example 187
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(cis)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,-
6]dec-4-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide
##STR00209##
[0974]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(cis)-10-oxa-4-azatricyclo[5.2.1.0-
.sup.2,6]dec-4-yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopro-
pyl]hydroxyformamide was prepared according to General Procedure E,
utilizing (cis)-10-oxa-4-azatricyclo[5.2.1.0.sup.2,6]decane
(Example 186) in place of isopropyl amine in Part A and 2.0 M HCl
in ether with DCM as a solvent in part B. LCMS: (M+H).sup.+:
497.1/499.2.
Example 188
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(9aR)-octahydro-2H--
pyrido[1,2-a]pyrazin-2-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide
##STR00210##
[0975] Part A
Methyl
(2R)-1-(N-{[(phenylmethyl)oxy]carbonyl}glycyl)-2-piperidinecarboxyl-
ate
[0976] To a solution of methyl (2R)-2-piperidinecarboxylate
hydrochloride (1.0 g, 5.56 mmol) and HOBt (0.90 g, 6.67 mmol) in
CH.sub.2Cl.sub.2 (20 mL) was added 4-methylmorpholine (2.44 mL,
22.24 mmol), N-{[(phenylmethyl)oxy]carbonyl}glycine (1.16 g, 5.56
mmol), and EDCl (1.28 g, 6.67 mmol). After stirring overnight, the
solution was washed 6 N aq. HCl (100 mL) and water (100 mL). The
aqueous layer was extracted with CH.sub.2Cl.sub.2 (3.times.50 mL).
The combined organic layers were washed with water (50 mL) and
brine (50 mL), and then dried over anhydrous MgSO.sub.4 and
concentrated in vacuo to provide methyl
(2R)-1-(N-{[(phenylmethyl)oxy]carbonyl}glycyl)-2-piperidinecarboxylate
(2.029 g, 99%). LCMS: (M+H).sup.+: 335.1.
Part B
(9aR)-Tetrahydro-2H-pyrido[1,2-a]pyrazine-1,4(3H,6H)-dione
[0977] Methyl
(2R)-1-(N-{[(phenylmethyl)oxy]carbonyl}glycyl)-2-piperidinecarboxylate
(2.029 g, 6.068 mmol) was dissolved in MeOH (30 mL), degassed and
placed under argon. 10% Pd/C (610 mg) was added, and the contents
were thoroughly degassed and placed under a hydrogen balloon for 3
h. The contents were then degassed, and the Pd/C was removed by
filtration through Celite, washing with MeOH. The filtrate was
concentrated in vacuo to provide pure
(9aR)-tetrahydro-2H-pyrido[1,2-a]pyrazine-1,4(3H,6H)-dione (779 mg,
76%). LCMS: (M+H).sup.+: 169.1.
Part C
Phenylmethyl
(9aR)-octahydro-2H-pyrido[1,2-a]pyrazine-2-carboxylate
[0978] (9aR)-Tetrahydro-2H-pyrido[1,2-a]pyrazine-1,4(3H,6H)-dione
(779 mg, 4.63 mmol) was dissolved in 46 mL of THF and cooled to
0.degree. C. LiAlH.sub.4 (352 mg, 9.57 mmol) was then added portion
wise. The mixture was heated to 85.degree. C. for 2 hours, then
cooled to 0.degree. C. The reaction was quenched with sodium
sulphate decahydrate (704 mg, 9.27 mmol) and was stirred at
0.degree. C. for 30 min. To this solution was added 1N aq. NaOH (5
mL) and the reaction mixture was stirred at 0.degree. C. for 30
min. Then Et.sub.2O (20 mL) was added, followed by benzyl
chloroformate (0.783 mL, 5.563 mmol). The reaction mixture was
stirred vigorously at 0.degree. C. for 2 h, the phases were
separated, and the aqueous phase was extracted with Et.sub.2O
(3.times.50 mL). The combined organic phase was dried over
anhydrous MgSO.sub.4, filtered, and concentrated in vacuo. The
resulting crude product was purified by RP-HPLC to provide
phenylmethyl (9aR)-octahydro-2H-pyrido[1,2-a]pyrazine-2-carboxylate
(688 mg, 55%). LCMS: (M+H).sup.+: 275.1.
Part D
(9aR)-Octahydro-2H-pyrido[1,2-a]pyrazine
[0979] Phenylmethyl
(9aR)-octahydro-2H-pyrido[1,2-a]pyrazine-2-carboxylate (688 mg,
2.50 mmol) was dissolved in MeOH (15 mL), degassed and placed under
argon. 10% Pd/C (206 mg) was added, and the contents were
thoroughly degassed and placed under a hydrogen balloon for 2 h.
The contents were then degassed, and the Pd/C was removed by
filtration through Celite, washing with MeOH. The filtrate was
concentrated in vacuo to provide pure
(9aR)-octahydro-2H-pyrido[1,2-a]pyrazine (364 mg, 99%). LCMS:
(M+H).sup.+: 141.1.
Part E
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(9aR)-octahydro-2H--
pyrido[1,2-a]pyrazin-2-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfor-
mamide
[0980]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(9aR)-octahy-
dro-2H-pyrido[1,2-a]pyrazin-2-yl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide was prepared in a manner similar to Example 210, Part
E and F, utilizing (9aR)-octahydro-2H-pyrido[1,2-a]pyrazine in
place of 1-{1-[(2S)-2-pyrrolidinyl]cyclopropyl}pyrrolidine
hydrochloride in Part E. LCMS: (M+H).sup.+: 478.4.
Example 189
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[1-(dimethylamino)cyclopropyl]-1-pyrrolidin-
yl}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hy-
droxyformamide
##STR00211##
[0981] Part A
N,N-Dimethyl-1-[(2S)-2-pyrrolidinyl]cyclopropanamine
[0982] N,N-Dimethyl-1-[(2S)-2-pyrrolidinyl]cyclopropanamine
prepared according to Example 210, Part A through Part D, utilizing
commercially-available dimethyl amine in place of pyrrolidine in
Part B. LCMS: (M+H).sup.+: not detected.
Part B
[0983]
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[1-(dimethylamino)cyclopropyl]-1-pyr-
rolidinyl}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopr-
opyl]hydroxyformamide was prepared according to General Procedure
E, utilizing N,N-dimethyl-1-[(2S)-2-pyrrolidinyl]cyclopropanamine
in place of isopropyl amine in Part A. LCMS: (M+H).sup.+:
512.3.
Example 190
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(4-pyrid-
inyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydroxyformamide
##STR00212##
[0984] Part A
6-Chloro-5-fluoro-N,2-dimethyl-N-[2-(4-pyridinyl)ethyl]-4-pyrimidinamine
[0985] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (280 mg, 1.54 mmol)
was dissolved in 5 mL of THF and stirred at room temperature.
Methyl[2-(4-pyridinyl)ethyl]amine (210 mg, 1.54 mmol) was added,
followed by triethylamine (240 .mu.L, 1.69 mmol). The resulting
reaction mixture was stirred overnight. The reaction was diluted
with EtOAc, washed with brine, was dried (sodium sulfate) and was
evaporated to provide
6-chloro-5-fluoro-N,2-dimethyl-N-[2-(4-pyridinyl)ethyl]-4-pyrimidinamine
(350 mg, 81%) that was used without further purification. LCMS:
(M+H).sup.+: 281.1.
Part B
5-Fluoro-6-hydrazino-N,2-dimethyl-N-[2-(4-pyridinyl)ethyl]-4-pyrimidinamin-
e
[0986]
6-Chloro-5-fluoro-N,2-dimethyl-N-[2-(4-pyridinyl)ethyl]-4-pyrimidin-
amine (350 mg, 1.25 mmol) was dissolved in 4 ml of DMSO and 4 ml of
hydrazine monohydrate was added. The mixture was stirred overnight
and was purified by RP-HPLC to provide
5-fluoro-6-hydrazino-N,2-dimethyl-N-[2-(4-pyridinyl)ethyl]-4-pyrimidinami-
ne (220 mg, 63%). LCMS: (M+H).sup.+: 277.2.
Part C
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(4-pyridin-
yl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}[(phenylmethyl)oxy]fo-
rmamide
[0987] A mixture of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (230 mg, 0.76 mmol),
5-fluoro-6-hydrazino-N,2-dimethyl-N-[2-(4-pyridinyl)ethyl]-4-pyrimidinami-
ne (210 mg, 0.76 mmol), EDC (180 mg, 0.91 mmol), HOAt (120 mg, 0.91
mmol), and NMM (0.25 mL, 2.28 mmol) in 5 ml DMF was stirred at room
temperature overnight. The reaction mixture was then purified via
reverse phase HPLC to provide
{(2R)-2-(cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(4-pyridi-
nyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}[(phenylmethyl)oxy]f-
ormamide (290 mg, 67%). LCMS: (M+H).sup.+: 564.3.
Part D
N-{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(4-pyrid-
inyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}-N-hydroxyformamide
[0988]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(4--
pyridinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}[(phenylmethyl-
)oxy]formamide (290 mg, 0.51 mmol) was dissolved in 10 mL of MeOH.
10% Pd/carbon (60 mg) was added, and the contents were stirred
under a hydrogen balloon for approximately 5 h. The contents were
then filtered to remove the catalyst, and the filtrate was
concentrated in vacuo to provide
{(2R)-2-(cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{methyl[2-(-
4-pyridinyl)ethyl]amino}-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyforma-
mide (230 mg, 96%). LCMS: (M+H).sup.+: 474.3.
Example 191
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00213##
[0989] Part A
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidinyl}-1,1-
,2-hydrazinetricarboxylate
[0990] Tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.988 g, 1.992 mmol) was dissolved in THF (10 mL). To this
solution was added triethylamine (0.61 mL, 4.3765 mmol), followed
by commercially available 2-aminomethyl thiazole hydrochloride
(0.30 g, 1.992 mmol), which was suspended in THF (12 mL). The
reaction was left to stir for 2 days during which time an
additional 10 mL THF and 2-aminomethyl thiazole hydrochloride
(0.061 g, 0.4049 mmol) were added to the reaction mixture. After 3
more days, the reaction mixture was diluted with water and
extracted with ethyl acetate. The organics were dried
(Na.sub.2SO.sub.4) and concentrated. The resulting crude material
was purified by silica gel chromatography (0-100% ethyl acetate in
hexanes) to provide tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidinyl}-1,1-
,2-hydrazinetricarboxylate as a yellow oil (0.5826, 51%). LCMS:
(M+H-3 Boc).sup.+=375.0.
Part B
2-Chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4(1H)-pyrimidinone
hydrazone dihydrochloride
[0991] Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidinyl}-1,1-
,2-hydrazinetricarboxylate (0.5826, 1.015 mmol) was dissolved in
MeOH (10 mL) and HCl (4M in 1,4-dioxane) (10 mL) at room
temperature and stirred overnight. Removal of the solvents in vacuo
provided
2-chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4(1H)-pyrimidinone
hydrazone, presumed dihydrochloride, as a beige solid (0.3507,
100%). LCMS: (M+H).sup.+=274.8.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yl-
oxy)formamide
[0992]
2-Chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4(1H)-pyrimidin-
one hydrazone dihydrochloride (0.3052 g, 0.882 mmol) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.457 g, 1.059 mmol) were dissolved in DMF (8 mL).
NMM (0.58 mL, 5.2753 mmol) was added, followed by HOAt (0.144 g,
1.059 mmol) and EDC (0.203 g, 1.059 mmol). After stirring
overnight, the reaction mixture was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-y-
loxy)formamide as a beige solid (0.3031 g, 62%). LCMS:
(M+H).sup.+=556.2.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0993]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyr-
an-2-yloxy)formamide (0.3031 g, 0.5461 mmol) was dissolved in
acetic acid (8 mL) and water (2 mL). This reaction mixture was
stirred overnight. The volatiles were evaporated and reaction
mixture was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1,3-thiazol-2-ylmethyl)amino]-4-
-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
as a white solid (0.1484 g, 58%). LCMS: (M+H).sup.+=472.0.
Example 192
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-py-
rimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00214##
[0994] Part A
N-Methyl-1-(1,3-thiazol-2-yl)methanamine
[0995] Commercially available 2-thiazole carboxaldehyde (3.61 g,
31.91 mmol) was dissolved in isopropanol (90 mL), and sieves (3.65
g) were added to reaction vessel. Then methylamine hydrochloride
(17.28 g, 256 mmol), sodium acetate (7.85 g, 96 mmol) and sodium
cyanoborohydride (3.07 g, 48.9 mmol) were added to the reaction
mixture. The mixture was placed under argon and stirred for 3 days.
The sieves were filtered away and rinsed with isopropanol. The
filtrate was evaporated, and the resulting residue was dissolved in
ethyl acetate. The organics were washed with saturated aqueous
NaHCO.sub.3 and brine. The combined aqueous layers were extracted
with 1 L of 10% MeOH in chloroform solvent mixture, and the
combined organics were dried (Na.sub.2SO.sub.4) and evaporated. The
crude product was purified by silica gel chromatography (0-5% MeOH
in dichloromethane) to produce
N-methyl-1-(1,3-thiazol-2-yl)methanamine as a yellow oil (0.930 g,
23%). LCMS: (M+H).sup.+=129.0.
Part B
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidiny-
l}-1,1,2-hydrazinetricarboxylate
[0996] Tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(1.16 g, 2.339 mmol) was dissolved in THF (5 mL). To this solution
was added triethylamine (0.39 mL, 2.8 mmol), followed by
N-methyl-1-(1,3-thiazol-2-yl)methanamine (0.30 g, 2.3437 mmol) in
THF (2 mL). The reaction was left to stir overnight. Then the
reaction mixture was diluted with water, and the aqueous layer was
extracted with ethyl acetate. The organics were dried
(Na.sub.2SO.sub.4) and concentrated to produce
tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidiny-
l}-1,1,2-hydrazinetricarboxylate as a white solid (1.51 g). LCMS:
(M+H-Boc).sup.+=489.1.
Part C
2-Chloro-5-fluoro-6-hydrazino-N-methyl-N-(1,3-thiazol-2-ylmethyl)-4-pyrimi-
dinamine dihydrochloride
[0997] Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-pyrimidiny-
l}-1,1,2-hydrazinetricarboxylate (1.51 g, 2.57 mmol) was dissolved
in MeOH (25 mL) and HCl (4M in 1,4-dioxane) (25 mL) at room
temperature. The reaction mixture was left to stir over 4 days and
then evaporated to provide
2-chloro-5-fluoro-6-hydrazino-N-methyl-N-(1,3-thiazol-2-ylmethyl)-
-4-pyrimidinamine, assumed dihydrochloride, as a beige solid
(0.9034 g, 98%). LCMS: (M+H-2HCl).sup.+=289.0.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-py-
rimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyra-
n-2-yloxy)formamide
[0998]
2-Chloro-5-fluoro-6-hydrazino-N-methyl-N-(1,3-thiazol-2-ylmethyl)-4-
-pyrimidinamine (assumed dihydrochloride) (0.9034 g, 2.509 mmol)
and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (1.299 g, 3.01 mmol) were dissolved in DMF (13 mL).
NMM (1.655 mL, 15.05 mmol) was added, followed by HOAt (0.4095 g,
3.01 mmol) and EDC (0.577 g, 3.01 mmol). After stirring overnight,
the reaction mixture was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyr-
an-2-yloxy)formamide as a red sticky material. LCMS:
(M+H).sup.+=570.2.
Part E
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-py-
rimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[0999]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amin-
o]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro--
2H-pyran-2-yloxy)formamide was dissolved in acetic acid (8 mL) and
water (2 mL). The reaction mixture was left to stir 2 days. The
volatiles were evaporated, and the resulting residue was purified
by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[methyl(1,3-thiazol-2-ylmethyl)amino]-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
as a beige solid (0.3469 g). LCMS: (M+H).sup.+=486.1.
Example 193
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[(3S)-1-methyl-2-oxohexahydro-1H-azepin-3-
-yl]amino}-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide
##STR00215##
[1000] Part A
1,1-Dimethylethyl[(3S)-1-methyl-2-oxohexa
hydro-1H-azepin-3-yl]carbamate
[1001] To a degassed solution of
1,1-dimethylethyl[(3S)-1-methyl-2-oxo-2,3,4,7-tetrahydro-1H-azepin-3-yl]c-
arbamate (Example 94) (680 mg, 2.8 mmol) in MeOH (20 mL) was added
10% Pd/C (100 mg) and the resulting suspension was stirred
overnight under a balloon of hydrogen. Filtration of the catalyst
and concentration of the filtrate under reduced pressure yielded
1,1-dimethylethyl[(3S)-1-methyl-2-oxohexahydro-1H-azepin-3-yl]carbamate
(470 mg, 88%). LCMS: (M-.sup.tBut).sup.+: 186.2.
Part B
(3S)-3-Amino-1-methylhexahydro-2H-azepin-2-one
[1002] To a solution of
1,1-dimethylethyl[(3S)-1-methyl-2-oxohexahydro-1H-azepin-3-yl]carbamate
(470 mg, 1.9 mmol) in dioxane (5 mL) was added HCl (4.8 mL, 19
mmol, 4M in dioxane), and the reaction was stirred overnight.
Evaporation of the solvent gave a quantitative yield of
(3S)-3-amino-1-methylhexahydro-2H-azepin-2-one. LCMS: (M+H).sup.+:
143.1.
Part C
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[(3S)-1-methyl-2-oxohexahydro-1H-azepin-3-
-yl]amino}-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide
[1003]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[(3S)-1-methyl-2-oxohexahydro-1H-a-
zepin-3-yl]amino}-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxoprop-
yl]hydroxyformamide was prepared according to General Procedure E,
utilizing (3S)-3-amino-1-methylhexahydro-2H-azepin-2-one in place
of isopropyl amine in Part A, and 2.0 M HCl in ether with DCM as a
solvent in Part B. LCMS: (M+H).sup.+: 500.1/502.2.
Example 194
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{(2R)-2-[(methyloxy)methyl]-1-pyrrolidinyl-
}-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformam-
ide
##STR00216##
[1005]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{(2R)-2-[(methyloxy)methyl]-1-pyrro-
lidinyl}-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure E, utilizing
commerically-available (S)-(+)-2-(methoxymethyl)pyrrolidine in
place of isopropyl amine in Part A, and 2.0 M HCl in ether with DCM
as a solvent in Part B. LCMS: (M+H).sup.+: 473.2/475.2.
Example 195
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (D1, Single Unknown Diastereomer)
##STR00217##
[1006] Part A
Methyl 3-methyl-3-[(phenyl methyl)amino]butanoate
[1007] To a solution of benzylamine (10.0 mL, 91.6 mmol) in 95%
MeOH water (180 mL) was added methyl 3-methyl-2-butenoate (12.3 mL,
100.8 mmol). The solution was heated at 55.degree. C. and stirred
for 2 weeks. The solution was then cooled to room temperature,
concentrated in vacuo, and the residue purified by gradient silica
gel chromatography (0% to 100% EtOAc in hexanes; 1% Et.sub.3N) to
provide methyl 3-methyl-3-[(phenylmethyl)amino]butanoate (5.5893 g,
28%) as a pale yellow oil. LCMS: (M+H).sup.+: 222.1.
Part B
Methyl
3-methyl-3-[[(methyloxy)(oxo)acetyl](phenylmethyl)amino]butanoate
[1008] To a solution of methyl
3-methyl-3-[(phenylmethyl)amino]butanoate (5.5853 g, 25.24 mmol) in
THF (125 mL) was added N,N-diisopropylethylamine (6.6 mL, 37.89
mmol). The solution was cooled to 0.degree. C., and methyl
chloro(oxo)acetate (2.55 mL, 27.73 mmol) was added dropwise. The
mixture was then allowed to stir and warm to room temperature
overnight. The mixture was diluted with EtOAc (200 mL) and washed
with 1 N aq. HCl (100 mL), followed by sat. aq. NaHCO.sub.3 (100
mL). The organic phase was dried over anhydrous MgSO.sub.4,
filtered, and concentrated in vacuo. The residue was crystallized
from EtOAc hexanes to give a white solid that was collected by
vacuum filtration and washed with hexanes. The resulting methyl
3-methyl-3-[[(methyloxy)(oxo)acetyl](phenylmethyl)amino]butanoate
(7.0709 g, 91%) was obtained as a white solid. LCMS: (M+H).sup.+:
308.1.
Part C
Methyl
2,2-dimethyl-4,5-dioxo-1-(phenylmethyl)-3-pyrrolidinecarboxylate
[1009] To a mixture of methyl
3-methyl-3-[[methyloxy)(oxo)acetyl](phenylmethyl)amino]butanoate
(6.9702 g, 22.68 mmol) in toluene (110 mL) was added 25% w/w NaOMe
in MeOH (14 mL). The mixture was heated at 80.degree. C. and
stirred for 2 h. The solution was then cooled to room temperature
and concentrated in vacuo to ca. 1/2 volume. The residue was
partitioned between DCM (200 mL) and 1 N aq. HCl (200 mL). The
aqueous phase was extracted with a fresh portion of DCM (100 mL),
and the combined organic phase was dried over anhydrous MgSO.sub.4,
filtered, and concentrated in vacuo. The resulting white solid was
triturated with hexanes and collected by vacuum filtration to
afford methyl
2,2-dimethyl-4,5-dioxo-1-(phenylmethyl)-3-pyrrolidinecarboxylate
(5.5965 g, 88%) as a white solid. LCMS: (M+H).sup.+: 276.1.
Part D
5,5-Dimethyl-1-(phenylmethyl)-2,3-pyrrolidinedione
[1010] A solution of methyl
2,2-dimethyl-4,5-dioxo-1-(phenylmethyl)-3-pyrrolidinecarboxylate
(5.6429 g, 20.50 mmol) in 10:1 HOAc water (100 mL) was heated at
100.degree. C. and stirred for 2 days. The solution was cooled to
room temperature and concentrated in vacuo. The residue was
partitioned between DCM (200 mL) and sat. aq. NaHCO.sub.3 (100 mL).
The aqueous phase was extracted with a fresh portion of DCM (50
mL), and the combined organic phase was dried over anhydrous
MgSO.sub.4, filtered, and concentrated in vacuo to give crude
5,5-dimethyl-1-(phenylmethyl)-2,3-pyrrolidinedione (3.9096 g, 88%
crude yield) as a light orange solid. LCMS: (M+H).sup.+: 218.1.
Part E
(3E)-5,5-Dimethyl-1-(phenylmethyl)-2,3-pyrrolidinedione
3-(O-methyloxime)
[1011] To a solution of
5,5-dimethyl-1-(phenylmethyl)-2,3-pyrrolidinedione (3.9036 g, 17.97
mmol) in MeOH (90 mL) was added sodium acetate (1.81 g, 21.54 mmol)
and methoxyamine hydrochloride (1.80 g, 21.55 mmol). The solution
was stirred overnight and the solvent was then removed in vacuo.
The residue was partitioned between DCM (200 mL), sat. aq.
NaHCO.sub.3, and water. The aqueous phase was extracted with a
fresh portion of DCM (50 mL), and the combined organic phase was
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo to provide crude
(3E)-5,5-dimethyl-1-(phenylmethyl)-2,3-pyrrolidinedione
3-(O-methyloxime) (4.5282 g, >100% crude yield) as a
yellow/orange oil. LCMS: (M+H).sup.+: 247.1.
Part F
5,5-Dimethyl-1-(phenylmethyl)-3-pyrrolidinamine
[1012] To a 0.degree. C. solution of
(3E)-5,5-dimethyl-1-(phenylmethyl)-2,3-pyrrolidinedione
3-(O-methyloxime) (4.2872 g, 17.41 mmol) in THF (90 mL) was added
LiAlH.sub.4 (2.64 g, 69.57 mmol) portionwise. The mixture was
heated at 70.degree. C. and stirred for 6.5 h. The mixture was then
cooled to room temperature and quenched by addition of
Na.sub.2SO.sub.4.10H.sub.2O (3 g), followed by 1 N aq. NaOH (100
mL). The mixture was extracted with Et.sub.2O (2.times.150 mL), and
the combined organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo. The residue
was diluted with DCM (200 mL), and the mixture was dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to
give crude racemic 5,5-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine
(3.2293 g, 86%) as a light yellow oil. LCMS: (M+H).sup.+:
205.2.
Part G
N,N,5,5-Tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine
[1013] A solution of racemic
5,5-dimethyl-1-(phenylmethyl)-3-pyrrolidinamine (3.2293 g, 15.81
mmol) in formic acid (20 mL) and formalin (20 mL) was heated at
100.degree. C. and stirred for 1 h. The solution was then cooled to
0.degree. C. and adjusted to pH 14 with 6 N aq. NaOH. The mixture
was extracted with Et.sub.2O (2.times.150 mL), and the combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo. The residue was diluted with DCM (200
mL), and the solution was dried over anhydrous Na.sub.2SO.sub.4,
filtered, and concentrated in vacuo. The residue was purified by
gradient silica gel chromatography (0% to 100% EtOAc in hexanes; 1%
Et.sub.3N) to give racemic
N,N,5,5-tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine (2.8158 g,
77%) as an orange oil. LCMS: (M+H).sup.+: 232.9. This material was
separated into its two constitutive enantiomers by preparative
chiral supercritical fluid chromatography (Chiralpak AD-H
20.times.250 mm; 6% MeOH (0.1% Et.sub.2NH), 94% CO.sub.2; 50
mL/min; 230 nm detection; 50 mg injection/cycle).
Part H
N,N,5,5-Tetramethyl-3-pyrrolidinamine dihydrochloride
[1014] To a solution of the first eluting enantiomer of
N,N,5,5-tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine (1.0607 g,
4.569 mmol) in MeOH (40 mL) was added 1 N aq. HCl (9.1 mL, 9.1
mmol) and 10% Pd/C (50% water, 265 mg). The mixture was
hydrogenated overnight and was then filtered through a 0.2 .mu.m
PTFE membrane. The solution was concentrated in vacuo, and the
residue was azeotroped with MeOH (5.times.50 mL) to give crude
N,N,5,5-tetramethyl-3-pyrrolidinamine dihydrochloride (1.0206 g,
>100% crude yield) as a white foam. LCMS: (M+H).sup.+:
143.1.
Part I
Tris(1,1-dimethylethyl)
2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[1015] To a solution of N,N,5,5-tetramethyl-3-pyrrolidinamine
dihydrochloride (assumed 0.9831 g, 4.569 mmol) in DMF (23 mL) was
added tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(2.27 g, 4.564 mmol) and N,N-diisopropylethylamine (2.63 mL, 15.10
mmol). The solution was stirred overnight and then diluted with
Et.sub.2O (100 mL). The mixture was washed with water (2.times.50
mL), and the combined aqueous phase was extracted with a fresh
portion of Et.sub.2O (50 mL). This organic phase was washed with a
fresh portion of water (20 mL), and the combined organic phase was
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo. The residue was purified by gradient silica gel
chromatography (0% to 100% EtOAc in hexanes; 1% Et.sub.3N) to give
tris(1,1-dimethylethyl)
2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate (2.2034 g, 80%) as a
light yellow foam. LCMS: (M+H).sup.+: 603.3.
Part J
1-(2-Chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,5,5-tetramethyl-3-pyrr-
olidinamine
[1016] To a solution of tris(1,1-dimethylethyl)
2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-fluoro-4--
pyrimidinyl}-1,1,2-hydrazinetricarboxylate (2.2004 g, 3.648 mmol)
in MeOH (22 mL) was added 4 N HCl in dioxane (22 mL). The solution
was stirred for 3 days and then concentrated in vacuo. The residue
was azeotroped with MeOH (50 mL), and then partitioned between DCM
(100 mL) and sat. aq. NaHCO.sub.3 (100 mL). The aqueous phase was
extracted with fresh DCM (2.times.50 mL), and the combined organic
phase was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo to give
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,5,5-tetramethyl-3-pyr-
rolidinamine (1.0552 g, 96%) as an orange foam. LCMS: (M+H).sup.+:
303.1.
Part K
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenyl methyl)oxy]formamide
[1017] To a solution of
1-(2-chloro-5-fluoro-6-hydrazino-4-pyrimidinyl)-N,N,5,5-tetramethyl-3-pyr-
rolidinamine (1.0502 g, 3.469 mmol) in DMF (16 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (1.0075 g, 3.299 mmol), N-methylmorpholine (1.8 mL, 16.37
mmol), 1-hydroxy-7-azabenzotriazole (0.540 g, 3.968 mmol), and EDC
(0.760 g, 3.964 mmol). The solution was stirred overnight and then
diluted with Et.sub.2O (100 mL). The mixture was washed with water
(3.times.50 mL), and the combined aqueous phase was extracted with
a fresh portion of Et.sub.2O (50 mL). This organic phase was washed
with a fresh portion of water (25 mL), and the combined organic
phase was dried over anhydrous Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo. The residue was dissolved in DCM (150 mL),
dried over anhydrous Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo to provide crude
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl][(phenylmethyl)oxy]formamide (1.6539 g, 85%
crude yield) as a dark red foam. LCMS: (M+H).sup.+: 590.2.
Part L
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[1018] To a solution of
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenyl-
methyl)oxy]formamide (1.6493 g, 2.795 mmol) in MeOH (28 mL) was
added 20% Pd(OH).sub.2/C (50% water, 165 mg). The mixture was
hydrogenated for 3.5 h, and then filtered. The solution was
concentrated in vacuo, and the residue was purified by Gilson RPLC
to provide
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5--
fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide (0.7580 g, 54%, single unknown diastereomer) as a pink
solid following crystallization from EtOAc hexanes. LCMS:
(M+H).sup.+: 500.3.
Example 196
[(2R)-3-(2-{2-Chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide (D2, Single Unknown Diastereomer)
##STR00218##
[1020] The second eluting enantiomer of
N,N,5,5-tetramethyl-1-(phenylmethyl)-3-pyrrolidinamine was employed
to prepare
[(2R)-3-(2-{2-chloro-6-[4-(dimethylamino)-2,2-dimethyl-1-pyrrolid-
inyl]-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
hydroxyformamide according to the procedures of Example 195. LCMS:
(M+H).sup.+: 500.3.
Example 197
[(2R)-3-[2-(2-Chloro-6-{3-[2-(dimethylamino)-1,1-dimethylethyl]-1-pyrrolid-
inyl}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]-
hydroxyformamide (Mixture of Diastereomers)
##STR00219##
[1021] Part A
{1-Methyl-1-[1-(phenylmethyl)-3-pyrrolidinyl]ethyl}amine
[1022] {1-Methyl-1-[1-(phenylmethyl)-3-pyrrolidinyl]ethyl}amine can
be prepared according to literature procedure (J. Org. Chem. 2000,
65, 1016-1021). LCMS: (M+H).sup.+: 219.1.
Part B
N,N-Dimethyl-2-[1-(phenylmethyl)-3-pyrrolidinyl]-2-propanamine
[1023] {1-Methyl-1-[1-(phenylmethyl)-3-pyrrolidinyl]ethyl}amine
(1.0726 mg, 4.912 mmol) was dissolved in a mixture of formaldehyde
(30 mL) and formic acid (30 mL), and then heated to 100.degree. C.
for 2 hours. After cooling to 0.degree. C., 6 N aq. NaOH was added
to adjust the pH to 14. The aqueous layer was then extracted with
Et.sub.2O (3.times.50 mL), and the combined organic phase was dried
over anhydrous MgSO.sub.4, filtered, and concentrated in vacuo to
provide
N,N-dimethyl-2-[1-(phenylmethyl)-3-pyrrolidinyl]-2-propanamine
(1.85 g, 99%). LCMS: (M+H).sup.+: 247.2.
Part C
N,N-Dimethyl-2-(3-pyrrolidinyl)-2-propanamine hydrochloride
[1024]
N,N-Dimethyl-2-[1-(phenylmethyl)-3-pyrrolidinyl]-2-propanamine
(2.089 g, 8.47 mmol) was dissolved in a mixture of MeOH (50 mL) and
1N HCl (18.65 mL, 18.65 mmol), degassed and placed under argon. 10%
Pd/C (625 mg) was added, and the contents were thoroughly degassed
and placed under a hydrogen balloon for 2 h. The contents were then
degassed, and the Pd/C was removed by filtration through a
fiberglass filter, washing with MeOH. The filtrate was concentrated
in vacuo to provide pure
N,N-dimethyl-2-(3-pyrrolidinyl)-2-propanamine hydrochloride (1.245
g, 76%). LCMS: (M+H).sup.+: 157.2.
Part D
[(2R)-3-[2-(2-Chloro-6-{3-[2-(dimethylamino)-1,1-dimethylethyl]-1-pyrrolid-
inyl}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]-
hydroxyformamide
[1025]
[(2R)-3-[2-(2-Chloro-6-{3-[2-(dimethylamino)-1,1-dimethylethyl]-1-p-
yrrolidinyl}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxo-
propyl]hydroxyformamide was prepared as a mixture of diastereomers
according to General Procedure E, utilizing
N,N-dimethyl-2-(3-pyrrolidinyl)-2-propanamine hydrochloride in
place of isopropyl amine in Part A. LCMS: (M+H).sup.+: 514.2.
Example 198
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,3R)-2,3,4-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
##STR00220##
[1026] Part A
Phenyl methyl 2,3-dimethyl-1-piperazinecarboxylate
[1027] A 100 mL, three-necked round-bottom flask was charged with a
mixture of trans-2,3-dimethylpiperazine and
cis-2,3-dimethylpiperazine (Yakugaku Zasshi, 1958, 78, 229-232)
(3.571 g, 31.1 mmol). The flask was cooled in an ice bath, and a
solution of methanesulfonic acid (3.95 mL, 60.9 mmol) in 2.7 mL of
water was added slowly, maintaining the temperature below
40.degree. C. The solution was cooled to 20.degree. C., and 4 mL of
ethanol was added. The pH was adjusted to 4 with 60% aqueous
potassium acetate, and then benzyl chloroformate (3.86 mL, 27.4 mol
in 2 mL of THF) and potassium acetate solutions were simultaneously
added dropwise with adjustment of the rate to maintain the reaction
solution at pH 4, with cooling to maintain the temperature at
25.degree. C. After the mixture was stirred an additional hour, the
organic solvents were removed, and the remaining aqueous solution
was washed with ethyl acetate. The ethyl acetate wash was extracted
with 1 M HCl twice to recover the desired product. The acid
extracts were combined with the original aqueous solution, and the
pH was adjusted to 11 by addition of 6 N NaOH, with cooling to
maintain the temperature below 40.degree. C. The aqueous solution
was then extracted with ethyl acetate, and the ethyl acetate
extraction was dried over magnesium sulfate. Filtration and removal
of the solvent provided all four stereoisomers of phenylmethyl
2,3-dimethyl-1-piperazinecarboxylate as a dark brown oil (3.11 g,
41%). LCMS: (M+H).sup.+: 249.1.
Part B
Phenyl methyl (2R,3R)-2,3,4-trimethyl-1-piperazinecarboxylate and
phenyl methyl (2S,3S)-2,3,4-trimethyl-1-piperazinecarboxylate
[1028] To a solution of phenylmethyl
2,3-dimethyl-1-piperazinecarboxylate (mixture of four
stereoisomers) (3.105 g, 12.5 mmol) in dichloromethane (90 mL) at
0.degree. C. was added formaldehyde (1.409 mL, 37% water solution,
18.75 mmol) followed by sodium triacetoxyborohydride (3.445 g,
16.26 mmol). The reaction mixture was allowed to warm to room
temperature and stirred for 2 h before being diluted with
dichloromethane and washed with 1N NaOH solution. The organics were
washed with brine, dried (MgSO.sub.4) and evaporated to yield
phenylmethyl 2,3,4-trimethyl-1-piperazinecarboxylate (mixture of
all four stereoisomers) (3.04 g, 93%). Phenylmethyl
(2R,3R)-2,3,4-trimethyl-1-piperazinecarboxylate (365 mg) and
phenylmethyl (2S,3S)-2,3,4-trimethyl-1-piperazinecarboxylate (420
mg) were separated out by a combination of preparative and chiral
chromatography. Absolute configuration was assigned using Ab Initio
vibrational circular dichroism. LCMS: (M+H).sup.+: 263.3.
Part C
(2R,3R)-1,2,3-Trimethylpiperazine, hydrochloride salt
[1029] Phenylmethyl (2R,3R)-2,3,4-trimethyl-1-piperazinecarboxylate
(328 mg, 1.25 mmol) was dissolved in 20 mL of MeOH, degassed and
placed under argon. 10% Pd/C (81 mg) was added, and the contents
were thoroughly degassed and placed under a hydrogen balloon for
approximately 3 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
After 2.75 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the hydrochloride salt of
(2R,3R)-1,2,3-trimethylpiperazine (251 mg, 100%). LCMS:
(M+H).sup.+: 129.1.
Part D
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,3R)-2,3,4-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
[1030]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,3R)-2,3,4-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure E,
utilizing (2R,3R)-1,2,3-trimethylpiperazine, hydrochloride salt in
place of isopropyl amine in Part A, and using 3 equivalents of
DIPEA. LCMS: (M+H).sup.+: 486.1.
Example 199
[(2R)-3-{2-[2-Chloro-6-(3-ethyl-3-hydroxy-1-azetidinyl)-5-fluoro-4-pyrimid-
inyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00221##
[1031] Part A
3-Ethyl-3-azetidinol hydrochloride
[1032] A mixture of 1-(diphenylmethyl)-3-ethyl-3-azetidinol (0.200
g, 0.75 mmol) (J. Med. Chem. 1993, 36, 801-810) and 20%
Pd(OH).sub.2 (200 mg) in ethanol (30 ml) and 1N HCl (5 ml) was
treated with H.sub.2 at 55 psi overnight. Standard work-up provided
3-ethyl-3-azetidinol hydrochloride. LCMS: (M+H).sup.+102.2.
Part B
[(2R)-3-{2-[2-Chloro-6-(3-ethyl-3-hydroxy-1-azetidinyl)-5-fluoro-4-pyrimid-
inyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1033]
[(2R)-3-{2-[2-Chloro-6-(3-ethyl-3-hydroxy-1-azetidinyl)-5-fluoro-4--
pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
3-ethyl-3-azetidinol hydrochloride in place of N-methylpiperazine
in Part A. LCMS: (M+H).sup.+459.1.
Example 200
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-1H-furo[3,4-c]pyrrol-5(3H)-yl)-
-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformami-
de
##STR00222##
[1035]
([(2R)-3-{2-[2-Chloro-5-fluoro-6-(tetrahydro-1H-furo[3,4-c]pyrrol-5-
(3H)-yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydrox-
yformamide was prepared according to General Procedure E, utilizing
hexahydro-1H-furo[3,4-c]pyrrole (Example 99) in place of isopropyl
amine in Part A. LCMS: (M+H).sup.+: 471.1/473.1.
Example 201
{(2R)-2-[(2-{2-Chloro-5-fluoro-6-[(9aR)-octahydro-2H-pyrido[1,2-a]pyrazin--
2-yl]-4-pyrimidinyl}hydrazino)carbonyl]hexyl}hydroxyformamide
##STR00223##
[1036] Part A
(2R)-2-({Formyl[(phenylmethyl)oxy]amino}methyl)hexanoic acid
[1037] (2R)-2-({Formyl[(phenylmethyl)oxy]amino}methyl)hexanoic acid
was prepared in a manner similar to Intermediate A, utilizing
hexanoyl chloride in place of 3-cyclopentylpropionyl chloride in
Part A. LCMS: (M+H).sup.+: 280.2.
Part B
{(2R)-2-[(2-{2-Chloro-5-fluoro-6-[(9aR)-octahydro-2H-pyrido[1,2-a]pyrazin--
2-yl]-4-pyrimidinyl}hydrazino)carbonyl]hexyl}hydroxyformamide
[1038]
{(2R)-2-[(2-{2-Chloro-5-fluoro-6-[(9aR)-octahydro-2H-pyrido[1,2-a]p-
yrazin-2-yl]-4-pyrimidinyl}hydrazino)carbonyl]hexyl}hydroxyformamide
was prepared according to General Procedure E, utilizing
(9aR)-octahydro-2H-pyrido[1,2-a]pyrazine (J. Med. Chem. 1993, 36,
2311-2320) in place of isopropyl amine in Part A, 2.0 M HCl in
ether with DCM as a solvent in Part B, and
(2R)-2-({formyl[(phenylmethyl)oxy]amino}methyl)hexanoic acid in
place of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in Part C. LCMS: (M+H).sup.+: 472.2/474.1.
Example 202
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2S,3S)-2,3,4-tri-
methyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00224##
[1039] Part A
(2S,3S)-1,2,3-Trimethylpiperazine, hydrochloride salt
[1040] Phenylmethyl (2S,3S)-2,3,4-trimethyl-1-piperazinecarboxylate
(323 mg, 1.23 mmol) (Example 198) was dissolved in 20 mL of MeOH,
degassed and placed under argon. 10% Pd/C (81 mg) was added, and
the contents were thoroughly degassed and placed under a hydrogen
balloon for approximately 3 hrs. The contents were then degassed
and filtered through Celite, and the Celite pad was washed with DCM
and MeOH. After 2.70 mL 1N HCl was added, the resulting filtrate
was concentrated in vacuo to provide the hydrochloride salt of
(2S,3S)-1,2,3-trimethylpiperazine (246 mg, 100%). LCMS:
(M+H).sup.+: 129.1.
Part B
N-[(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-2-methyl-6-[(2S,3S)-2,3,4-trimethyl-1-piperazinyl]-
-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyformamide
[1041]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2S,3S)-2,-
3,4-trimethyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure A,
utilizing (2S,3S)-1,2,3-trimethylpiperazine, hydrochloride salt in
place of pyrrolidine in Part A, and using 3 equivalents of DIPEA.
LCMS: (M+H).sup.+: 466.2.
Example 203
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2R,3R)-2,3,4-tri-
methyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00225##
[1043]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2R,3R)-2,-
3,4-trimethyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure A,
utilizing (2R,3R)-1,2,3-trimethylpiperazine, hydrochloride salt
(Example 198) in place of pyrrolidine in Part A, and using 3
equivalents of DIPEA. LCMS: (M+H).sup.+: 466.2.
Example 204
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidinyl}hyd-
razino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00226##
[1045] Tris(1,1-dimethylethyl) 2-{2-chloro-5-fluoro-6-[(3-thienyl
methyl)amino]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[1046] Tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(1.413 g, 2.85 mmol) was dissolved in THF (5 mL). To this solution
was added triethylamine (0.48 mL, 3.4438 mmol), followed by
commercially available (3-thienylmethyl)amine (0.322 g, 2.85 mmol)
which was dissolved in THF (1 mL). After stirring, the reaction
mixture was diluted with water, and the aqueous layer was extracted
with ethyl acetate. The organics were dried (Na.sub.2SO.sub.4) and
concentrated to produce tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidinyl}-1,1,2-hydr-
azinetricarboxylate as a white solid (1.6214 g, 99%). LCMS:
(M+H-3Boc).sup.+=374.1.
2-Chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4(1H)-pyrimidinone
hydrazone dihydrochloride
[1047] Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidinyl}-1,1,2-hydr-
azinetricarboxylate (1.6214 g, 2.83 mmol) was dissolved in MeOH (28
mL) and HCl (4M in 1,4-dioxane) (28 mL). The reaction mixture was
left to stir overnight and then evaporated to provide
2-chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4(1H)-pyrimidinone
hydrazone, presumed dihydrochloride, as a wine colored solid
(1.0828 g). LCMS: (M+H-2HCl).sup.+=273.9.
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3-thienyl
methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
(tetrahydro-2H-pyran-2-yloxy)formamide
[1048]
2-Chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4(1H)-pyrimidinone
hydrazone dihydrochloride (1.0828 g) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid diisopropyl amine salt form (1.63 g, 3.8 mmol) were
dissolved in DMF (9 mL). NMM (2.1 mL, 19.1 mmol) was added,
followed by HOAt (0.512 g, 3.76 mmol) and EDC (0.722 g, 3.77 mmol).
After stirring overnight, the reaction mixture was purified by
RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidinyl}hy-
drazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)fo-
rmamide as a reddish brown solid (0.7045 g). LCMS:
(M+H-THP).sup.+=471.1.
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidinyl}hyd-
razino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1049]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yl-
oxy)formamide (0.7045 g, 1.272 mmol) was dissolved in acetic acid
(8 mL) and water (2 mL). The reaction mixture was stirred
overnight. The volatiles were evaporated, and the resulting residue
was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(3-thienylmethyl)amino]-4-pyrimidinyl}hy-
drazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide as a
beige solid (0.2284 g, 38%). LCMS: (M+H).sup.+=471.0.
Example 205
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[methyl(1,3-thiazol-2-ylmethy-
l)amino]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformam-
ide
##STR00227##
[1050] Part A
N-Methyl-1-(1,3-thiazol-2-yl)methanamine
[1051] Commercially available 2-thiazole carboxaldehyde (3.61 g,
31.91 mmol) was dissolved in isopropanol (90 mL), and sieves (3.65
g) were added to reaction vessel. Then methylamine hydrochloride
(17.28 g, 256 mmol), sodium acetate (7.85 g, 96 mmol) and sodium
cyanoborohydride (3.07 g, 48.9 mmol) were added to the reaction
mixture. The mixture was placed under argon and stirred for 3 days.
The sieves were filtered away and rinsed with isopropanol. The
filtrate was evaporated, and the resulting residue was dissolved in
ethyl acetate. The organics were washed with saturated aqueous
NaHCO.sub.3 and brine. The combined aqueous layers were extracted
with 1 L of 10% MeOH in chloroform solvent mixture, and the
combined organics were dried (Na.sub.2SO.sub.4) and evaporated. The
crude product was purified by silica gel chromatography (0-5% MeOH
in dichloromethane) to produce
N-methyl-1-(1,3-thiazol-2-yl)methanamine as a yellow oil (0.930 g,
23%). LCMS: (M+H).sup.+=129.0.
Part B
6-Chloro-5-fluoro-N-methyl-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl)-4-pyr-
imidinamine
[1052] 4,6-Dichloro-5-fluoro-2-(methylthio)pyrimidine (see
Intermediate E) (0.3313 g, 1.563 mmol),
N-methyl-1-(1,3-thiazol-2-yl)methanamine (0.200 g, 1.5625 mmol),
and triethylamine (0.26 mL, 1.8654 mmol) were dissolved in THF (5
mL) and left to stir overnight. Then the reaction mixture was
diluted with water and the aqueous layer was extracted with ethyl
acetate. The organics were dried (Na.sub.2SO.sub.4) and
concentrated to produce
6-chloro-5-fluoro-N-methyl-2-(methylthio)-N-(1,3-thiazol-2-ylmeth-
yl)-4-pyrimidinamine as a yellow oil (0.4928 g). LCMS:
(M+H).sup.+=305.0.
Part C
5-Fluoro-6-hydrazino-N-methyl-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl)-4--
pyrimidinamine
[1053]
6-Chloro-5-fluoro-N-methyl-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl-
)-4-pyrimidinamine (0.4928 g, 1.621 mmol) was dissolved in 5 mL of
DMSO and hydrazine monohydrate (0.63 mL, 12.96 mmol). The reaction
vessel was pressure sealed and heated to 80.degree. C. for 2 hours.
The reaction mixture was purified by RP-HPLC to provide
5-fluoro-6-hydrazino-N-methyl-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl)-4-
-pyrimidinamine as a beige solid (0.2112 g, 43%). LCMS:
(M+H).sup.+=301.0.
Part D
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[methyl(1,3-thiazol-2-ylmethy-
l)amino]-2-(methylthio)-4-pyrimidinyl]hydrazine}-3-oxopropyl)(tetrahydro-2-
H-pyran-2-yloxy)formamide
[1054]
5-Fluoro-6-hydrazino-N-methyl-2-(methylthio)-N-(1,3-thiazol-2-ylmet-
hyl)-4-pyrimidinamine (0.2112 g, 0.704 mmol), and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.365 g, 0.846 mmol) were dissolved in DMF (5 mL).
NMM (0.31 mL, 2.8195 mmol) was added, followed by HOAt (0.115 g,
0.846 mmol) and EDC (0.162 g, 0.845 mmol). After stirring
overnight, the reaction mixture was purified by RP-HPLC to provide
((2R)-2-(cyclopentyl methyl)-3-{2-[5-fluoro-6-[methyl
(1,3-thiazol-2-ylmethyl)amino]-2-(methylthio)-4-pyrimidinyl]hydrazine}-3--
oxopropyl)(tetrahydro-2H-pyran-2-yloxy)formamide as a beige-orange
solid (0.2601 g, 63%). LCMS: (M+H).sup.+=582.2.
Part E
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[methyl(1,3-thiazol-2-ylmethy-
l)amino]-2-(methylthio)-4-pyrimidinyl]hydrazine}-3-oxopropyl)hydroxyformam-
ide
[1055]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[methyl(1,3-thiazol-2--
ylmethyl)amino]-2-(methylthio)-4-pyrimidinyl]hydrazine}-3-oxopropyl)(tetra-
hydro-2H-pyran-2-yloxy)formamide (0.2601 g, 0.448 mmol) was
dissolved in acetic acid (8 mL) and water (2 mL). This reaction
mixture was stirred for 3 days. The volatiles were evaporated, and
the resulting residue was purified by RP-HPLC to provide
((2R)-2-(cyclopentylmethyl)-3-{2-[5-fluoro-6-[methyl
(1,3-thiazol-2-ylmethyl)amino]-2-(methylthio)-4-pyrimidinyl]hydrazine}-3--
oxopropyl)hydroxyformamide as a beige solid (0.1396 g, 63%). LCMS:
(M+H).sup.+=498.1.
Example 206
[1056]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(methylthio)-6-[(1,3-t-
hiazol-2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyforma-
mide
##STR00228##
Part A
6-Chloro-5-fluoro-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl)-4-pyrimidinami-
ne
[1057] 4,6-Dichloro-5-fluoro-2-(methylthio)pyrimidine (see
Intermediate E) (0.422 g, 1.991 mmol), commercially available
(1,3-thiazol-2-ylmethyl)amine hydrochloride (0.300 g, 1.992 mmol)
and triethylamine (0.61 mL, 4.3765 mmol) were dissolved in THF (3
mL) and left to stir for 4 days. The reaction mixture was diluted
with water, and the aqueous layer was extracted with ethyl acetate.
The organics were dried (MgSO.sub.4) and concentrated to produce
6-chloro-5-fluoro-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl)-4-pyrimidinam-
ine as a yellow-orange solid (0.6773 g). LCMS:
(M+H).sup.+=291.0.
Part B
5-Fluoro-2-(methylthio)-6-[(1,3-thiazol-2-ylmethyl)amino]-4(1H)-pyrimidino-
ne hydrazone
[1058]
6-Chloro-5-fluoro-2-(methylthio)-N-(1,3-thiazol-2-ylmethyl)-4-pyrim-
idinamine (0.6773 g, 2.336 mmol) was dissolved in DMSO (7 mL) and
hydrazine monohydrate (0.91 mL, 18.72 mmol). The reaction vessel
was pressure sealed and heated to 80.degree. C. for 2 hours. The
reaction mixture was purified by RP-HPLC to provide
5-fluoro-2-(methylthio)-6-[(1,3-thiazol-2-ylmethyl)amino]-4(1H)-pyrimidin-
one hydrazone as an orange solid (0.1958 g, 29%). LCMS:
(M+H).sup.+=287.1.
Part C
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(methylthio)-6-[(1,3-thiazol--
2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyra-
n-2-yloxy)formamide
[1059]
5-Fluoro-2-(methylthio)-6-[(1,3-thiazol-2-ylmethyl)amino]-4(1H)-pyr-
imidinone hydrazone (0.1958 g, 0.685 mmol) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.355 g, 0.823 mmol) were dissolved in DMF (5 mL).
NMM (0.30 mL, 2.7286 mmol) was added, followed by HOAt (0.112 g,
0.824 mmol) and EDC (0.157 g, 0.819 mmol). After stirring
overnight, the reaction mixture was purified by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-(methylthio)-6-[(1,3-thiazol-
-2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro-2H-pyr-
an-2-yloxy)formamide as an orange solid (0.2197 g, 57%). LCMS:
(M+H).sup.+=568.2.
Part D
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(methylthio)-6-[(1,3-thiazol--
2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1060]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(methylthio)-6-[(1,3-t-
hiazol-2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl](tetrahydro--
2H-pyran-2-yloxy)formamide (0.2197 g, 0.387 mmol) was dissolved in
acetic acid (8 mL) and water (2 mL). This reaction mixture was left
to stir over 3 days. The volatiles were evaporated, and the
resulting residue was purified by RP-HPLC to provide
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-(methylthio)-6-[(1,3-thiazol-
-2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
as a beige solid (0.0878 g, 47%). LCMS: (M+H).sup.+=484.2.
Example 207
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00229##
[1061] Part A
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimidinyl}-1,-
1,2-hydrazinetricarboxylate
[1062] Tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(6.22 g, 12.54 mmol) was dissolved in THF (15 mL). To this solution
was added triethylamine (2.1 mL, 15.0667 mmol), followed by
commercially available (2-furanylmethyl)methylamine (1.394 g, 12.32
mmol) which was dissolved in THF (3 mL). The reaction was left to
stir overnight. Then the reaction mixture was diluted with water,
and the aqueous layer was extracted with ethyl acetate. The
organics were dried (Na.sub.2SO.sub.4) and concentrated to produce
tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimidinyl}-1,-
1,2-hydrazinetricarboxylate as a beige solid (7.1439 g). LCMS:
(M+H).sup.+=572.3.
Part B
2-Chloro-5-fluoro-N-(2-furanylmethyl)-6-hydrazino-N-methyl-4-pyrimidinamin-
e
[1063] Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimidinyl}-1,-
1,2-hydrazinetricarboxylate (7.1439 g, 12.51 mmol) was dissolved in
MeOH (65 mL) and HCl (4M in 1,4-dioxane) (65 mL). The reaction
mixture was left to stir 5 hours, evaporated and purified by
RP-HPLC to provide
2-chloro-5-fluoro-N-(2-furanylmethyl)-6-hydrazino-N-methyl-4-pyrimidinami-
ne as an orange solid (0.8561 g). LCMS: (M+H).sup.+=272.1.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-y-
loxy)formamide
[1064]
2-Chloro-5-fluoro-N-(2-furanylmethyl)-6-hydrazino-N-methyl-4-pyrimi-
dinamine (0.400 g) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.764 g, 1.770 mmol) were dissolved in DMF. NMM (0.65
mL, 5.912 mmol) was added, followed by HOAt (0.241 g, 1.772 mmol)
and EDC (0.3396 g, 1.771 mmol). After stirring overnight, the
reaction mixture was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2--
yloxy)formamide as an orange solid (0.6318 g). LCMS:
(M+H).sup.+=553.2.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1065] [(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2-furanyl
methyl)(methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-ox-
opropyl](tetrahydro-2H-pyran-2-yloxy)formamide (0.6318 g, 1.145
mmol) was dissolved in acetic acid (8 mL) and water (2 mL). This
reaction mixture was left to stir overnight. The volatiles were
evaporated, and the resulting residue was purified by RP-HPLC to
provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(2-furanylmethyl)(methyl)amino]-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
as a beige solid (0.3182 g, 59%). LCMS: (M+H).sup.+=469.2.
Example 208
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[4-(2-hydroxyethyl)-1-piperazinyl]-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00230##
[1066] Part A
Phenylmethyl
(2S)-2-methyl-4-{2-[(phenylmethyl)oxy]ethyl}-1-piperazinecarboxylate
[1067] A solution of phenylmethyl
(2S)-2-methyl-1-piperazinecarboxylate (commerically available) (1
g, 4.3 mmol) and benzyloxyacetaldehyde (0.9 mL, 6.4 mmol) in DCM
(50 mL) was stirred for 30 minutes, and then NaBH(OAc).sub.3 (1.36
g, 6.4 mmol) was added. The reaction was stirred overnight before
being quenched with 1 M NaOH. The phases were separated and the
aqueous layer was extracted with DCM. The combined organics were
washed with brine, dried over sodium sulfate and concentrated to a
crude residue, which was purified by silica gel chromatography
(5-95% EtOAc in hexane) yielding phenylmethyl
(2S)-2-methyl-4-{2-[(phenylmethyl)oxy]ethyl}-1-piperazinecarboxylate
(0.93 g, 58%). LCMS: (M+H).sup.+: 369.1
Part B
2-[(3S)-3-Methyl-1-piperazinyl]ethanol
[1068] To a degassed solution of phenylmethyl
(2S)-2-methyl-4-{2-[(phenylmethyl)oxy]ethyl}-1-piperazinecarboxylate
(0.93 g, 2.5 mmol) in MeOH (30 mL) was added Pd/C (200 mg). The
resulting suspension was stirred overnight underneath a balloon of
hydrogen, but LCMS showed only loss of the CBZ-- group. The
catalyst was removed by filtration and the solvent was removed
under reduced pressure. The remaining residue was dissolved in MeOH
and another 200 mg of Pd/C was added, as well as 5 drops of
concentrated HCl. This mixture was hydrogenated at 50 psi on a Parr
shaker for 96 hours, after which time the catalyst was removed by
filtration. Concentration of the filtrate under reduced pressure
yielded 2-[(3S)-3-methyl-1-piperazinyl]ethanol hydrochloride in
quantitative yield. LCMS: (M+H).sup.+: 145.1.
Part C
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[4-(2-hydroxyethyl)-1-piperazinyl]-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1069]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[4-(2-hydroxyethyl)-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e was prepared according to General Procedure E, utilizing
2-[(3S)-3-methyl-1-piperazinyl]ethanol hydrochloride in place of
isopropyl amine in Part A. LCMS: (M+H).sup.+: 502.2.
Example 209
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R)-4-(2-hydroxyethyl)-2-methyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyf-
ormamide
##STR00231##
[1071]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R)-4-(2-hydroxyethyl)-2-methyl-1-
-piperazinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]h-
ydroxyformamide was prepared according to General Procedure E,
utilizing 2-[(R)-3-methyl-1-piperazinyl]ethanol hydrochloride
(prepared according to Example 208, Parts A and B, using
phenylmethyl (2R)-2-methyl-1-piperazinecarboxylate in place of
phenylmethyl (2S)-2-methyl-1-piperazinecarboxylate) in place of
isopropyl amine in Part A. LCMS: (M+H).sup.+: 502.1
Example 210
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{(2S)-2-[1-(1-pyrrol-
idinyl)cyclopropyl]-1-pyrrolidinyl}-4-pyrimidinyl)hydrazino]-3-oxopropyl}h-
ydroxyformamide
##STR00232##
[1072] Part A
1-(Phenylmethyl)-L-proline hydrochloride
[1073] Ethyl 1-(phenylmethyl)-L-prolinate (13.20 g, 56.57 mmol) was
dissolved in a mixture of THF (40 mL), EtOH (40 mL) and H.sub.2O
(16 mL). To this solution was added solid sodium hydroxide (6.789
g, 169.73 mmol), and the mixture was stirred at room temperature
overnight. The solution was adjusted to pH 2 with 1N aq. HCl and
then extracted with CH.sub.2Cl.sub.2 (3.times.50 mL). The combined
organic layers were dried over Na.sub.2SO.sub.4, filtered, and
concentrated in vacuo, and the resulting crude product was
1-(phenylmethyl)-L-proline hydrochloride (0.8 g). The aqueous
layers were concentrated in vacuo, the residue was suspended in
MeOH, and the resulting solid precipitate was collected by
filtration and combined with the product from the organic extracts
to provide 1-(phenylmethyl)-L-proline hydrochloride (13.30 g, 97%).
LCMS: (M+H).sup.+: 206.1
Part B
(2S)-1-(Phenylmethyl)-2-(1-pyrrolidinylcarbonyl)pyrrolidine
[1074] 1-(Phenylmethyl)-L-proline hydrochloride (2.0 g, 8.247 mmol)
and HOBt (1.34 g, 9.928 mmol) were dissolved in CH.sub.2Cl.sub.2
(50 mL), and 4-methylmorpholine (3.63 mL, 33.09 mmol), pyrrolidine
(0.760 mL, 9.101 mmol), and EDCl (1.906 g, 9.928 mmol) were added.
The solution was stirred overnight, and was then washed with water
(50 mL). The aqueous layer was extracted with CH.sub.2Cl.sub.2
(3.times.50 mL), and the combined organic layers were dried over
anhydrous MgSO.sub.4 and concentrated in vacuo. This crude product
was purified by flash chromatography (Combiflash, 0-100% ethyl
acetate/hexanes, 1% triethylamine) to provide
(2S)-1-(phenylmethyl)-2-(1-pyrrolidinylcarbonyl)pyrrolidine (1.619
g, 76%). LCMS: (M+H).sup.+: 259.2
Part C
(2S)-1-(Phenyl
methyl)-2-[1-(1-pyrrolidinyl)cyclopropyl]pyrrolidine
[1075] To a stirred solution of THF (50 mL) cooled to -78.degree.
C. was added ethyl magnesium bromide (11.6 mL, 34.8 mmol) followed
by titanium(IV) isopropoxide (2.042 mL, 6.96 mmol) and then
(2S)-1-(phenylmethyl)-2-(1-pyrrolidinylcarbonyl)pyrrolidine (1.619
g, 6.96 mmol). The mixture was allowed to warm to room temperature
and stir for 2 h, and was then checked by LCMS. Greater than 40% of
the starting material remained, and so the mixture was stirred
overnight, and then checked by LCMS again. Greater than 20% of the
starting material remained, and therefore an additional portion of
ethyl magnesium bromide (5.8 mL, 17.4 mmol) was added, and the
mixture was allowed to stir for 2 h and was checked by LCMS again.
Greater than 5% of the starting material remained, and an
additional portion of ethyl magnesium bromide (2.32 mL, 6.96 mmol)
was added and the mixture was allowed to stir for 2 h. When the
reaction was complete as determined by LCMS, the reaction mixture
was diluted with sat. aq. NH.sub.4Cl (150 mL) and water (50 mL),
and the resulting white solid precipitate was filtered off. The pH
of the filtrate was adjusted to >12 with 6 N aq. NaOH. The
aqueous solution was extracted with Et.sub.2O (3.times.100 mL), and
the combined organic layers were dried over MgSO.sub.4 and
concentrated in vacuo. This crude product was purified by flash
chromatography (Combiflash, 0-100% ethyl acetate/hexanes, 1%
triethylamine) to provide
(2S)-1-(phenylmethyl)-2-[1-(1-pyrrolidinyl)cyclopropyl]pyrrolidine
(1.0837 g, 57%). LCMS: (M+H).sup.+: 271.2.
Part D
1-{1-[(2S)-2-Pyrrolidinyl]cyclopropyl}pyrrolidine hydrochloride
[1076]
(2S)-1-(Phenylmethyl)-2-[1-(1-pyrrolidinyl)cyclopropyl]pyrrolidine
(1.083 g, 4.00 mmol) was dissolved in a mixture of MeOH (30 mL) and
1N HCl (8.8 mL), degassed and placed under argon. 10% Pd/C (325 mg)
was added, and the contents were thoroughly degassed and placed
under a hydrogen balloon for 2 h. The contents were then degassed,
and the Pd/C was removed by filtration through a fiberglass filter,
washing with MeOH. The filtrate was concentrated in vacuo to
provide pure 1-{1-[(2S)-2-pyrrolidinyl]cyclopropyl}pyrrolidine
hydrochloride (0.978 g, >99%). LCMS: (M+H).sup.+: 181.2.
Part E
5-Fluoro-4-hydrazino-2-methyl-6-{(2S)-2-[1-(1-pyrrolidinyl)cyclopropyl]-1--
pyrrolidinyl}pyrimidine
[1077] 4,6-Dichloro-5-fluoro-2-methylpyrimidine (428 mg, 2.368
mmol) was dissolved in 3 mL of MeOH, and then
1-{1-[(2S)-2-pyrrolidinyl]cyclopropyl}pyrrolidine hydrochloride
(489 mg, 2.256 mmol) was added, followed by DIPEA (1.572 mL, 9.024
mmol). The resulting reaction mixture was microwaved at 120.degree.
C. for 30 min, the volatiles were concentrated in vacuo, and the
residue was dissolved in a mixture of DMSO (4 mL) and MeOH (1 mL).
Hydrazine monohydrate was added (2.44 mL), and the contents were
heated to 60.degree. C. overnight. The reaction mixture was then
cooled to room temperature and purified by RP-HPLC to provide
5-fluoro-4-hydrazino-2-methyl-6-{(2S)-2-[1-(1-pyrrolidinyl)cyclopropyl]-1-
-pyrrolidinyl}pyrimidine (69 mg, 10%). LCMS: (M+H).sup.+:
321.2.
Part F
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{(2S)-2-[1-(1-pyrrol-
idinyl)cyclopropyl]-1-pyrrolidinyl}-4-pyrimidinyl)hydrazino]-3-oxopropyl}h-
ydroxyformamide
[1078]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(5-fluoro-2-methyl-6-{(2S)-2-[1-(1-
-pyrrolidinyl)cyclopropyl]-1-pyrrolidinyl}-4-pyrimidinyl)hydrazino]-3-oxop-
ropyl}hydroxyformamide was prepared according to General Procedure
A, Parts B and C, utilizing
5-fluoro-4-hydrazino-2-methyl-6-{(2S)-2-[1-(1-pyrrolidinyl)cyclopropyl]-1-
-pyrrolidinyl}pyrimidine in place of
5-fluoro-4-hydrazino-2-methyl-6-(1-pyrrolidinyl)pyrimidine in Part
B. LCMS: (M+H).sup.+: 518.4.
Example 211
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-3-ethyl-1-azetidinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00233##
[1079] Part A
1-(Diphenylmethyl)-3-ethyl-N,N-dimethyl-3-azetidinamine
[1080] A mixture of 1-(diphenylmethyl)-3-ethyl-3-azetidinyl
methanesulfonate (1.00 g, 2.89 mmol) (Ellsworth, Edmund Lee; Hoyer,
Denton Wade; Hutchings, Kim Marie; Kendall, Jackie Diane; Murphy,
Sean Timothy; Starr, Jeremy Tyson; Tran, Tuan Phong. WO
2005049605), dimethylamine (2 M in THF, 14.45 ml, 28.9 mmol) and
TEA (0.80 ml, 5.78 mmol) in isopropanol was heated to 70.degree. C.
overnight. Standard work-up followed by RP-HPLC provided
1-(diphenylmethyl)-3-ethyl-N,N-dimethyl-3-azetidinamine (0.215 g,
25.3%). LCMS: (M+H).sup.+295.2.
Part B
3-Ethyl-N,N-dimethyl-3-azetidinamine dihydrochloride
[1081] 1-(Diphenylmethyl)-3-ethyl-N,N-dimethyl-3-azetidinamine
(0.215 g, 0.73 mmol) in 1 N HCl (5 ml) and ethanol (30 ml) was
treated with H.sub.2 at 60 psi in the presence of Pd(OH).sub.2 on
carbon (100 mg). Standard work-up afforded
3-ethyl-N,N-dimethyl-3-azetidinamine dihydrochloride (0.165 g,
112.2%). LCMS: (M+H).sup.+129.1.
Part C
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-3-ethyl-1-azetidinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1082]
[(2R)-3-(2-{2-Chloro-6-[3-(dimethylamino)-3-ethyl-1-azetidinyl]-5-f-
luoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide was prepared according to Example 176, utilizing
3-ethyl-N,N-dimethyl-3-azetidinamine dihydrochloride in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part C.
LCMS: (M+H).sup.+486.2.
Example 212
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-(dimethylamino)-3-ethyl-1-azetidiny-
l]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfor-
mamide
##STR00234##
[1084]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-(dimethylamino)-3-ethyl-1-az-
etidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hyd-
roxyformamide was prepared according to General Procedure C,
utilizing 3-ethyl-N,N-dimethyl-3-azetidinamine hydrochloride
(Example 211) in place of azetidine hydrochloride in Part A. LCMS:
(M+H).sup.+498.3.
Example 213
[(2R)-3-{2-[2-Chloro-6-(3-cyclopropyl-3-hydroxy-1-azetidinyl)-5-fluoro-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00235##
[1086]
[(2R)-3-{2-[2-Chloro-6-(3-cyclopropyl-3-hydroxy-1-azetidinyl)-5-flu-
oro-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide was prepared according to General Procedure D, utilizing
3-cyclopropyl-3-azetidinol hydrochloride (Ellsworth, Edmund Lee;
Hutchings, Kim Marie; Murphy, Sean Timothy; Powell, Sharon Anne;
Sciotti, Richard John; Tran, Tuan Phong. WO 2005026146) in place of
N-methylpiperazine in Part A. LCMS: (M+H).sup.+471.0.
Example 214
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,5R)-2,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00236##
[1087] Part A
(2R,5R)-1,2,5-Trimethyl-4-(phenylmethyl)piperazine
[1088] To a solution of
(2R,5R)-2,5-dimethyl-1-(phenylmethyl)piperazine (prepared according
to J. Med. Chem. 2006, 49, 716-726, utilizing N-Boc-D-alanine in
place of N-Boc-L-alanine) (667 mg, 3.26 mmol) in dichloromethane
(25 mL) at 0.degree. C. was added formaldehyde (0.367 mL, 37% water
solution, 4.89 mmol) followed by sodium triacetoxyborohydride (900
mg, 4.24 mmol). The reaction mixture was allowed to warm to room
temperature and stirred for 2 h before being diluted with
dichloromethane and washed with 1N NaOH solution. The organics were
washed with brine, dried (MgSO.sub.4) and evaporated to yield
(2R,5R)-1,2,5-trimethyl-4-(phenylmethyl)piperazine (680 mg, 96%).
LCMS: (M+H).sup.+: 219.1.
Part B
(2R,5R)-1,2,3-Trimethylpiperazine, hydrochloride salt
[1089] (2R,5R)-1,2,5-Trimethyl-4-(phenylmethyl)piperazine (680 mg,
3.11 mmol) was dissolved in 50 mL of MeOH, degassed and placed
under argon. 10% Pd/C (170 mg) was added, and the contents were
thoroughly degassed and placed under a hydrogen balloon for
approximately 3 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
After 6.5 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the hydrochloride salt of
(2R,5R)-1,2,5-trimethylpiperazine (251 mg, 100%). LCMS:
(M+H).sup.+: 129.1.
Part C
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,5R)-2,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
[1090]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R,5R)-2,4,5-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure G,
utilizing (2R,5R)-1,2,5-trimethylpiperazine, hydrochloride salt in
place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 215
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2R,5R)-2,4,5-tri-
methyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00237##
[1092]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2R,5R)-2,-
4,5-trimethyl-1-piperazinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure A,
utilizing (2R,5R)-1,2,5-trimethylpiperazine, hydrochloride salt
(Example 214) in place of pyrrolidine in Part A, and using 3
equivalents of DIPEA. LCMS: (M+H).sup.+: 466.4.
Example 216
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(fluoromethyl)-6-[(9aS)-hexah-
ydropyrazino[2,1-c][1,4]oxazin-8(1H)-yl]-4-pyrimidinyl}hydrazino)-3-oxopro-
pyl]hydroxyformamide
##STR00238##
[1094]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-(fluoromethyl)-6-[(9aS-
)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-yl]-4-pyrimidinyl}hydrazino)-3-
-oxopropyl]hydroxyformamide was prepared according to General
Procedure A, utilizing (9aS)-octahydropyrazino[2,1-c][1,4]oxazine
dihydrochloride (Example 22) in place of pyrrolidine, using
4,6-dichloro-5-fluoro-2-(fluoromethyl)pyrimidine in place of
4,6-dichloro-5-fluoro-2-methylpyrimidine, and using 3 equivalents
of DIPEA in Part A. LCMS: (M+H).sup.+: 498.3.
Example 217
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(3-cyclopropyl-3-hydroxy-1-azetidinyl)-
-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyforma-
mide
##STR00239##
[1096]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-(3-cyclopropyl-3-hydroxy-1-azet-
idinyl)-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydro-
xyformamide was prepared according to General Procedure C,
utilizing 3-cyclopropyl-3-azetidinol hydrochloride (Ellsworth,
Edmund Lee; Hutchings, Kim Marie; Murphy, Sean Timothy; Powell,
Sharon Anne; Sciotti, Richard John; Tran, Tuan Phong. WO
2005026146) in place of azetidine hydrochloride in Part A. LCMS:
(M+H).sup.+483.1.
Example 218
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-ethyl-3-(1-pyrrolidinyl)-1-azetidin-
yl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfo-
rmamide
##STR00240##
[1097] Part A
1-(3-Ethyl-3-azetidinyl)pyrrolidine dihydrochloride
[1098] 1-(3-Ethyl-3-azetidinyl)pyrrolidine dihydrochloride was
prepared according to the procedure described for the preparation
of 3-ethyl-N,N-dimethyl-3-azetidinamine dihydrochloride (Example
211), utilizing pyrrolidine in place of dimethylamine in Part A.
LCMS: (M+H).sup.+155.1.
Part B
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-ethyl-3-(1-pyrrolidinyl)-1-azetidin-
yl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyfo-
rmamide
[1099]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-[3-ethyl-3-(1-pyrrolidinyl)-1-a-
zetidinyl]-5-fluoro-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hy-
droxyformamide was prepared according to General Procedure C,
utilizing 1-(3-ethyl-3-azetidinyl)pyrrolidine dihydrochloride in
place of azetidine hydrochloride in Part A. LCMS:
(M+H).sup.+524.3.
Example 219
[(2R)-3-(2-{2-Chloro-6-[(cyclopropylmethyl)amino]-5-fluoro-4-pyrimidinyl}h-
ydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00241##
[1101]
[(2R)-3-(2-{2-Chloro-6-[(cyclopropylmethyl)amino]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared in a manner similar to Example 176, utilizing
1-cyclopropylmethanamine in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part C.
LCMS: (M+H).sup.+429.1.
Example 220
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl)-
hydrazino]-2-(cyclopentyl methyl)-3-oxopropyl]hydroxyformamide
##STR00242##
[1102] Part A
2-(3-Thienyl)acetamide
[1103] Commercially available 3-thiophene acetic acid (2.0 g, 14.07
mmol) was dissolved in DCM (45 mL) under nitrogen. Then oxalyl
chloride (1.35 mL, 15.48 mmol) was added and the reaction was
stirred overnight. Then ammonium hydroxide (30% as NH.sub.3
solution) (8.22 mL) was added dropwise with stirring. The reaction
mixture was evaporated to provide 2-(3-thienyl)acetamide as a beige
solid (3.2082 g). LCMS: (M+H).sup.+=142.1.
Part B
[2-(3-Thienyl)ethyl]amine
[1104] Lithium aluminum hydride was placed in THF (10 mL) at
0.degree. C. in an ice bath under argon. Then
2-(3-thienyl)acetamide (0.9828 g, 6.97 mmol) was added as a
suspension in THF (30 mL). The reaction mixture was heated at
65.degree. C. overnight, then cooled to ambient temperature and
placed in an ice bath. The reaction was quenched with water (10
mL), 3N NaOH (10 mL), and additional water (10 mL). The mixture was
filtered over Celite, and the filtrate was washed with saturated
NaCl solution, dried (MgSO.sub.4) and evaporated to provide
[2-(3-thienyl)ethyl]amine as a yellow oil (0.470 g, 53%). LCMS:
(M+H).sup.+=128.1.
Part C
Tris(1,1-dimethylethyl)
2-(2-chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl)-1,1,2-h-
ydrazinetricarboxylate
[1105] Tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(1.84 g, 3.71 mmol) was dissolved in THF (5 mL). To this solution
was added triethylamine (0.62 mL, 4.4482 mmol), followed by
[2-(3-thienyl)ethyl]amine (0.470 g, 3.70 mmol) which was
semi-suspended in THF (15 mL). The reaction was left to stir
overnight, then diluted with water and saturated NaCl. The aqueous
layer was extracted with ethyl acetate. The organics were dried
(MgSO.sub.4) and concentrated to produce tris(1,1-dimethylethyl)
2-(2-chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl)-1,1,2-h-
ydrazinetricarboxylate as an orange oil (2.389 g). LCMS:
(M+H).sup.+=588.3.
Part D
2-Chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4(1H)-pyrimidinone
hydrazone
[1106] Tris(1,1-dimethylethyl)
2-(2-chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl)-1,1,2-h-
ydrazinetricarboxylate (2.389 g, 4.07 mmol) was dissolved in MeOH
(25 mL) and HCl (4M in 1,4-dioxane) (25 mL) at room temperature.
The reaction mixture was left to stir over 3 days, evaporated and
purified by RP-HPLC to provide
2-chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4(1H)-pyrimidinone
hydrazone as a brown sticky solid (0.1401 g). LCMS:
(M+H).sup.+=288.0.
Part E
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl)-
hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)-
formamide
[1107]
2-Chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4(1H)-pyrimidinone
hydrazone as a brown sticky solid (0.1401 g) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.253 g, 0.586 mmol) were dissolved in DMF (7 mL).
NMM (0.27 mL, 2.90 mmol) was added, followed by HOAt (0.080 g,
0.588 mmol) and EDC (0.112 g, 0.584 mmol). After stirring
overnight, the reaction mixture was purified by RP-HPLC to provide
[(2R)-3-[2-(2-chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl-
)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy-
)formamide as an orange solid (0.1677 g). LCMS:
(M+H).sup.+=569.3.
Part F
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl)-
hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1108]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrim-
idinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-
-yloxy)formamide (0.1677, 0.295 mmol) was dissolved in acetic acid
(8 mL) and water (2 mL). This reaction mixture was left to stir
overnight. The volatiles were evaporated, and the resulting residue
was purified by RP-HPLC to provide
[(2R)-3-[2-(2-chloro-5-fluoro-6-{[2-(3-thienyl)ethyl]amino}-4-pyrimidinyl-
)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide as a
beige solid (0.0715 g, 50%). LCMS: (M+H).sup.+=485.1.
Example 221
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyloctahydro-1(2H)-quinoxalinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00243##
[1109] Part A
(4aR,8aS)-Octahydro-2,3-quinoxalinedione
[1110] To a solution of cis-1,2-diaminocyclohexane (4.8 g, 42 mmol)
in dimethoxy ethylene (100 mL) was added slowly diethyl oxalate
(28.5 mL, 210 mmol). The reaction mixture was stirred at room
temperature for 0.5 h and at 100.degree. C. for 2 h. After the
suspension was cooled down to room temperature, the resulting white
solid precipitate was collected by filtration. The precipitate was
washed with diethyl ether and dried to yield
(4aR,8aS)-octahydro-2,3-quinoxalinedione (4.6 g, 66%). LCMS:
(M+H).sup.+: 169.1.
Part B
(4aR,8aS)-Decahydroquinoxaline
[1111] (4aR,8aS)-Octahydro-2,3-quinoxalinedione (4.67 g, 27.8 mmol)
was added portion wise to 1M LAH (111 mL, 111 mmol) in diethyl
ether (30 mL). The reaction was allowed to heated to reflux and
stirred at reflux for 4 h. After cooling to room temperature, the
reaction was quenched by the sequential addition of H.sub.2O (4.2
mL), 15% NaOH (4.2 mL), and H.sub.2O (12.6 mL). The mixture was
stirred for 0.5 h, and the solids were filtered off and washed with
excess EtOAc. The combined filtrates were concentrated under
reduced pressure to provide (4aR,8aS)-decahydroquinoxaline as a
white solid (3.6 g, 92%). LCMS: (M+H).sup.+: 141.1.
Part C
Phenylmethyl octahydro-1(2H)-quinoxalinecarboxylate (Enantiomeric
Mixture, cis)
[1112] To (4aR,8aS)-decahydroquinoxaline (1.4 g, 10 mmol) in
dichloromethane (50 mL) was added triethylamine (1.7 mL, 12 mmol)
followed by dropwise benzyl chloroformate (1.71 g, 10 mmol). The
reaction mixture was stirred at room temperature for 2 h before
being diluted with dichloromethane and washed with 1N NaOH followed
by sat. aq. NH.sub.4Cl. The combined organic layers were washed
with brine, dried (MgSO.sub.4) and concentrated to provide the
crude product, which was purified via Combiflash to yield
phenylmethyl octahydro-1(2H)-quinoxalinecarboxylate (enantiomeric
mixture, cis) (2.32 g, 85%). LCMS: (M+H).sup.+: 275.1.
Part D
Phenylmethyl
(4aS,8aR)-4-methyloctahydro-1(2H)-quinoxalinecarboxylate, Phenyl
methyl (4aR,8aS)-4-methyloctahydro-1(2H)-quinoxalinecarboxylate
[1113] To a solution of phenylmethyl
octahydro-1(2H)-quinoxalinecarboxylate (enantiomeric mixture) (2.32
g, 8.5 mmol) in dichloromethane (80 mL) at 0.degree. C. was added
formaldehyde (0.76 mL, 37% water solution, 10.2 mmol) followed by
sodium triacetoxyborohydride (2.7 g, 12.75 mmol). The reaction
mixture was allowed to warm to room temperature and stirred for 1 h
before being diluted with dichloromethane and washed with 1N NaOH
solution. The organics were washed with brine, dried
(Na.sub.2SO.sub.4) and evaporated to yield 2.3 g of phenylmethyl
4-methyloctahydro-1(2H)-quinoxalinecarboxylate (enantiomeric
mixture, cis) (2.3 g), which was separated by chiral LC to afford
phenylmethyl
(4aS,8aR)-4-methyloctahydro-1(2H)-quinoxalinecarboxylate, and
phenylmethyl
(4aR,8aS)-4-methyloctahydro-1(2H)-quinoxalinecarboxylate. Absolute
configuration was assigned using Ab Initio vibrational circular
dichroism. LCMS: (M+H).sup.+: 289.2.
Part E
(4aR,8aS)-1-Methyldecahydroquinoxaline, hydrochloride salt
[1114] Phenylmethyl
(4aS,8aR)-4-methyloctahydro-1(2H)-quinoxalinecarboxylate (2.7 g,
9.4 mmol) was dissolved in 140 mL of MeOH, degassed and placed
under argon. 10% Pd/C (400 mg) was added, and the contents were
thoroughly degassed and placed under a hydrogen balloon for
approximately 2 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
After 19.6 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the hydrochloride salt of
(4aR,8aS)-1-methyldecahydroquinoxaline (2.1 g, 100%). LCMS:
(M+H).sup.+: 155.1.
Part F
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyloctahydro-1(2H)-quinoxalinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1115]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyloctahydro-1(2H)-quinoxalin-
yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide was prepared according to General Procedure G, utilizing
(4aR,8aS)-1-methyldecahydroquinoxaline, hydrochloride salt in place
of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide
in Part A. LCMS: (M+H).sup.+: 512.3.
Example 222
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyloctahydro-1-
(2H)-quinoxalinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00244##
[1117]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methylocta-
hydro-1(2H)-quinoxalinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyform-
amide was prepared according to General Procedure A, utilizing
(4aR,8aS)-1-methyldecahydroquinoxaline (preparation see Example
221) in place of pyrrolidine in Part A, and using 3 equivalents of
DIPEA. LCMS: (M+H).sup.+: 492.3.
Example 223
N-[(2R)-3-[2-(6-{[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino}-2-chloro-
-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]-N-hy-
droxyformamide
##STR00245##
[1118] Part A
4-[(Methylamino)methyl]-1,3-thiazol-2-amine
[1119] 4-(Chloromethyl)-1,3-thiazol-2-amine (490 mg, 2.65 mmol) was
stirred in 40% aqueous methylamine (25 ml) overnight. The reaction
mixture was evaporated. The residue was then purified via reverse
phase HPLC to provide 4-[(methylamino)methyl]-1,3-thiazol-2-amine
(55 mg, 15%). LCMS: (M+H).sup.+: 144.0.
Part B
Tris(1,1-dimethylethyl)
2-{6-[[(2-amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-fluoro--
4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[1120] 4-[(Methylamino)methyl]-1,3-thiazol-2-amine (55 mg, 0.38
mmol) was dissolved in THF (3 mL). Triethylamine (0.06 mL, 0.42
mmol) was added, followed immediately by tris (1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(180 mg, 0.38 mmol). The reaction mixture was stirred overnight,
was diluted with EtOAc, was dried (sodium sulfate) and was
evaporated to provide tris(1,1-dimethylethyl)
2-{6-[[(2-amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-fluoro--
4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (230 mg, 100%). LCMS:
(M+H).sup.+: 604.2.
Part C
6-[[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-fluoro-4(1H-
)-pyrimidinone hydrazone trihydrochloride
[1121] Tris(1,1-dimethylethyl)
2-{6-[[(2-amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-fluoro--
4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (220 mg, 0.36 mmol)
was dissolved in 10 mL of methanol and stirred. To this solution, 5
mL of 4M HCl in dioxane was slowly added. The mixture was stirred
for 3 days and was evaporated to provide
6-[[(2-amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-fluoro-4(1-
H)-pyrimidinone hydrazone trihydrochloride (150 mg, 83%). LCMS:
(M+H).sup.+: 303.9.
Part D
[(2R)-3-(2-{6-[[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-
-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrah-
ydro-2H-pyran-2-yloxy)formamide
[1122]
6-[[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro-5-fluo-
ro-4(1H)-pyrimidinone hydrazone trihydrochloride (150 mg, 0.29
mmol),
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (120 mg, 0.4 mmol), and HOAt (59 mg, 0.43 mmol) were
dissolved in 10 mL of DMF. NMM (0.2 mL, 1.8 mmol) was added,
followed by EDC (85 mg, 0.43 mmol). After stirring overnight at
room temperature, the reaction mixture was purified by RP-HPLC
[(2R)-3-(2-{6-[[(2-amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-chloro--
5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetra-
hydro-2H-pyran-2-yloxy)formamide (110 mg, 52%). LCMS: (M+H).sup.+:
585.2.
Part E
N-[(2R)-3-[2-(6-{[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino}-2-chloro-
-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
[1123]
[(2R)-3-(2-{6-[[(2-Amino-1,3-thiazol-4-yl)methyl](methyl)amino]-2-c-
hloro-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yloxy)formamide (110 mg,
0.19 mmol) in 4:1 AcOH:water (5 mL) was stirred at room temperature
for 2 days. The solvents were removed in vacuo, and the resulting
crude product was purified by RP-HPLC to provide
N-[(2R)-3-[2-(6-{[(2-amino-1,3-thiazol-4-yl)methyl](methyl)amino}-2-chlor-
o-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]-N-h-
ydroxyformamide (20 mg, 21%). LCMS: (M+H).sup.+: 501.1.
Example 224
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(1-pyrrolidinylmethyl)-1-pyrrolidi-
nyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfor-
mamide
##STR00246##
[1125]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(1-pyrrolidinylmethyl)-1-py-
rrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide was prepared according to General Procedure E,
utilizing commercially-available
1-[(2S)-2-pyrrolidinylmethyl]pyrrolidine in place of isopropyl
amine in Part A. LCMS: (M+H).sup.+: 512.3
Example 225
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(phenylamino)-4-pyri-
midinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00247##
[1127]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(phenylamino)-
-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide was prepared
according to General Procedure A, utilizing aniline in place of
pyrrolidine in Part A. LCMS: (M+H).sup.+: 451.2.
Example 226
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyloctahydro-1(2H)-quinoxalinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00248##
[1128] Part A
(4aS,8aR)-1-Methyldecahydroquinoxaline, hydrochloride salt
[1129] Phenylmethyl
(4aR,8aS)-4-methyloctahydro-1(2H)-quinoxalinecarboxylate (Example
221) (2.58 g, 9.0 mmol) was dissolved in 120 mL of MeOH, degassed
and placed under argon. 10% Pd/C (380 mg) was added, and the
contents were thoroughly degassed and placed under a hydrogen
balloon for approximately 2 hrs. The contents were then degassed
and filtered through Celite, and the Celite pad was washed with DCM
and MeOH. After 19.0 mL 1N HCl was added, the resulting filtrate
was concentrated in vacuo to provide the hydrochloride salt of
(4aS,8aR)-1-methyldecahydroquinoxaline (2.0 g, 100%). LCMS:
(M+H).sup.+: 155.1.
Part B
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyloctahydro-1(2H)-quinoxalinyl)-4-p-
yrimidinyl]hydrazino}-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[1130]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(4-methyloctahydro-1(2H)-quinoxalin-
yl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide was prepared according to General Procedure G, utilizing
(4aS,8aR)-1-methyldecahydroquinoxaline, hydrochloride salt in place
of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane, dihydrobromide
in Part A. LCMS: (M+H).sup.+: 512.3.
Example 227
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyloctahydro-1-
(2H)-quinoxalinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00249##
[1132]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methylocta-
hydro-1(2H)-quinoxalinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyform-
amide was prepared according to General Procedure A, utilizing
(4aS,8aR)-1-methyldecahydroquinoxaline, hydrochloride salt (Example
226) in place of pyrrolidine in Part A, and using 3 equivalents of
DIPEA. LCMS: (M+H).sup.+: 492.3.
Example 228
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,3R)-2,3,4-trimethyl-1-piperazinyl]-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00250##
[1134]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,3R)-2,3,4-trimethyl-1-piperazi-
nyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfor-
mamide was prepared according to General Procedure E, utilizing
(2R,3S)-1,2,3-trimethylpiperazine dihydrochloride (Example 175) in
place of isopropyl amine in Part A, 2.0 M HCl in ether with DCM as
a solvent in Part B, and
(2R)-2-({formyl[(phenylmethyl)oxy]amino}methyl)hexanoic acid
(Example 201) in place of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in Part C. LCMS: (M+H).sup.+: 460.2/462.1.
Example 229
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R)-2-(4-morpholinyl
methyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
##STR00251##
[1136]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R)-2-(4-morpholinylmethyl)-1-pyr-
rolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide was prepared according to
General Procedure E, utilizing
(S)-2-(morpholin-4-ylmethyl)-pyrrolidine (Bull. Chem. Soc. 1990,
63, 721-727) in place of isopropyl amine in Part A, and 2.0 M HCl
in ether with DCM as a solvent in Part B. LCMS: (M+H).sup.+:
528.2/530.2.
Example 230
[(2R)-3-[2-(2-Chloro-6-{3-ethyl-3-[ethyl(methyl)amino]-1-azetidinyl}-5-flu-
oro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide
##STR00252##
[1137] Part A
N,3-Diethyl-N-methyl-3-azetidinamine dihydrochloride
[1138] N,3-Diethyl-N-methyl-3-azetidinamine dihydrochloride was
prepared according to procedure described for the preparation of
3-ethyl-N,N-dimethyl-3-azetidinamine dihydrochloride (Example 211),
utilizing N-methylethanamine in place of dimethylamine in Part A.
LCMS: (M+H).sup.+144.1.
Part B
[(2R)-3-[2-(2-Chloro-6-{3-ethyl-3-[ethyl(methyl)amino]-1-azetidinyl}-5-flu-
oro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide
[1139]
[(2R)-3-[2-(2-Chloro-6-{3-ethyl-3-[ethyl(methyl)amino]-1-azetidinyl-
}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide was prepared in a manner similar to Example 176,
utilizing N,3-diethyl-N-methyl-3-azetidinamine dihydrochloride in
place of 1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in
Part C. LCMS: (M+H).sup.+500.3.
Example 231
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(9aS)-hexahydropyrazino[2,1--
c][1,4]oxazin-8(1H)-yl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-oxopropy-
l)hydroxyformamide
##STR00253##
[1141]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-6-[(9aS)-hexahydropyrazi-
no[2,1-c][1,4]oxazin-8(1H)-yl]-2-(methylthio)-4-pyrimidinyl]hydrazino}-3-o-
xopropyl)hydroxyformamide was prepared according to General
Procedure C, utilizing (9aS)-octahydropyrazino[2,1-c][1,4]oxazine
dihydrochloride (Example 22) in place of azetidine hydrochloride in
Part A. LCMS: (M+H).sup.+512.2.
Example 232
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(dimethylamino)methyl]-1-pyrrolidinyl}-5-f-
luoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
##STR00254##
[1142] Part A
N,N-Dimethyl-1-(phenylcarbonyl)-L-prolinamide
[1143] N,N-Dimethyl-L-prolinamide (2.50 g, 17.58 mmol) was
dissolved in a mixture of CH.sub.2Cl.sub.2 (50 mL) and water (50
mL), then solid sodium bicarbonate (2.95 g, 35.16 mmol) was added,
followed by benzoyl chloride (2.1 mL, 18.45 mmol). After stirring
overnight, the phases were separated, and the aqueous phase was
extracted with CH.sub.2Cl.sub.2 (3.times.50 mL). The combined
organic phase was dried over anhydrous Na.sub.2SO.sub.4, filtered,
and concentrated in vacuo to provide
N,N-dimethyl-1-(phenylcarbonyl)-L-prolinamide (4.502 g, >99%).
LCMS: (M+H).sup.+: 247.2.
Part B
N,N-Dimethyl-1-[(2S)-1-(phenylmethyl)-2-pyrrolidinyl]methanamine
[1144] N,N-Dimethyl-1-(phenylcarbonyl)-L-prolinamide (4.50 g,
18.269 mmol) was dissolved in 100 mL of THF, cooled to 0.degree.
C., and then LiAlH.sub.4 (1.386 mg, 36.54 mmol) was added portion
wise. The mixture was heated to 80.degree. C. for 2 h, then allowed
to cool to RT. The reaction was quenched in succession with
H.sub.2O (1.5 mL), 15% aq. NaOH (1.5 mL) and H.sub.2O (4.5 mL) and
was stirred at room temperature overnight. The contents were
filtered, and the filtrate was concentrated in vacuo to provide
N,N-dimethyl-1-[(2S)-1-(phenylmethyl)-2-pyrrolidinyl]methanamine
(3.7305 g, 94%). LCMS: (M+H).sup.+: 219.1.
Part C
N,N-Dimethyl-1-[(2S)-2-pyrrolidinyl]methanamine hydrochloride
[1145]
N,N-Dimethyl-1-[(2S)-1-(phenylmethyl)-2-pyrrolidinyl]methanamine
(3.730 g, 17.08 mmol) was dissolved in a mixture of MeOH (100 mL)
and 1N HCl (35 mL, 34.16 mmol), degassed and placed under argon.
10% Pd/C (1.119 g) was added, and the contents were thoroughly
degassed and placed under a hydrogen balloon for 2 h. The contents
were then degassed, and the Pd/C was removed by filtration through
a fiberglass filter, washing with MeOH. The filtrate was
concentrated in vacuo to provide pure
N,N-dimethyl-1-[(2S)-2-pyrrolidinyl]methanamine hydrochloride
(3.3701 g, >99%). LCMS: (M+H).sup.+: 129.1.
Part D
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(dimethylamino)methyl]-1-pyrrolidinyl}-5-f-
luoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide
[1146]
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(dimethylamino)methyl]-1-pyrrolidin-
yl}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hy-
droxyformamide was prepared according to General Procedure E,
utilizing N,N-dimethyl-1-[(2S)-2-pyrrolidinyl]methanamine
hydrochloride in place of isopropyl amine in Part A. LCMS:
(M+H).sup.+: 486.0.
Example 233
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00255##
[1147] Part A
2-(3-Bromo-2-oxopropyl)-1H-isoindole-1,3(2H)-dione
[1148] Commercially available phthalimidoacetone (2.0 g, 9.8522
mmol), under a nitrogen atmosphere, was taken up in diethylene
glycol (13 mL) and cooled to 0.degree. C. in an ice bath. Bromine
(0.51 mL, 9.9242 mmol) was added dropwise. The reaction was
shielded from light, allowed to reach ambient temperature, and
stirred overnight. LCMS: (M+H).sup.+=282.0.
Part B
2-(1,3-Thiazol-4-ylmethyl)-1H-isoindole-1,3(2H)-dione
[1149] Ether (7.5 mL) was added to the above solution of
2-(3-bromo-2-oxopropyl)-1H-isoindole-1,3(2H)-dione and cooled to
0.degree. C. in an ice/NaCl salt bath. Then thioformamide (European
Journal of Medicinal Chemistry, 2004, 39, 867-872.) (1.20 g) in
EtOH (8 mL) was added, and the reaction was stirred overnight. The
solvents were evaporated and the reaction mixture was purified by
RP-HPLC to provide
2-(1,3-thiazol-4-ylmethyl)-1H-isoindole-1,3(2H)-dione as a white
solid. LCMS: (M+H).sup.+=245.1.
Part C
(1,3-Thiazol-4-ylmethyl)amine
[1150] 2-(1,3-Thiazol-4-ylmethyl)-1H-isoindole-1,3(2H)-dione
(0.6556 g, 2.69 mmol) dissolved in EtOH (15 mL) and hydrazine
monohydrate (0.145 mL, 2.98 mmol) was placed in a sealed round
bottom and heated to 70.degree. C. for 2.5 hours, then stirred at
ambient temperature overnight. After diluting with EtOH, the solids
were filtered off, washed with EtOH, and the filtrate was
evaporated to provide (1,3-thiazol-4-ylmethyl)amine as a beige
solid (0.1491 g, 49%). LCMS: (M+H).sup.+=115.1.
Part D
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimidinyl}-1,1-
,2-hydrazinetricarboxylate
[1151] To a suspension of (1,3-thiazol-4-ylmethyl)amine (0.1491 g,
1.308 mmol) in THF (10 mL) was added a solution of
tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.649 g, 1.308 mmol) and triethylamine (0.22 mL, 1.5784 mmol) in
THF (2 mL). Additional THF (3 mL) was added, and the reaction was
stirred overnight. Then the reaction mixture was diluted with
water, and the aqueous layer was extracted with ethyl acetate. The
organics were dried (Na.sub.2SO.sub.4) and concentrated. The
resulting crude material was purified by silica gel chromatography
(0-100% ethyl acetate in hexanes) to produce
tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimidinyl}-1,1-
,2-hydrazinetricarboxylate as a yellow oil (0.51 g, 68%). LCMS:
(M-2Boc)=375.0.
Part E
2-Chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4(1H)-pyrimidinone
hydrazone
[1152] Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimidinyl}-1,1-
,2-hydrazinetricarboxylate (0.51 g, 0.8868 mmol) was dissolved in
MeOH (5 mL) and HCl (4M in 1,4-dioxane) (5 mL). The reaction
mixture was left to stir overnight, then evaporated and purified by
RP-HPLC to provide
2-chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4(1H)-pyrimidinone
hydrazone as an orange oil (0.105 g). LCMS: (M+H).sup.+=275.0.
Part F
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-yl-
oxy)formamide
[1153]
2-Chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4(1H)-pyrimidin-
one hydrazone (0.105 g) and
(2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}pr-
opanoic acid (0.182 g, 0.422 mmol) were dissolved in DMF (5 mL).
NMM (0.21 mL, 1.91 mmol) was added, followed by HOAt (0.063 g,
0.463 mmol) and EDC (0.088 g, 0.459 mmol). After stirring for 2
days, the reaction mixture was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyran-2-y-
loxy)formamide as a maroon solid (0.1133 g). LCMS:
(M+H).sup.+=556.0.
Part G
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimidi-
nyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[1154]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](tetrahydro-2H-pyr-
an-2-yloxy)formamide (0.1133 g, 0.204 mmol) was dissolved in acetic
acid (8 mL) and water (2 mL). This reaction mixture was left to
stir overnight. The volatiles were evaporated, and the resulting
residue was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1,3-thiazol-4-ylmethyl)amino]-4-pyrimid-
inyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
(0.0497 g, 52%). LCMS: (M+H).sup.+=472.1.
Example 234
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R)-2-(fluoromethyl)-1-pyrrolidinyl]-4-p-
yrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00256##
[1156]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2R)-2-(fluoromethyl)-1-pyrrolidin-
yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide was prepared according to General Procedure E, utilizing
(2R)-fluoromethylpyrrolidine (Bioorg. Med. Chem. Lett. 2007, 17,
1443-1446) in place of isopropyl amine in Part A and 2.0 M HCl in
ether with DCM as a solvent in Part B. LCMS: (M+H).sup.+:
461.1/463.0.
Example 235
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(2S)-2-[(dimethylamino)methyl]-1-pyrr-
olidinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfo-
rmamide
##STR00257##
[1158]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(2S)-2-[(dimethylamino)methyl]-
-1-pyrrolidinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hy-
droxyformamide was prepared according to General Procedure A,
utilizing N,N-dimethyl-1-[(2S)-2-pyrrolidinyl]methanamine
hydrochloride in place of pyrrolidine in Part A. LCMS: (M+H).sup.+:
466.2.
Example 236
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3R)-3-methyl-4-morpholinyl]-4-pyrimidiny-
l}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00258##
[1160] (2R)-2-Amino-1-propanol was employed to prepare
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(3R)-3-methyl-4-morpholinyl]-4-pyrimidin-
yl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
according to the procedures of Example 241.
Example 237
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,5S)-2,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00259##
[1161] Part A
(2S,5S)-1,2,5-Trimethyl-4-(phenylmethyl)piperazine
[1162] To a solution of
(2S,5S)-2,5-dimethyl-1-(phenylmethyl)piperazine (J. Med. Chem.
2006, 49, 716-726) (770 mg, 3.77 mmol) in dichloromethane (25 mL)
at 0.degree. C. was added formaldehyde (0.396 mL, 37% water
solution, 5.28 mmol) followed by sodium triacetoxyborohydride (959
mg, 4.52 mmol). The reaction mixture was allowed to warm to room
temperature and stirred for 2 h before being diluted with
dichloromethane and washed with 1N NaOH solution. The organics were
washed with brine, dried (MgSO.sub.4) and evaporated to yield
(2S,5S)-1,2,5-trimethyl-4-(phenylmethyl)piperazine (782 mg, 95%).
LCMS: (M+H).sup.+: 219.1.
Part B
(2S,5S)-1,2,3-Trimethylpiperazine, hydrochloride salt
[1163] (2S,5S)-1,2,5-Trimethyl-4-(phenylmethyl)piperazine (782 mg,
3.58 mmol) was dissolved in 50 mL of MeOH, degassed and placed
under argon. 10% Pd/C (200 mg) was added, and the contents were
thoroughly degassed and placed under a hydrogen balloon for
approximately 3 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
After 7.5 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the hydrochloride salt of
(2S,5S)-1,2,5-trimethylpiperazine (715 mg, 100%). LCMS:
(M+H).sup.+: 129.1.
Part C
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,5S)-2,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
[1164]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S,5S)-2,4,5-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure G,
utilizing (2S,5S)-1,2,5-trimethylpiperazine, hydrochloride salt in
place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 238
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(5-fluoro-2-pyridinyl)amino]-
-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00260##
[1165] Part A
5-Fluoro-6-[(5-fluoro-2-pyridinyl)amino]-2-methyl-4(1H)-pyrimidinone
hydrazone
[1166] A solution of 2-amino-5-fluoropyrimidine (110 mg, 1 mmol) in
THF (5 mL) was cooled to 0.degree. C. and NaH (60% dispersion in
oil) (72 mg, 1.8 mmol) was added. The reaction mixture was stirred
at reduced temperature for 10 min, and room temperature for 20 mins
before once again being cooled to 0.degree. C.
4,6-Dichloro-5-fluoro-2-methylpyrimidine (180 mg, 1 mmol) was added
and the reaction was warmed to room temperature and stirred for 1.5
hours. Water was then added and the solution was extracted with
EtOAc. The combined organics were dried over sodium sulfate and
concentrated, yielding crude material. This was dissolved in DMSO
(4 mL) and hydrazine (1 mL) was added. The resulting mixture was
heated to 60.degree. C. and stirred for 5 hours. Upon cooling
5-fluoro-6-[(5-fluoro-2-pyridinyl)amino]-2-methyl-4(1H)-pyrimidinone
hydrazone (63 mg, 25%) precipitated and was isolated by filtration.
LCMS: (M+H).sup.+: 253.1.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(5-fluoro-2-pyridinyl)amino]-
-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1167]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(5-fluoro-2-pyridinyl-
)amino]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure A, Parts B and C,
utilizing
5-fluoro-6-[(5-fluoro-2-pyridinyl)amino]-2-methyl-4(1H)-pyrimidinone
hydrazone in place of
5-fluoro-4-hydrazino-2-methyl-6-(1-pyrrolidinyl)pyrimidine in Part
B. LCMS: (M+H).sup.+: 450.1.
Example 239
[(2R)-3-(2-{2-Chloro-6-[(2-cyanoethyl)(cyclopropyl)amino]-5-fluoro-4-pyrim-
idinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00261##
[1169]
[(2R)-3-(2-{2-Chloro-6-[(2-cyanoethyl)(cyclopropyl)amino]-5-fluoro--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamid-
e was prepared according to General Procedure D, utilizing
commercially-available 3-(cyclopropylamino)propanenitrile in place
of N-methylpiperazine in Part A. LCMS: (M+H).sup.+468.1.
Example 240
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mor-
pholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00262##
[1170] Part A
(3S)-4-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-3-methylmorpholine
[1171] To a solution of (3S)-3-methylmorpholine hydrochloride
(0.1591 g, 1.156 mmol, prepared according to the procedures of
Example 241) in MeOH (3 mL) was added N,N-diisopropylethylamine
(0.440 mL, 2.526 mmol) and 4,6-dichloro-5-fluoro-2-methylpyrimidine
(0.2085 g, 1.152 mmol). The solution was heated at 140.degree. C.
under microwave irradiation for 30 min, and then concentrated in
vacuo. The resulting solid was triturated with water, collected by
vacuum filtration, and washed with water. To a solution of the
resulting solid in dioxane (11 mL) was added hydrazine hydrate
(0.210 mL). The mixture was heated and stirred at 80.degree. C.
overnight, and then cooled to room temperature and concentrated in
vacuo. The residue was partitioned between DCM (100 mL) and sat.
aq. NaHCO.sub.3 (30 mL). The organic phase was dried over anhydrous
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to give
(3S)-4-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-3-methylmorpholine
(0.2148 g, 77% yield) as a yellow oil. LCMS: (M+H).sup.+:
242.1.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mor-
pholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1172] To a solution of
(3S)-4-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-3-methylmorpholine
(0.2123 g, 0.880 mmol) in DMF (4 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid, N,N-diisopropylethylamine salt, isopropanol solvate (327.1
mg, 0.661 mmol), N-methylmorpholine (0.290 ml, 2.64 mmol),
1-hydroxy-7-azabenzotriazole (0.108 g, 0.794 mmol), and EDC (0.152
g, 0.793 mmol). The solution was stirred overnight, and then
purified directly by Gilson RPLC. To a solution of the residue in
MeOH (7 mL) was added 10% Pd/C (50% water, 88 mg). The mixture was
hydrogenated under balloon pressure for 1 h, and then filtered
through a PTFE membrane. The resulting solution was concentrated in
vacuo, dissolved in EtOAc, and concentrated in vacuo. The solid was
collected by vacuum filtration and washed with hexanes to give
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mo-
rpholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
(0.2326 g, 80% yield) as a white solid. LCMS: (M+H).sup.+:
439.2.
Example 241
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S)-3-methyl-4-morpholinyl]-4-pyrimidiny-
l}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00263##
[1173] Part A
(2S)-2-[(Phenylmethyl)amino]-1-propanol
[1174] To a solution of (2S)-2-amino-1-propanol (5.01 g, 66.70
mmol) in toluene (130 mL) was added benzaldehyde (7.08 mL, 70.05
mmol). The flask was fitted with a Dean-Stark trap, and the
solution was heated at 150.degree. C. for 2 h. The solution was
then cooled to room temperature and concentrated in vacuo. To a
0.degree. C. solution of the residue in EtOH (130 mL) was added
NaBH.sub.4 (6.31 g, 166.8 mmol) and sufficient 4 N HCl in dioxane
to adjust the pH to ca. 2. The mixture was stirred overnight and
then concentrated in vacuo. The residue was partitioned between 1 N
aq. HCl (200 mL) and DCM (100 mL). The aqueous phase was washed
with a fresh portion of DCM (100 mL), and then adjusted to pH>13
with 6 N aq. NaOH. The aqueous phase was extracted with DCM
(2.times.150 mL), and the combined organic phase was dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to
provide (2S)-2-[(phenylmethyl)amino]-1-propanol (10.52 g, 95%) as a
colorless oil. LCMS: (M+H).sup.+: 166.1.
Part B
(5S)-5-Methyl-4-(phenylmethyl)-3-morpholinone
[1175] To a solution of (2S)-2-[(phenylmethyl)amino]-1-propanol
(10.52 g, 63.67 mmol) in THF (65 mL) was added a solution of
K.sub.2CO.sub.3 (26.40 g, 191.0 mmol) in water (65 mL). The
vigorously stirred mixture was cooled to 0.degree. C., and
chloroacetyl chloride (7.10 mL, 89.14 mmol) was added dropwise over
20 min. The mixture was stirred for 1 h, and then an additional
portion of chloroacetyl chloride (0.500 mL, 6.278 mmol) was added
dropwise. The mixture was stirred for 1 h, and then the mixture was
adjusted to pH>13 with 50% aq. NaOH (ca. 20 mL). The mixture was
stirred and warmed to room temperature overnight, and then
extracted with DCM (250 mL). The organic phase was washed with 1 N
aq. HCl, followed by water. The organic phase was dried over
anhydrous Na.sub.2SO.sub.4, filtered, and concentrated in vacuo to
give (5S)-5-methyl-4-(phenylmethyl)-3-morpholinone (12.74 g, 97%)
as a colorless oil. LCMS: (M+H).sup.+: 206.1.
Part C
(3S)-3-Methyl-4-(phenylmethyl)morpholine
[1176] To a 0.degree. C. solution of
(5S)-5-methyl-4-(phenylmethyl)-3-morpholinone (12.74 g, 62.07 mmol)
in toluene (150 mL) was added Red-Al (65% w/w in PhMe, 38 mL)
dropwise via addition funnel. The resulting solution was heated at
60.degree. C. and stirred for 4 h, then cooled to 40.degree. C. and
stirred overnight. The solution was then cooled to 0.degree. C. and
quenched by dropwise addition of 1 N aq. NaOH (15 mL). The mixture
was diluted with Et.sub.2O (100 mL) and washed with 1 N aq. NaOH
(100 mL) followed by brine (50 mL). The organic phase was dried
over anhydrous Na.sub.2SO.sub.4, filtered, concentrated in vacuo,
and azeotroped with MeOH (50 mL) to provide
(3S)-3-methyl-4-(phenylmethyl)morpholine (11.33 g, 95%) as a
faintly pink oil. LCMS: (M+H).sup.+: 192.2.
Part D
(3S)-3-Methylmorpholine hydrochloride
[1177] To a solution of (3S)-3-methyl-4-(phenylmethyl)morpholine
(11.33 g, 59.24 mmol) in MeOH (150 mL) was added 6 N aq. HCl (9.9
mL, 59.4 mmol) and 10% Pd/C (50% water, 1.13 g). The suspension was
hydrogenated under balloon pressure overnight, and then filtered
through a glass fiber filter. The resulting yellow solution was
concentrated in vacuo and azeotroped with MeOH (4.times.150 mL) to
afford (3S)-3-methylmorpholine hydrochloride (8.17 g, quantitative
yield) as a yellow oil that solidified under high vacuum. LCMS:
(M+H).sup.+: 102.2.
Part E
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(3S)-3-methyl-4-morpholinyl]-4-pyrimidinyl}-1,1,2-
-hydrazinetricarboxylate
[1178] To a solution of (3S)-3-methylmorpholine hydrochloride
(0.2059 g, 1.496 mmol) in DMF (7.5 mL) was added
tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(0.7451 g, 1.498 mmol), and N,N-diisopropylethylamine (0.575 mL,
3.301 mmol). The solution was stirred overnight, and then diluted
with Et.sub.2O (150 mL). The mixture was washed with water
(2.times.50 mL), and the combined aqueous phase was extracted with
a fresh portion of Et.sub.2O (50 mL). This Et.sub.2O layer was
washed with a fresh portion of water (50 mL), and the combined
organic phase was diluted with DCM (50 mL), dried over anhydrous
Na.sub.2SO.sub.4, filtered, concentrated in vacuo, and azeotroped
with EtOAc. The solid was collected by vacuum filtration and washed
with hexanes. The supernatant was concentrated in vacuo, and
purified by gradient silica gel chromatography (0% to 100% EtOAc in
hexanes; 1% Et.sub.3N). The desired fractions were concentrated in
vacuo, and the resulting solid was collected by vacuum filtration,
washed with hexanes, and combined with the first crop of solid to
give tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(3S)-3-methyl-4-morpholinyl]-4-pyrimidinyl}-1,1,2-
-hydrazinetricarboxylate (0.6610 g, 79%) as a white solid. LCMS:
(M+H).sup.+: 562.2.
Part F
(3S)-4-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-3-methylmorpholine
dihydrochloride
[1179] To a solution of tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(3S)-3-methyl-4-morpholinyl]-4-pyrimidinyl}-1,1,2-
-hydrazinetricarboxylate (0.6552 g, 1.166 mmol) in DCM (12 mL) was
added 2 N HCl in Et.sub.2O (12 mL, 24 mmol). The solution was
stirred for 2 days, and the resulting mixture was concentrated in
vacuo. The solid was triturated with Et.sub.2O and collected by
vacuum filtration to afford
(3S)-4-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-3-methylmorpholine
dihydrochloride (0.2543 g, 65%) as a yellow solid. LCMS:
(M+H).sup.+: 262.0.
Part G
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mor-
pholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]formamid-
e
[1180] To a solution of
(3S)-4-(5-fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-3-methylmorpholine
dihydrochloride (251.5 mg, 0.752 mmol) in DMF (6 mL) was added
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid, N,N-diisopropylethylamine salt, isopropanol solvate (306.1
mg, 0.619 mmol), N-methylmorpholine (0.410 ml, 3.73 mmol),
1-hydroxy-7-azabenzotriazole (0.101 g, 0.742 mmol), and EDC (0.142
g, 0.741 mmol). The solution was allowed to stir overnight, and was
then purified directly by Gilson RPLC to give
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mo-
rpholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]formami-
de (314.6 mg, 93%) as an orange foam. LCMS: (M+H).sup.+: 549.2.
Part H
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mor-
pholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1181] To a solution of
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mo-
rpholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl][(phenylmethyl)oxy]formami-
de (309.1 mg, 0.563 mmol) in methanol (6 mL) was added 20%
Pd(OH).sub.2/C (50% water, 62 mg). The suspension was hydrogenated
for 1 h and then filtered through a PTFE membrane. The resulting
solution was concentrated in vacuo and purified by Gilson RPLC to
give
[(2R)-2-(cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(3S)-3-methyl-4-mo-
rpholinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
(94.0 mg, 36%) as a white solid following crystallization from
EtOAc-Et.sub.2O. LCMS: (M+H).sup.+: 459.1.
Example 242
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S,5S)-3,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxyforma-
mide
##STR00264##
[1182] Part A
(3S,5S)-3,5-Dimethyl-2-piperazinone
[1183] A mixture of methyl
N-{(1S)-2-[bis(phenylmethyl)amino]-1-methylethyl}-L-alaninate (J.
Org. Chem. 1995, 60, 4177-4183) (2.156 g, 6.33 mmol), concentrated
hydrochloric acid 37% (0.805 mL), 5% palladium on carbon (0.863 g),
and EtOH (40 mL) was hydrogenated under a hydrogen balloon for 48
h. The mixture was filtered through Celite, and the solids were
washed with MeOH and CH.sub.2Cl.sub.2. The filtrates were combined
and concentrated under reduced pressure. The residue was
redissolved in EtOH (55 mL), p-toluenesulfonic acid (0.344 g) was
added, and the mixture was heated at reflux for 16 h. The mixture
was concentrated under reduced pressure and partitioned between
CH.sub.2Cl.sub.2 and NaHCO.sub.3. The aqueous layer was back
extracted with CH.sub.2Cl.sub.2, and the combined organic layers
were dried (MgSO.sub.4), filtered, and concentrated under reduced
pressure. The residue was purified by flash chromatography (9:1,
CH.sub.2Cl.sub.2:MeOH) to provide methyl
N-{(1S)-1-methyl-2-[(phenylmethyl)amino]ethyl}-L-alaninate (685 mg,
50%). LCMS: (M+H).sup.+: 129.1. The leftover aqueous layer was
extracted further with 40% isopropanol in CHCl.sub.3 twice, and the
combined organic layers were dried (Na.sub.2SO.sub.4), filtered,
and concentrated to yield (3S,5S)-3,5-dimethyl-2-piperazinone (306
mg, 38%). LCMS: (M+H).sup.+: 129.1.
Part B
(3S,5S)-3,4,5-Trimethyl-2-piperazinone
[1184] To a solution of (3S,5S)-3,5-dimethyl-2-piperazinone in
methanol (12 mL) at room temperature was added formaldehyde (0.345
mL, 37% water solution, 4.6 mmol) followed by sodium borohydride
(261 mg, 6.9 mmol). The reaction mixture was stirred for 2 h before
being diluted with dichloromethane and washed with 1N NaOH
solution. The aqueous layer was back extracted with
CH.sub.2Cl.sub.2 three times, and the combined organic layers were
washed with brine, dried (MgSO.sub.4) and evaporated to yield
(3S,5S)-3,4,5-trimethyl-2-piperazinone (128 mg, 39%). LCMS:
(M+H).sup.+: 143.1.
Part C
(2S,6S)-1,2,6-Trimethylpiperazine, hydrochloride salt
[1185] 1M LAH in THF (3 mL, 3 mmol) was added dropwise to
(3S,5S)-3,4,5-trimethyl-2-piperazinone (123 mg, 0.86 mmol). The
reaction was allowed to warm to room temperature, then stirred at
room temperature for 40 min and at reflux for an additional 5 h.
After cooling to room temperature, the reaction was quenched by the
sequential addition of H.sub.2O (0.114 mL), 15% NaOH (0.114 mL),
and H.sub.2O (0.342 mL). The mixture was stirred for 0.5 h, and the
solids were filtered off and washed with excess THF. To the
combined filtrates was added 1.8 mL 1N HCl, followed by
concentration under reduced pressure to provide the hydrochloride
salt of (2S,6S)-1,2,6-trimethylpiperazine (162 mg, 93%). LCMS:
(M+H).sup.+: 129.1.
Part D
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S,5S)-3,4,5-trimethyl-1-piperazinyl]--
4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
[1186]
N-[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(3S,5S)-3,4,5-trimethyl-1-pipera-
zinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydro-
xyformamide was prepared according to General Procedure G,
utilizing (2S,6S)-1,2,6-trimethylpiperazine, hydrochloride salt in
place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 486.1.
Example 243
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-2-methyl-6-[(2S)-2-(4-morpholin-
ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyform-
amide
##STR00265##
[1187] Part A
4-[(2S)-2-Pyrrolidinylmethyl]morpholine hydrochloride
[1188] 4-[(2S)-2-Pyrrolidinylmethyl]morpholine hydrochloride was
prepared according to Example 264, Part A through Part C, utilizing
commercially-available morpholine in place of piperidine in Part A.
LCMS: (M+H).sup.+: 171.1.
Part B
4-{[(2S)-1-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-2-pyrrolidinyl]me-
thyl}morpholine
[1189]
4-{[(2S)-1-(5-Fluoro-6-hydrazino-2-methyl-4-pyrimidinyl)-2-pyrrolid-
inyl]methyl}morpholine was prepared in a manner similar to Example
210, Part E and Part F, utilizing
4-[(2S)-2-pyrrolidinylmethyl]morpholine hydrochloride in place of
1-{1-[(2S)-2-pyrrolidinyl]cyclopropyl}pyrrolidine hydrochloride in
Part E. LCMS: (M+H).sup.+: 508.2.
Example 244
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3-fluoro-1-azetidinyl)-4-pyrimidinyl]hydr-
azino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00266##
[1191]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(3-fluoro-1-azetidinyl)-4-pyrimidin-
yl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
3-fluoroazetidine hydrochloride (Hulin, Bernard; Piotrowski, David
W. US 2005256310) in place of N-methylpiperazine in Part A. LCMS:
(M+H).sup.+433.0.
Example 245
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-pyrrolidinyl]-4--
pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00267##
[1193]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-pyrrolidi-
nyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfor-
mamide was prepared according to General Procedure E, utilizing
commercially-available (2S)-2-pyrrolidinylmethanol in place of
isopropyl amine in Part A. LCMS: (M+H).sup.+: 459.1.
Example 246
[1194]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-methyl-1-pyrazolidinyl)-4-pyrimi-
dinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00268##
Part A
1,1-Dimethylethyl 3-oxo-1-pyrazolidinecarboxylate
[1195] To a mixture of 3-pyrazolidinone hydrochloride (3.84 g,
31.33 mmol) in water (50 ml) and dioxane (10 ml) was added slowly
sodium carbonate (6.64 g, 62.66 mmol), followed by a solution of
bis(1,1-dimethylethyl)dicarbonate in dioxane (20 ml). The mixture
was stirred at rt for 1 h. Water (50 ml) was added, and the mixture
was extracted with dichloromethane (2.times.150 ml). The combined
organic solution was washed with water (2.times.50 ml), dried
(Na.sub.2SO.sub.4) and concentrated to provide 1,1-dimethylethyl
3-oxo-1-pyrazolidinecarboxylate (4.00 g, 68.6%). LCMS:
(M+H).sup.+186.9.
Part B
1,1-Dimethylethyl 2-methyl-3-oxo-1-pyrazolidinecarboxylate
[1196] To a mixture of 1,1-dimethylethyl
3-oxo-1-pyrazolidinecarboxylate (1.00 g, 5.37 mmol) and potassium
carbonate (0.89 g, 6.44 mmol) in DMF (10 ml) was added iodomethane
(2 M in MTBE, 3.22 ml, 6.44 mmol). The reaction mixture was stirred
at rt for 2 h. LCMS indicated completion of the reaction. The
mixture was diluted with ethyl acetate/hexanes (1:1, 150 ml) and
washed with water (5.times.50 ml), brine (50 ml), dried
(Na.sub.2SO.sub.4) and concentrated to provide 1,1-dimethylethyl
2-methyl-3-oxo-1-pyrazolidinecarboxylate (0.57 g, 53.0%). LCMS:
(M+H).sup.+201.0.
Part C
1,1-Dimethylethyl 2-methyl-1-pyrazolidinecarboxylate
[1197] To a solution of 1,1-dimethylethyl
2-methyl-3-oxo-1-pyrazolidinecarboxylate (0.98 g, 4.89 mmol) in dry
dichloromethane was added borane dimethyl sulfide complex (1.16 ml,
12.24 mmol). The mixture was stirred at rt overnight. LCMS
indicated .about.40% starting material left. Another portion of
borane dimethyl sulfide complex (0.5 ml, 5.28 mmol) was added, and
stirring continued overnight. Methanol was added dropwise to the
reaction mixture until bubbling ceased. Water (1 ml) was then
added, and the mixture was refluxed for 1 h. After cooling to rt,
the mixture was concentrated to dryness under vacuum. The residue
was taken up in water (30 ml) and dichloromethane (45 ml), the
organic layer was separated, and the aqueous layer was extracted
with dichloromethane (45 ml). The combined organic solution was
dried (Na.sub.2SO.sub.4), filtered and concentrated to provide
1,1-dimethylethyl 2-methyl-1-pyrazolidinecarboxylate (0.48 g,
52.7%). LCMS: (2M+H).sup.+372.9.
Part D
1-Methylpyrazolidine hydrochloride
[1198] A solution of 1,1-dimethylethyl
2-methyl-1-pyrazolidinecarboxylate (0.48 g, 2.58 mmol) in 4N HCl in
dioxane (5 ml) was stirred at rt overnight. LCMS indicated
completion of the reaction. Removal of the volatiles under vacuum
afforded 1-methylpyrazolidine hydrochloride (0.41 g, presumed 77%
pure) as a white solid.
Part E
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-methyl-1-pyrazolidinyl)-4-pyrimidinyl]h-
ydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1199]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-methyl-1-pyrazolidinyl)-4-pyrimi-
dinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared in a manner similar to Example 176, utilizing
1-methylpyrazolidine hydrochloride in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part C.
LCMS: (M+H).sup.+444.1.
Example 247
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(2-hydroxyethyl)-1-py-
rrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00269##
[1200] Part A
2-[(2S)-2-Pyrrolidinyl]ethanol
[1201] 2-[(2S)-2-Pyrrolidinyl]ethanol was prepared according to
literature procedure (WO9748681, 1997), utilizing (S)-2-pyrrolidine
methanol in place of the (R) enantiomer.
Part B
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(2-hydroxyethyl)-1-py-
rrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1202]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(2-hydroxyethy-
l)-1-pyrrolidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyfo-
rmamide was prepared according to General Procedure A, utilizing
2-[(2S)-2-pyrrolidinyl]ethanol in place of pyrrolidine in Part A.
LCMS: (M+H).sup.+: 453.1.
Example 248
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(2-hydroxyethyl)-1-pyrrolidinyl]-4-
-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00270##
[1204]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(2-hydroxyethyl)-1-pyrrolid-
inyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfo-
rmamide was prepared according to General Procedure E, utilizing
2-[(2S)-2-pyrrolidinyl]ethanol (Example 247) in place of isopropyl
amine in Part A, and 2.0 M HCl in ether with DCM as a solvent in
part B. LCMS: (M+H).sup.+: 473.1/475.2.
Example 249
[(2R)-3-{2-[2-Chloro-5-fluoro-64(2S)-2-{[(2-hydroxyethyl)(methyl)amino]met-
hyl}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxop-
ropyl]hydroxyformamide
##STR00271##
[1206]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-((2S)-2-{[(2-hydroxyethyl)(methyl)a-
mino]methyl}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl-
)-3-oxopropyl]hydroxyformamide was prepared in a manner similar to
Example 264, utilizing commercially-available
2-(methylamino)ethanol in place of piperidine in Part A. LCMS:
(M+H).sup.+: 517.0.
Example 250
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-({methyl[2-(methyloxy)ethyl]amino}-
methyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-o-
xopropyl]hydroxyformamide
##STR00272##
[1208]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-({methyl[2-(methyloxy)ethyl-
]amino}methyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmeth-
yl)-3-oxopropyl]hydroxyformamide was prepared in a manner similar
to Example 264, utilizing commercially-available
N-methyl-2-(methyloxy)ethanamine in place of piperidine in Part A.
LCMS: (M+H).sup.+: 530.1.
Example 251
[(2R)-3-{2-[2-Chloro-6-(3,3-difluoro-1-azetidinyl)-5-fluoro-4-pyrimidinyl]-
hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00273##
[1210]
[(2R)-3-{2-[2-Chloro-6-(3,3-difluoro-1-azetidinyl)-5-fluoro-4-pyrim-
idinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared in a manner similar to Example 176, utilizing
3,3-difluoroazetidine hydrochloride (Carling, William Robert;
Mitchinson, Andrew; Russell, Michael Geoffrey Neil; Street, Leslie
Joseph. WO 2000047582) in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part C.
LCMS: (M+H).sup.+450.9.
Example 252
[(2R)-3-(2-{6-[(2S)-2-Cyano-1-pyrrolidinyl]-5-fluoro-2-methyl-4-pyrimidiny-
l}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00274##
[1212]
[(2R)-3-(2-{6-[(2S)-2-Cyano-1-pyrrolidinyl]-5-fluoro-2-methyl-4-pyr-
imidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure F, utilizing
commercially-available (2S)-2-pyrrolidinecarbonitrile hydrochloride
in place of 3-pyrroline in Part A. LCMS: (M+H).sup.+: 434.1.
Example 253
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-((2S)-2-{[ethyl(methyl)amino]methyl}-1-
-pyrrolidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydr-
oxyformamide
##STR00275##
[1214]
((2R)-2-(Cyclopentylmethyl)-3-{2-[6-((2S)-2-{[ethyl(methyl)amino]me-
thyl}-1-pyrrolidinyl)-5-fluoro-2-methyl-4-pyrimidinyl]hydrazino}-3-oxoprop-
yl)hydroxyformamide was prepared in a manner similar to Example
243, utilizing commercially-available ethyl(methyl)amine in place
of morpholine in Part A. LCMS: (M+H).sup.+: 480.3.
Example 254
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(2S)-2-[(diethylamino)methyl]-1-pyrro-
lidinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hydroxyfor-
mamide
##STR00276##
[1216]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(2S)-2-[(diethylamino)methyl]--
1-pyrrolidinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hyd-
roxyformamide was prepared in a manner similar to Example 243,
utilizing commercially-available diethylamine in place of
morpholine in Part A. LCMS: (M+H).sup.+: 494.4.
Example 255
[(2R)-3-{2-[2-Chloro-6-((2S)-2-{[ethyl(methyl)amino]methyl}-1-pyrrolidinyl-
)-5-fluoro-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide
##STR00277##
[1218]
[(2R)-3-{2-[2-Chloro-6-((2S)-2-{[ethyl(methyl)amino]methyl}-1-pyrro-
lidinyl)-5-fluoro-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxoprop-
yl]hydroxyformamide was prepared in a manner similar to Example
197, utilizing commercially-available ethyl(methyl)amine in place
of piperidine in Part A. LCMS: (M+H).sup.+: 500.1.
Example 256
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(diethylamino)methyl]-1-pyrrolidinyl}-5-fl-
uoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfor-
mamide
##STR00278##
[1220]
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(diethylamino)methyl]-1-pyrrolidiny-
l}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide was prepared in a manner similar to Example 264,
utilizing commercially-available diethylamine in place of
piperidine in Part A. LCMS: (M+H).sup.+: 514.0.
Example 257
[(2R)-3-(2-{2-Chloro-6-[(2S)-2-cyano-1-pyrrolidinyl]-5-fluoro-4-pyrimidiny-
l}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00279##
[1222]
[(2R)-3-(2-{2-Chloro-6-[(2S)-2-cyano-1-pyrrolidinyl]-5-fluoro-4-pyr-
imidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure D, utilizing
commercially-available (2S)-2-pyrrolidinecarbonitrile hydrochloride
in place of N-methylpiperazine in Part A. LCMS: (M+H).sup.+:
454.0.
Example 258
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-pip-
eridinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
##STR00280##
[1223] Part A
Phenylmethyl (2S)-2-(hydroxymethyl)-1-piperidinecarboxylate
[1224] (2S)-1-{[(Phenylmethyl)oxy]carbonyl}-2-piperidinecarboxylic
acid (1.0 g, 3.798 mmol) in THF (5 mL) was cooled to -18.degree. C.
and borane-THF complex (3.798 mL, 3.798 mmol) was added over 10
min. The mixture was allowed to warm to room temperature with
stirring overnight, then cooled to 0.degree. C., and water (4 mL)
was added, followed by K.sub.2CO.sub.3 (1.4 g). The phases were
separated, and the aqueous phase was extracted with Et.sub.2O
(3.times.25 mL). The combined organic phase was washed with brine
(1.times.25 mL) and dried over anhydrous MgSO.sub.4, filtered, and
concentrated in vacuo to provide phenylmethyl
(2S)-2-(hydroxymethyl)-1-piperidinecarboxylate (815 mg, 86%). LCMS:
(M+H).sup.+: 250.2.
Part B
(2S)-2-Piperidinecarboxylic acid hydrochloride
[1225] Phenylmethyl (2S)-2-(hydroxymethyl)-1-piperidinecarboxylate
(815 mg, 3.26 mmol) was dissolved in a mixture of MeOH (30 mL) and
1N HCl (7.19 mL, 7.19 mmol), degassed and placed under argon. 10%
Pd/C (225 mg) was added, and the contents were thoroughly degassed
and placed under a hydrogen balloon for 2 h. The contents were then
degassed, and the Pd/C was removed by filtration through a
fiberglass filter, washing with MeOH. The filtrate was concentrated
in vacuo to provide pure
N,N-dimethyl-2-(3-pyrrolidinyl)-2-propanamine hydrochloride (492
mg, 99%). LCMS: (M+H).sup.+: 116.1
Part C
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl)-1-pip-
eridinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1226]
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(2S)-2-(hydroxymethyl-
)-1-piperidinyl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyform-
amide was prepared in a manner similar to Example 210, Part E and
Part F, utilizing N,N-dimethyl-2-(3-pyrrolidinyl)-2-propanamine
hydrochloride in place of
1-{1-[(2S)-2-pyrrolidinyl]cyclopropyl}pyrrolidine hydrochloride in
Part E. LCMS: (M+H).sup.+: 453.3.
Example 259
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-ethyl-1-pyrazolidinyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00281##
[1227] Part A
1-Ethylpyrazolidine hydrochloride
[1228] 1-Ethylpyrazolidine hydrochloride was prepared according to
procedure described for the preparation of 1-methylpyrazolidine
hydrochloride (Example 246), utilizing iodoethane in place of
iodomethane in Part B. LCMS: (M+H).sup.+102.2.
Part B
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-ethyl-1-pyrazolidinyl)-4-pyrimidinyl]hy-
drazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
[1229]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-ethyl-1-pyrazolidinyl)-4-pyrimid-
inyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared in a manner similar to Example 176, utilizing
1-ethylpyrazolidine hydrochloride in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part C.
LCMS: (M+H).sup.+458.3.
Example 260
1-{2-Chloro-6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propa-
noyl)hydrazino]-5-fluoro-4-pyrimidinyl}-N,N-dimethyl-L-prolinamide
##STR00282##
[1230] Part A
N,N-Diethyl-1-(phenylmethyl)-L-prolinamide
[1231] N,N-Diethyl-1-(phenylmethyl)-L-prolinamide was prepared in a
manner similar to Example 210, Part A through Part B, utilizing
commercially-available dimethyl amine in place of pyrrolidine in
Part B. LCMS: (M+H).sup.+: 261.1.
Part B
N,N-Diethyl-L-prolinamide hydrochloride
[1232] N,N-Diethyl-1-(phenylmethyl)-L-prolinamide (1.603 g, 6.156
mmol) was dissolved in a mixture of MeOH (50 mL) and 1N HCl (14 mL,
14 mmol), degassed and placed under argon. 10% Pd/C (480 mg) was
added, and the contents were thoroughly degassed and placed under a
hydrogen balloon for 2 h. The contents were then degassed, and the
Pd/C was removed by filtration through a fiberglass filter, washing
with MeOH. The filtrate was concentrated in vacuo to provide pure
N,N-diethyl-L-prolinamide hydrochloride (1.658 g, >99%). LCMS:
(M+H).sup.+: 171.1.
Part C
1-{2-Chloro-6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methyl}propa-
noyl)hydrazino]-5-fluoro-4-pyrimidinyl}-N,N-dimethyl-L-prolinamide
[1233]
1-{2-Chloro-6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]methy-
l}propanoyl)hydrazino]-5-fluoro-4-pyrimidinyl}-N,N-dimethyl-L-prolinamide
was prepared according to General Procedure E, utilizing
N,N-diethyl-L-prolinamide hydrochloride in place of isopropyl amine
in Part A. LCMS: (M+H).sup.+: 528.3.
Example 261
N-[(2R)-3-(2-{2-Chloro-6-[(2R,5R)-5-ethyl-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N-hydroxy-
formamide
##STR00283##
[1234] Part A
(2R,5R)-2-Ethyl-1,5-dimethyl-4-(phenylmethyl)piperazine
[1235] To a solution of
(2R,5R)-5-ethyl-2-methyl-1-(phenylmethyl)piperazine (prepared
according to procedures in J. Med. Chem. 2006, 49, 716-726,
utilizing Boc-D-2-aminobutyric acid in place of N-Boc-L-alanine)
(902 mg, 4.13 mmol) in dichloromethane (25 mL) at 0.degree. C. was
added formaldehyde (0.435 mL, 37% water solution, 5.78 mmol)
followed by sodium triacetoxyborohydride (1050 mg, 4.96 mmol). The
reaction mixture was allowed to warm to room temperature and
stirred for 2 h before being diluted with dichloromethane and
washed with 1N NaOH solution. The organics were washed with brine,
dried (MgSO.sub.4) and evaporated to yield
(2R,5R)-2-ethyl-1,5-dimethyl-4-(phenylmethyl)piperazine (875 mg,
91%). LCMS: (M+H).sup.+: 233.3.
Part B
(2R,5R)-2-Ethyl-1,5-dimethylpiperazine, hydrochloride salt
[1236] (2R,5R)-2-Ethyl-1,5-dimethyl-4-(phenylmethyl)piperazine (873
mg, 3.76 mmol) was dissolved in 50 mL of MeOH, degassed and placed
under argon. 10% Pd/C (175 mg) was added, and the contents were
thoroughly degassed and placed under a hydrogen balloon for
approximately 3 hrs. The contents were then degassed and filtered
through Celite, and the Celite pad was washed with DCM and MeOH.
After 7.9 mL 1N HCl was added, the resulting filtrate was
concentrated in vacuo to provide the hydrochloride salt of
(2R,5R)-2-ethyl-1,5-dimethylpiperazine (800 mg, 100%). LCMS:
(M+H).sup.+: 143.1.
Part C
N-[(2R)-3-(2-{2-Chloro-6-[(2R,5R)-5-ethyl-2,4-dimethyl-1-piperazinyl]-5-fl-
uoro-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]-N-hydroxyformamide
[1237]
N-[(2R)-3-(2-{2-Chloro-6-[(2R,5R)-5-ethyl-2,4-dimethyl-1-piperaziny-
l]-5-fluoro-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-N--
hydroxyformamide was prepared according to General Procedure G,
utilizing (2R,5R)-2-ethyl-1,5-dimethylpiperazine, hydrochloride
salt in place of (1S,4S)-2-methyl-2,5-diazabicyclo[2.2.1]heptane,
dihydrobromide in Part A. LCMS: (M+H).sup.+: 500.3.
Example 262
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R,5R)-5-ethyl-2,4-dimethyl-1-pipe-
razinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N-hydroxy-
formamide
##STR00284##
[1239]
N-[(2R)-2-(Cyclopentylmethyl)-3-(2-{6-[(2R,5R)-5-ethyl-2,4-dimethyl-
-1-piperazinyl]-5-fluoro-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]-N--
hydroxyformamide was prepared according to General Procedure A,
utilizing (2R,5R)-2-ethyl-1,5-dimethylpiperazine, hydrochloride
salt (Example 261) in place of pyrrolidine in Part A, and using 3
equivalents of DIPEA. LCMS: (M+H).sup.+: 480.1.
Example 263
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(3-methyl-1-azetidin-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00285##
[1241]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(3-methyl-1-a-
zetidinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
was prepared in a manner similar to Example 182, utilizing
3-methylazetidine hydrochloride (Journal of Heterocyclic Chemistry,
1971, 8, 961-6), in place of 1-(3-methyl-3-azetidinyl)pyrrolidine
dihydrochloride in Part A. LCMS: (M+H).sup.+409.1.
Example 264
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(1-piperidinylmethyl)-1-pyrrolidin-
yl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyform-
amide
##STR00286##
[1242] Part A
(2S)-1-(Phenylmethyl)-2-(1-pyrrolidinylcarbonyl)pyrrolidine
[1243] 1-(Phenylmethyl)-L-proline hydrochloride (2.0 g, 8.247 mmol)
and HOBt (1.34 g, 9.928 mmol) were dissolved in CH.sub.2Cl.sub.2
(50 mL), and 4-methylmorpholine (2.72 mL, 24.822 mmol), piperidine
(0.981 mL, 9.929 mmol), and EDCl (1.906 g, 9.928 mmol) were added
to this solution. After stirring overnight, the solution was washed
with water (50 mL), and the aqueous layer was extracted with
CH.sub.2Cl.sub.2 (3.times.50 mL). The combined organic layers were
dried over anhydrous MgSO.sub.4 and concentrated in vacuo to
provide (2S)-1-(phenylmethyl)-2-(1-pyrrolidinylcarbonyl)piperidine
(0.901 g, 40%). LCMS: (M+H).sup.+: 273.1.
Part B
1-{[(2S)-1-(Phenylmethyl)-2-pyrrolidinyl]methyl}piperidine
[1244] (2S)-1-(Phenylmethyl)-2-(1-pyrrolidinylcarbonyl)piperidine
(901 mg, 3.307 mmol) was dissolved in 20 mL of THF, cooled to
0.degree. C., and then LiAlH.sub.4 (251 mg, 6.615 mmol) was added
portion wise. The mixture was heated to 80.degree. C. for 2 h, then
allowed to cool to RT. The reaction was quenched in succession with
H.sub.2O (0.300 mL), 15% aq. NaOH (0.300 mL) and H.sub.2O (0.900
mL) and was stirred at room temperature overnight. The contents
were filtered, and the filtrate was concentrated in vacuo to
provide 1-{[(2S)-1-(phenylmethyl)-2-pyrrolidinyl]methyl}piperidine
(710 mg, 83%).
Part C
1-[(2S)-2-Pyrrolidinylmethyl]piperidine hydrochloride
[1245] 1-{[(2S)-1-(Phenylmethyl)-2-pyrrolidinyl]methyl}piperidine
(710 mg, 2.747 mmol) was dissolved in a mixture of MeOH (20 mL) and
1N HCl (6 mL, 6.044 mmol), degassed and placed under argon. 10%
Pd/C (213 mg) was added, and the contents were thoroughly degassed
and placed under a hydrogen balloon for 2 h. The contents were then
degassed, and the Pd/C was removed by filtration through a
fiberglass filter, washing with MeOH. The filtrate was concentrated
in vacuo to provide pure 1-[(2S)-2-pyrrolidinylmethyl]piperidine
hydrochloride (692 mg, >99%). LCMS: (M+H).sup.+: 169.2.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(1-piperidinyl
methyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3--
oxopropyl]hydroxyformamide
[1246]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(1-piperidinylmethyl)-1-pyr-
rolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydr-
oxyformamide was prepared according to General Procedure E,
utilizing 1-[(2S)-2-pyrrolidinylmethyl]piperidine hydrochloride in
place of isopropyl amine in Part A. LCMS: (M+H).sup.+: 581.4.
Example 265
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(2-methyl-1-azetidin-
yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide (Mixture
of Diastereomers)
##STR00287##
[1248]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(2-methyl-1-a-
zetidinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
was prepared as a mixture of diastereomers in a manner similar to
Example 182, utilizing 2-methylazetidine hydrochloride (J. Org.
Chem. 1961, 26, 138-144) in place of
1-(3-methyl-3-azetidinyl)pyrrolidine dihydrochloride in Part A.
LCMS: (M+H).sup.+409.2.
Example 266
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-methyl-1-azetidinyl)-4-pyrimidinyl]hydr-
azino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide (Mixture
of Diastereomers)
##STR00288##
[1250]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-(2-methyl-1-azetidinyl)-4-pyrimidin-
yl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared as a mixture of diastereomers according to General
Procedure D, utilizing 2-methylazetidine hydrochloride (J. Org.
Chem. 1961, 26, 138-144) in place of N-methylpiperazine in Part A.
LCMS: (M+H).sup.+429.1.
Example 267
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(dimethylamino)methyl]-1-piperidinyl}-5-fl-
uoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfor-
mamide
##STR00289##
[1251] Part A
Phenylmethyl
(2S)-2-[(dimethylamino)carbonyl]-1-piperidinecarboxylate
[1252] (2S)-1-{[(Phenylmethyl)oxy]carbonyl}-2-piperidinecarboxylic
acid (2.0 g, 7.595 mmol) and HOBt (1.231 g, 9.114 mmol) were
dissolved in CH.sub.2Cl.sub.2 (40 mL), and 4-methylmorpholine (2.5
mL, 22.78 mmol), 2.0 M solution of dimethyl amine in THF (4.55 mL,
9.114 mmol), and EDCl (1.750 g, 9.114 mmol) were added. This
solution was stirred overnight, and was then washed with 1 N HCl
(25 mL) and the aqueous layer was extracted with CH.sub.2Cl.sub.2
(3.times.25 mL). The combined organic layers were dried over
anhydrous MgSO.sub.4 and concentrated in vacuo. This crude product
was purified by flash chromatography (Combiflash, 0-100% ethyl
acetate/hexanes) to provide phenylmethyl
(2S)-2-[(dimethylamino)carbonyl]-1-piperidinecarboxylate (1.919 g,
87%). LCMS: (M+H).sup.+: 291.1.
Part B
(2S)--N,N-Dimethyl-2-piperidinecarboxamide hydrochloride
[1253] Phenylmethyl
(2S)-2-[(dimethylamino)carbonyl]-1-piperidinecarboxylate (1.918 g,
6.609 mmol) was dissolved in a mixture of MeOH (40 mL) and 1N HCl
(14.53 mL, 14.53 mmol), degassed and placed under argon. 10% Pd/C
(575 mg) was added, and the contents were thoroughly degassed and
placed under a hydrogen balloon for 2 h. The contents were then
degassed, and the Pd/C was removed by filtration through a
fiberglass filter, washing with MeOH. The filtrate was concentrated
in vacuo to provide pure (2S)--N,N-dimethyl-2-piperidinecarboxamide
hydrochloride (1.483 g, >99%). LCMS: (M+H).sup.+: 157.2.
Part C
(2S)--N,N-Dimethyl-1-(phenylcarbonyl)-2-piperidinecarboxamide
[1254] (2S)--N,N-Dimethyl-2-piperidinecarboxamide hydrochloride
(880 mg, 4.567 mmol) was dissolved in a mixture of CH.sub.2Cl.sub.2
(15 mL) and water (15 mL), and then solid sodium bicarbonate (1.534
g, 18.268 mmol) was added, followed by benzoyl chloride (0.556 mL,
4.795 mmol). After stirring overnight, the phases were separated,
and the aqueous phase was extracted with CH.sub.2Cl.sub.2
(3.times.50 mL). The combined organic phase was dried over
anhydrous MgSO.sub.4, filtered, and concentrated in vacuo. This
crude product was purified by flash chromatography (Combiflash,
0-10% methanol/dichloromethane) to provide
(2S)--N,N-dimethyl-1-(phenylcarbonyl)-2-piperidinecarboxamide (883
mg, 74%). LCMS: (M+H).sup.+: not detected.
Part D
N,N-Dimethyl-1-[(2S)-1-(phenylmethyl)-2-piperidinyl]methanamine
[1255]
(2S)--N,N-Dimethyl-1-(phenylcarbonyl)-2-piperidinecarboxamide (883
mg, 3.396 mmol) was dissolved in 20 mL of THF, cooled to 0.degree.
C., and then LiAlH.sub.4 (1.386 mg, 36.54 mmol) was added portion
wise. The mixture was heated to 80.degree. C. for 2 h, then allowed
to cool to RT. The reaction was quenched in succession with
H.sub.2O (1.0 mL), 15% aq. NaOH (1.0 mL) and H.sub.2O (3.0 mL), and
was stirred at room temperature overnight. The contents were
filtered, and the filtrate was concentrated in vacuo to provide
N,N-dimethyl-1-[(2S)-1-(phenylmethyl)-2-piperidinyl]methanamine
(590 mg, 75%). LCMS: (M+H).sup.+: 233.1.
Part E
N,N-Dimethyl-1-[(2S)-2-piperidinyl]methanamine hydrochloride
[1256]
N,N-Dimethyl-1-[(2S)-1-(phenylmethyl)-2-piperidinyl]methanamine
(590 mg, 2.539 mmol) was dissolved in a mixture of MeOH (20 mL) and
1N HCl (5.5 mL, 5.5 mmol), degassed and placed under argon. 10%
Pd/C (117 mg) was added, and the contents were thoroughly degassed
and placed under a hydrogen balloon for 2 h. The contents were then
degassed, and the Pd/C was removed by filtration through a
fiberglass filter, washing with MeOH. The filtrate was concentrated
in vacuo to provide pure
N,N-dimethyl-1-[(2S)-2-piperidinyl]methanamine hydrochloride (425
mg, 78%). LCMS: (M+H).sup.+: not detected.
Part F
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(dimethylamino)methyl]-1-piperidinyl}-5-fl-
uoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyfor-
mamide
[1257]
[(2R)-3-[2-(2-Chloro-6-{(2S)-2-[(dimethylamino)methyl]-1-piperidiny-
l}-5-fluoro-4-pyrimidinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide was prepared according to General Procedure E,
utilizing N,N-dimethyl-1-[(2S)-2-piperidinyl]methanamine
hydrochloride in place of isopropyl amine in Part A. LCMS:
(M+H).sup.+: 501.1.
Example 268
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-phenyl-1-pyrrolidinyl]-4-pyrimidin-
yl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00290##
[1259]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-phenyl-1-pyrrolidinyl]-4-py-
rimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure E, utilizing
(S)-nornicotine (J. Org. Chem. 2001, 66, 6305-6312) in place of
isopropyl amine in Part A, and 2.0 M HCl in ether with DCM as a
solvent in Part B. LCMS: (M+H).sup.+: 506.2/508.2.
Example 269
[(2R)-3-{2-[2-Chloro-5-fluoro-6-((2S)-2-{[methyl(1-methylethyl)amino]methy-
l}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopro-
pyl]hydroxyformamide
##STR00291##
[1261]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-((2S)-2-{[methyl(1-methylethyl)amin-
o]methyl}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-
-oxopropyl]hydroxyformamide was prepared in a manner similar to
Example 264, utilizing commercially-available
methyl(1-methylethyl)amine in place of piperidine in Part A. LCMS:
(M+H).sup.+: 514.3.
Example 270
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-64(2S)-2-{[methyl(1-me-
thylethyl)amino]methyl}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-3-oxoprop-
yl)hydroxyformamide
##STR00292##
[1263]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(6-{(2S)-2-[(dimethylamino)methyl]-
-1-pyrrolidinyl}-5-fluoro-2-methyl-4-pyrimidinyl)hydrazino]-3-oxopropyl}hy-
droxyformamide was prepared in a manner similar to Example 243,
utilizing commercially-available methyl(1-methylethyl)amine in
place of morpholine in Part A. LCMS: (M+H).sup.+: 494.2.
Example 271
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-((2S)-2-{[methyl(pro-
pyl)amino]methyl}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hyd-
roxyformamide
##STR00293##
[1265]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-((2S)-2-{[met-
hyl(propyl)amino]methyl}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-3-oxopro-
pyl)hydroxyformamide was prepared in a manner similar to Example
243, utilizing commercially-available N-methyl-1-propanamine in
place of morpholine in Part A. LCMS: (M+H).sup.+: 494.4.
Example 272
[(2R)-3-{2-[2-Chloro-5-fluoro-6-((2S)-2-{[methyl(propyl)amino]methyl}-1-py-
rrolidinyl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopropyl]hyd-
roxyformamide
##STR00294##
[1267]
[(2R)-3-{2-[2-Chloro-5-fluoro-6-((2S)-2-{[methyl(propyl)amino]methy-
l}-1-pyrrolidinyl)-4-pyrimidinyl]hydrazino}-2-(cyclopentylmethyl)-3-oxopro-
pyl]hydroxyformamide was prepared in a manner similar to Example
264, utilizing commercially-available N-methyl-1-propanamine in
place of piperidine in Part A. LCMS: (M+H).sup.+: 514.3.
Example 273
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-yl-
methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]h-
ydroxyformamide
##STR00295##
[1268] Part A
4-Methyl-N-(1,3-thiazol-2-ylmethyl)-1-piperazinamine
[1269] Commercially available 1,3-thiazole-2-carbaldehyde (0.388
mL, 4.42 mmol) and commercially available 4-methyl-1-piperazinamine
(0.532 mL, 4.42 mmol) were dissolved in MeOH (20 mL) and cooled to
0.degree. C. Then methyl orange indicator and enough 4M HCl in
dioxane was added to keep the reaction mixture acidic and a light
pinkish color. Then sodium cyanoborohydride (0.555 g, 8.84 mmol)
was added and the reaction was left to stir. The reaction mixture
was evaporated to provide crude
4-methyl-N-(1,3-thiazol-2-ylmethyl)-1-piperazinamine as a
beige-yellow solid (2.2168 g). LCMS: (M+H).sup.+=213.0.
Part B
Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-ylmethyl)a-
mino]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate
[1270] 4-Methyl-N-(1,3-thiazol-2-ylmethyl)-1-piperazinamine (2.2169
g, 10.44 mmol) was dissolved in THF (30 mL) and triethylamine (4.37
ml, 31.3 mmol). Then tris(1,1-dimethylethyl)
2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)-1,1,2-hydrazinetricarboxylate
(3.89 g, 7.83 mmol) and DMSO (5 mL) were added. The reaction was
left to stir overnight. The THF was evaporated away, and the
mixture was diluted with water. The aqueous layer was extracted
with ethyl acetate, and the organics were dried (Na.sub.2SO.sub.4)
and evaporated. Purification by silica gel chromatography and
RP-HPLC provided tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-ylmethyl)a-
mino]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (0.2014 g, 3%).
LCMS: (M+H).sup.+=674.6.
Part C
2-Chloro-5-fluoro-6-hydrazino-N-(4-methyl-1-piperazinyl)-N-(1,3-thiazol-2--
ylmethyl)-4-pyrimidinamine
[1271] Tris(1,1-dimethylethyl)
2-{2-chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-ylmethyl)a-
mino]-4-pyrimidinyl}-1,1,2-hydrazinetricarboxylate (0.2014 g, 0.299
mmol) was dissolved in DCM (20 mL) under a nitrogen atmosphere.
Then 2M HCl (2.99 mL, 5.98 mmol) was added, and the reaction was
stirred overnight. The reaction mixture was evaporated to provide
crude
2-chloro-5-fluoro-6-hydrazino-N-(4-methyl-1-piperazinyl)-N-(1,3-thiazol-2-
-ylmethyl)-4-pyrimidinamine as a yellow solid (0.1683 g). LCMS:
(M+H).sup.+=373.0.
Part D
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-yl-
methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl](-
tetrahydro-2H-pyran-2-yloxy)formamide
[1272]
(2R)-4-Ethyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}he-
ptanoic acid (0.3764 g, 1.257 mmol),
2-chloro-5-fluoro-6-hydrazino-N-(4-methyl-1-piperazinyl)-N-(1,3-thiazol-2-
-ylmethyl)-4-pyrimidinamine (0.1683 g), NMM (0.298 mL, 2.71 mmol),
HOAt (0.074 g, 0.542 mmol), and EDC (0.104 g, 0.542 mmol) were
dissolved in DMF (10 mL). The reaction was left to stir overnight.
Purification by RP-HPLC provided
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-y-
lmethyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
(tetrahydro-2H-pyran-2-yloxy)formamide as a brown oily solid
(0.1688 g). LCMS: (M+H).sup.+=655.4.
Part E
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-yl-
methyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl
methyl)-3-oxopropyl]hydroxyformamide
[1273]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiaz-
ol-2-ylmethyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxop-
ropyl](tetrahydro-2H-pyran-2-yloxy)formamide (0.1688 g, 0.258 mmol)
was taken up in water (2 mL) and acetic acid (8 mL). The reaction
was left to stir overnight. Purification by RP-HPLC provided
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(4-methyl-1-piperazinyl)(1,3-thiazol-2-y-
lmethyl)amino]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-3-oxopropyl]-
hydroxyformamide as a beige solid (0.0483 g, 25%). LCMS:
(M+H).sup.+=571.2.
Example 274
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimidi-
n-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethy-
l)-3-oxopropyl]hydroxyformamide
##STR00296##
[1274] Part A
1,1-Dimethylethyl
(2S)-2-({[2-chloro-5-(dihydroxyamino)-4-pyrimidinyl]amino}methyl)-1-pyrro-
lidinecarboxylate
[1275] 2,4-Dichloro-5-(dihydroxyamino)pyrimidine (2.5 g, 12.75
mmol), 1,1-dimethylethyl
(2S)-2-(aminomethyl)-1-pyrrolidinecarboxylate (1.277 g, 6.38 mmol),
and DIEA (1.114 mL, 6.38 mmol) were dissolved in DCM (75 mL). The
mixture was stirred for 1 h, and when the reaction was complete as
determined by LCMS, the solution was concentrated in vacuo. This
crude product was purified by flash chromatography (Combiflash,
0-100% ethyl acetate/hexanes) to provide 1,1-dimethylethyl
(2S)-2-({[2-chloro-5-(dihydroxyamino)-4-pyrimidinyl]amino}methyl)-1-pyrro-
lidinecarboxylate (1.6362 g, 71%). LCMS: (M+H).sup.+: 357.8.
Part B
1,1-Dimethylethyl
(2S)-2-{[(5-amino-4-pyrimidinyl)amino]methyl}-1-pyrrolidinecarboxylate
[1276] 1,1-Dimethylethyl
(2S)-2-({[2-chloro-5-(dihydroxyamino)-4-pyrimidinyl]amino}methyl)-1-pyrro-
lidinecarboxylate (2.064 g, 5.74 mmol) was dissolved in MeOH (40
mL), degassed and placed under argon. 10% Pd/C (619 mg) was added,
and the contents were thoroughly degassed and placed under a
hydrogen balloon for 2 h. The contents were then degassed, and the
Pd/C was removed by filtration through a fiberglass filter, washing
with MeOH. The filtrate was concentrated in vacuo to provide pure
1,1-dimethylethyl
(2S)-2-{[(5-amino-4-pyrimidinyl)amino]methyl}-1-pyrrolidinecarboxylate
(1.589 g, 94%). LCMS: (M+H).sup.+: 294.1.
Part C
1,1-Dimethylethyl
(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-1-pyrrolidinecarbo-
xylate
[1277] 1,1-Dimethylethyl
(2S)-2-{[(5-amino-4-pyrimidinyl)amino]methyl}-1-pyrrolidinecarboxylate
(1.6633 g, 5.67 mmol) and sodium nitrite (469 mg, 6.80 mmol) were
dissolved in a mixture of acetic acid (5 mL) and water (8 mL), and
the mixture was stirred vigorously for 1 h. The solution was
concentrated in vacuo to provide 1,1-dimethylethyl
(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-1-pyrrolidinecarbo-
xylate (1.98 g, >99%). LCMS: (M+H).sup.+: 305.2.
Part D
3-[(2S)-2-Pyrrolidinylmethyl]-3H-[1,2,3]triazolo[4,5-d]pyrimidine
[1278] 1,1-Dimethylethyl
(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-1-pyrrolidinecarbo-
xylate (1.98 g, 6.54 mmol) was dissolved in a mixture of
CH.sub.2Cl.sub.2 (10 mL) and TFA (2.5 mL) and allowed to stir at
room temperature overnight. When the reaction was complete as
determined by LCMS, the solution was concentrated in vacuo, and the
residue was dissolved in CH.sub.2Cl.sub.2 (5 mL) and washed with 1
N aq. NaOH (30 mL). The aqueous layer was extracted with
CH.sub.2Cl.sub.2 (3.times.20 mL). The combined organic layers were
dried over anhydrous MgSO.sub.4 and concentrated in vacuo to
provide
3-[(2S)-2-pyrrolidinylmethyl]-3H-[1,2,3]triazolo[4,5-d]pyrimidine
(758 mg, 57%). LCMS: (M+H).sup.+: 205.1.
Part E
2,4-Dichloro-5-fluoro-6-hydrazinopyrimidine
[1279] To hydrazine monohydrate (289 .mu.L, 5.96 mmol) and
triethylamine (830 .mu.L, 5.96 mmol) in MeOH (15 mL) was added a
solution of 2,4,6-trichloro-5-fluoropyrimidine (1.0 g, 4.96 mmol)
in MeOH (15 mL), and the mixture was stirred overnight. When the
reaction was complete as determined by LCMS, the solution was
concentrated in vacuo, and the resulting crude product was purified
by RP-HPLC to provide 2,4-dichloro-5-fluoro-6-hydrazinopyrimidine
(358 mg, 32%). LCMS: (M+H).sup.+: 196.9.
Part F
{(2R)-2-(Cyclopentylmethyl)-3-[2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)hydr-
azino]-3-oxopropyl}[(phenylmethyl)oxy]formamide
[1280] 2,4-Dichloro-5-fluoro-6-hydrazinopyrimidine (358 mg 1.817
mmol),
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid (746 mg, 1.508 mmol), and HOAt (247 mg, 1.817 mmol) were
dissolved in 15 mL of DMF. NMM (0.798 mL, 7.27 mmol) was added,
followed by EDC (348 mg, 1.817 mmol). After stirring overnight at
room temperature, the reaction mixture was purified by RP-HPLC to
provide
{(2R)-2-(cyclopentylmethyl)-3-[2-(2,6-dichloro-5-fluoro-4-pyrimidinyl)hyd-
razino]-3-oxopropyl}[(phenylmethyl)oxy]formamide (442 mg, 50%).
LCMS: (M+H).sup.+: 483.6.
Part G
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimidi-
n-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethy-
l)-3-oxopropyl][(phenylmethyl)oxy]formamide
[1281]
{(2R)-2-(Cyclopentylmethyl)-3-[2-(2,6-dichloro-5-fluoro-4-pyrimidin-
yl)hydrazino]-3-oxopropyl}[(phenylmethyl)oxy]formamide (136 mg,
0.278 mmol) and
3-[(2S)-2-pyrrolidinylmethyl]-3H-[1,2,3]triazolo[4,5-d]pyrimidi- ne
(63 mg, 0.308 mmol) were dissolved in DMSO (5 mL), then DIEA (59
.mu.L, 0.308 mmol) was added, and the solution was heated at
65.degree. C. overnight. When the reaction was complete as
determined by LCMS, the solution was concentrated in vacuo, and the
resulting crude product was purified by RP-HPLC to provide
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimid-
in-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmeth-
yl)-3-oxopropyl][(phenylmethyl)oxy]formamide (43 mg, 21%). LCMS:
(M+H).sup.+: 651.6.
Part H
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimidi-
n-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethy-
l)-3-oxopropyl]hydroxyformamide
[1282]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-d]p-
yrimidin-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopent-
ylmethyl)-3-oxopropyl]hydroxyformamide was prepared according to
General Procedure E, Part D, utilizing
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-d]pyrimid-
in-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmeth-
yl)-3-oxopropyl][(phenylmethyl)oxy]formamide in place of
[(2R)-3-(2-{2-chloro-5-fluoro-6-[(1-methylethyl)amino]-4-pyrimidinyl}hydr-
azino)-2-(cyclopentylmethyl)-3-oxopropyl][(phenylmethyl)oxy]formamide
in Part D. LCMS: (M+H).sup.+: 562.2.
Example 275
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-diazas-
piro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyformamide
##STR00297##
[1284]
((2R)-2-(Cyclopentylmethyl)-3-{2-[5-fluoro-2-methyl-6-(4-methyl-4,7-
-diazaspiro[2.5]oct-7-yl)-4-pyrimidinyl]hydrazino}-3-oxopropyl)hydroxyform-
amide was prepared in a manner similar to Example 210, Part E and
Part F, utilizing 4-methyl-4,7-diazaspiro[2.5]octane
dihydrochloride (Example 172) in place of
1-{1-[(2S)-2-pyrrolidinyl]cyclopropyl}pyrrolidine hydrochloride in
Part E. LCMS: (M+H).sup.+: 463.8.
Example 276
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclobutylmethyl)-3-oxopropyl]hydroxyformamide
##STR00298##
[1285] Part A
(2R)-3-Cyclobutyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid
[1286]
(2R)-3-Cyclobutyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propano-
ic acid can be prepared in a manner similar to Intermediate A,
utilizing bromomethyl cyclobutane in place of
3-cyclopentylpropionyl chloride in Part A.
Part B
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-pyrimi-
dinyl}hydrazino)-2-(cyclobutyl
methyl)-3-oxopropyl]hydroxyformamide
[1287]
[(2R)-3-(2-{2-Chloro-6-[(2R)-2,4-dimethyl-1-piperazinyl]-5-fluoro-4-
-pyrimidinyl}hydrazino)-2-(cyclobutylmethyl)-3-oxopropyl]hydroxyformamide
was prepared in a manner similar to Example 63, utilizing
(2R)-3-cyclobutyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in place of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in Part F. LCMS: (M+H).sup.+: 457.6.
Example 277
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4]oxazin-
-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclobutylmethyl)-3-oxopropyl]hydro-
xyformamide
##STR00299##
[1289]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4-
]oxazin-8(1H)-yl]-4-pyrimidinyl}hydrazino)-2-(cyclobutylmethyl)-3-oxopropy-
l]hydroxyformamide was prepared in a manner similar to Example 64,
utilizing
(2R)-3-cyclobutyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)pro-
panoic acid (Example 281) in place of
(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoic
acid in Part F. LCMS: (M+H).sup.+: 465.8.
Example 278
Methyl((3S)-1-{2-chloro-6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]-
methyl}propanoyl)hydrazino]-5-fluoro-4-pyrimidinyl}-3-pyrrolidinyl)carbama-
te
##STR00300##
[1290] Part A
Phenyl methyl
(3S)-3-{[(methyloxy)carbonyl]amino}-1-pyrrolidinecarboxylate
[1291] Sodium bicarbonate (2.073 g, 24.68 mmol) was dissolved in a
mixture of water (20.00 mL) and DCM (20 mL), and phenylmethyl
(3S)-3-amino-1-pyrrolidinecarboxylate (2.88 g, 11.22 mmol) was
added followed by methylchloroformate (0.953 mL, 12.34 mmol). This
mixture was stirred for 6 h. The biphasic mixture was then
separated, and the aqueous phase was extracted once with DCM. The
combined organics were dried over sodium sulfate, filtered and
evaporated. The residual material was then purified via silica gel
chromatography (0-100% EtoAc in hexane) yielding phenylmethyl
(3S)-3-{[(methyloxy)carbonyl]amino}-1-pyrrolidinecarboxylate (2 g,
64%) as a clear oil. LCMS: (M+H).sup.+: 278.9.
Part B
Methyl (3S)-3-pyrrolidinylcarbamate
[1292] Phenylmethyl
(3S)-3-{[(methyloxy)carbonyl]amino}-1-pyrrolidinecarboxylate (2.00
g, 7.19 mmol) was dissolved in degassed methanol (20 mL) and Pd/C
(0.4 g, 0.376 mmol) was added. The reaction vessel was evacuated
and back-filled with hydrogen via a balloon. The reaction was
stirred for 2 h after which time the catalyst was removed by
filtration through Celite. Evaporation of the solvent yielded
methyl (3S)-3-pyrrolidinylcarbamate (0.99 g, 76%) as a clear
oil.
Part C
Methyl((3S)-1-{2-chloro-6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy)amino]-
methyl}propanoyl)hydrazino]-5-fluoro-4-pyrimidinyl}-3-pyrrolidinyl)carbama-
te
[1293]
Methyl((3S)-1-{2-chloro-6-[2-((2R)-3-cyclopentyl-2-{[formyl(hydroxy-
)amino]methyl}propanoyl)hydrazino]-5-fluoro-4-pyrimidinyl}-3-pyrrolidinyl)-
carbamate was prepared according to General Procedure E, utilizing
methyl (3S)-3-pyrrolidinylcarbamate in place of isopropyl amine in
Part A, and 2.0 M HCl in ether with DCM as a solvent in part B.
LCMS: (M+H).sup.+: 502.2/504.1.
Example 279
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-b]pyridin--
3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-
-3-oxopropyl]hydroxyformamide
##STR00301##
[1294] Part A
3-[(2S)-2-Pyrrolidinylmethyl]-3H-[1,2,3]triazolo[4,5-b]pyridine
[1295]
3-[(2S)-2-Pyrrolidinylmethyl]-3H-[1,2,3]triazolo[4,5-b]pyridine was
prepared in a manner similar to Example 279, Part A through Part D,
utilizing commercially-available
2-chloro-3-(dihydroxyamino)pyridine in place of
2,4-dichloro-5-(dihydroxyamino)pyrimidine in Part A. LCMS:
(M+H).sup.+: 204.1.
Part B
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-b]pyridin--
3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentylmethyl)-
-3-oxopropyl]hydroxyformamide
[1296]
[(2R)-3-(2-{2-Chloro-5-fluoro-6-[(2S)-2-(3H-[1,2,3]triazolo[4,5-b]p-
yridin-3-ylmethyl)-1-pyrrolidinyl]-4-pyrimidinyl}hydrazino)-2-(cyclopentyl-
methyl)-3-oxopropyl]hydroxyformamide was prepared according to
General Procedure E, utilizing
3-[(2S)-2-pyrrolidinylmethyl]-3H-[1,2,3]triazolo[4,5-b]pyridine in
place of isopropyl amine in Part A. LCMS: (M+H).sup.+: 561.2.
Example 280
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(2-furanyl)ethyl]amino}-4-pyrimidinyl)-
hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
##STR00302##
[1298]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(2-furanyl)ethyl]amino}-4-pyrim-
idinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure E, utilizing
[2-(2-furanyl)ethyl]amine (WO9611210, 1996) in place of isopropyl
amine in Part A, and 2.0 M HCl in ether with DCM as a solvent in
Part B. LCMS: (M+H).sup.+: 469.2/471.1.
Example 281
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(3-furanyl)ethyl]amino}-4-pyrimidinyl)-
hydrazino]-2-(cyclopentyl methyl)-3-oxopropyl]hydroxyformamide
##STR00303##
[1300]
[(2R)-3-[2-(2-Chloro-5-fluoro-6-{[2-(3-furanyl)ethyl]amino}-4-pyrim-
idinyl)hydrazino]-2-(cyclopentylmethyl)-3-oxopropyl]hydroxyformamide
was prepared according to General Procedure E, utilizing
[2-(3-furanyl)ethyl]amine (WO9611210, 1996) in place of isopropyl
amine in Part A, and 2.0 M HCl in ether with DCM as a solvent in
Part B. LCMS: (M+H).sup.+: 469.2/471.1.
Polymorph Examples
Example 1P
Polymorphic Form 1 of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide
[1301] Form 1 was prepared by following the general procedure of
Example 24, Part L, alternative procedure.
Alternative Procedure
[1302] Ethyl Acetate (0.5 mL) was added to crystalline
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide (Form 1, 30.8 mg). The resulting slurry was
temperature-cycled from 0-40.degree. C. 16 times over 48 hours. The
solid in the slurry was the ethyl acetate solvate at this point.
The resulting solids and supernatant were separated by filtration
at room temperature. The solids were vacuum dried under ambient
laboratory conditions for one hour, which desolvates the solvate to
Form 1.
Example 2P
Polymorphic Form 2 of [(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-
-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1303] 5.3 mg of
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide (Form 1) was slurried in 500 uL of water. The sample
was mildly heated with a heat gun to increase solubility, but solid
never completely dissolved. The solids were vacuum dried under
ambient laboratory conditions and the resulting solid was
analytically characterized and found to be Form 2.
Alternative Procedure
[1304] A reactor was charged with
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide (Form 1, 1.0 eq) and water (20 vol). The suspension
was stirred at T=20.degree. C. over 60 hours. The suspension was
filtered and washed twice with 2.5 vol water. The material was
dried under reduced pressure at T=60.degree. C. and it was milled
(Quadro Comil, stainless steel, mesh size: 1 mm).
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide Form 2 was obtained as a white solid.
Example 3P
Polymorphic Form 3 of [(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-
-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1305] 1-propanol (0.5 mL) was added to crystalline
[(2R)-2-(Cyclopentylmethyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-
-c][1,4]oxazin-8(1H)-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hyd-
roxyformamide (Form 1, 30.8 mg). The resulting slurry was
temperature-cycled from 0-40.degree. C. 16 times over .about.48
hours. The resulting solids and supernatant were separated by
filtration at room temperature. The solids were vacuum dried under
ambient laboratory conditions for one hour. The resulting solid was
analytically characterized and found to be Form 3.
Analysis of Polymorphic Forms of [(2R)-2-(Cyclopentyl
methyl)-3-(2-{5-fluoro-6-[(9aS)-hexahydropyrazino[2,1-c][1,4]oxazin-8(1H)-
-yl]-2-methyl-4-pyrimidinyl}hydrazino)-3-oxopropyl]hydroxyformamide
[1306] Form 1 and Form 2 were analyzed by FT-IR, FT-Raman, XRPD,
DSC, and TGA. Form 3 was analyzed by FT-Raman, XRPD, DSC, and TGA.
Samples used for analyses were prepared by methods standard in the
art and under ambient conditions. Generally 1-5 mg of dry Form 1,
Form 2, or Form 3 was placed on the instrument/sample holder. The
following instruments and parameters were used.
FT-IR
Instrument: Thermo Magna MidIR System
Key Operating Parameters:
[1307] Number of sample scans: 64 [1308] Resolution: 4.000
cm.sup.-1 [1309] Levels of zero filling: 2 [1310] Apodization:
Happ-Genzel [1311] Phase correction: Mertz [1312] Number of
background scans: 64 [1313] Detector: DTGS [1314] Beamsplitter: KBr
[1315] Sampling Accessory Thermo Smart DuraScope ATR, diamond ATR
element
FT-Raman
Instrument: Thermo FT-Raman System 960 Spectrometer
Key Operating Parameters:
[1315] [1316] Detector: Liquid Nitrogen-Cooled Germanium [1317]
Beamsplitter: CaF2 [1318] Sample scans: 64 [1319] Resolution: 4.0
cm.sup.-1 [1320] Levels of zero filling: 2 [1321] Apodization:
Happ-Genzel [1322] Phase Correction Power spectrum [1323] Raman
laser frequency: 9393.6416 cm.sup.-1
XRPD
Instrument: Bruker AXS PXRD General Area Detector Diffraction
System
Key Operating Parameters:
[1323] [1324] Scan range: 3-42 degrees two-theta [1325] Generator
power: 40 kV, 40 mA [1326] Radiation Source Cu Ka [1327] Scan type:
Coupled scan [1328] Number of frames: 3 frames [1329] Time per
frame: 5 min [1330] Sample Oscillation: 0.1-0.5 mm oscillation
depending on sample size [1331] Detector Distance: 25 cm [1332]
Filter/monochrometer: Single Goebel Mirror [1333] Detector Type
General Area Detector Diffraction
Thermal Analysis
Instrument: TA Instruments Thermal Analysis System, Model DSC
Q100
Key Operating Parameters:
[1333] [1334] Module--DSC Standard Cell FC [1335] Method--Ramp
[1336] Pan: Closed aluminum [1337] Purge gas: N2, 40 mL/min [1338]
Cell #FC-00615 [1339] Method 1: Equilibrate at 30.00.degree. C.
[1340] 2: Ramp 15.00.degree. C./min to 350.00.degree. C.
Instrument: TA Instruments Thermal Analysis System, Model TGA
Q500
Key Operating Parameters:
[1340] [1341] Method--Ramp [1342] Purge gas: N2, 40 mL/min [1343]
Balance gas: N2, 40 mL/min [1344] Method 1: Ramp 15.00.degree.
C./min to 300.00.degree. C.
* * * * *