U.S. patent application number 11/942387 was filed with the patent office on 2008-06-05 for non-peptidic npy y2 receptor inhibitors.
Invention is credited to Nicholas I. Carruthers, Wenying Chai, Scott L. Dax, Jill A. Jablonowski, Xiaobing Li, Timothy W. Lovenberg, William V. Murray, Dale A. Rudolph, Mark Seierstad, Mark A. Youngman.
Application Number | 20080132540 11/942387 |
Document ID | / |
Family ID | 34393019 |
Filed Date | 2008-06-05 |
United States Patent
Application |
20080132540 |
Kind Code |
A1 |
Carruthers; Nicholas I. ; et
al. |
June 5, 2008 |
NON-PEPTIDIC NPY Y2 RECEPTOR INHIBITORS
Abstract
The invention provides novel non-peptidic NPY Y2 receptor
inhibitors useful in treating or preventing: anxiolytic disorders
or depression; injured mammalian nerve tissue; conditions
responsive to treatment through administration of a neurotrophic
factor; neurological disorders; bone loss; substance related
disorders; obesity; or an obesity-related disorder. Compounds of
the invention are also useful in modulating endocrine functions,
particularly endocrine functions controlled by the pituitary and
hypothalamic glands, and are therefore useful in the treatment or
prevention of inovulation and infertility.
Inventors: |
Carruthers; Nicholas I.;
(Poway, CA) ; Chai; Wenying; (San Diego, CA)
; Dax; Scott L.; (Landenberg, PA) ; Jablonowski;
Jill A.; (San Diego, CA) ; Li; Xiaobing;
(Flemington, NJ) ; Lovenberg; Timothy W.; (San
Diego, CA) ; Murray; William V.; (Belle Mead, NJ)
; Rudolph; Dale A.; (San Diego, CA) ; Seierstad;
Mark; (San Diego, CA) ; Youngman; Mark A.;
(Warminster, PA) |
Correspondence
Address: |
PHILIP S. JOHNSON;JOHNSON & JOHNSON
ONE JOHNSON & JOHNSON PLAZA
NEW BRUNSWICK
NJ
08933-7003
US
|
Family ID: |
34393019 |
Appl. No.: |
11/942387 |
Filed: |
November 19, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10949055 |
Sep 24, 2004 |
7317025 |
|
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11942387 |
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60505462 |
Sep 24, 2003 |
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Current U.S.
Class: |
514/318 ;
514/323; 514/419 |
Current CPC
Class: |
A61P 25/00 20180101;
A61P 25/24 20180101; A61P 25/22 20180101; A61P 3/04 20180101; C07D
401/12 20130101; A61P 15/08 20180101; C07D 401/14 20130101; C07D
409/14 20130101 |
Class at
Publication: |
514/318 ;
514/419; 514/323 |
International
Class: |
A61K 31/4545 20060101
A61K031/4545; A61K 31/404 20060101 A61K031/404; A61P 25/24 20060101
A61P025/24; A61P 3/04 20060101 A61P003/04; A61P 25/00 20060101
A61P025/00; A61K 31/454 20060101 A61K031/454 |
Claims
1-10. (canceled)
11. A method for the treatment or prevention of disease states
mediated by NPY Y2 receptor activity comprising the step of
administering to a mammal suffering there from a therapeutically
effective amount of compound having NPY Y2 receptor activity of
formula (I): ##STR00067## wherein the fused pyrrolidine ring
optionally contains a single carbon-carbon double bond or a single
carbon ring member adjacent to the nitrogen is optionally .dbd.O
substituted; n is 1 or 2; m is 0, 1, or 2; Y.sub.1 is a C.sub.0-5
alkylene, C.sub.0-5 alkenylene, C.sub.0-5 alkynylene,
C.sub.0-5acylene; --CH(CONR.sup.fR.sup.g)-- (where R.sup.f and
R.sup.g are independently H or C.sub.1-4alkyl), or
--CH(CO.sub.2C.sub.1-4alkyl)-; Y.sub.2 is H, phenyl, C.sub.4-8
cycloalkyl or C.sub.4-8 cycloalkenyl, each ring optionally
substituted with R.sup.q; Y.sub.3 is --CH.sub.2--, carbonyl or
sulfone; Y.sub.4 is a substituted or unsubstituted C.sub.2-7 alkyl,
C.sub.2-7 alkenyl, C.sub.2-7 alkynyl or C.sub.3-7cycloalkyl;
Y.sub.5 is phenyl, furanyl, thiophenyl, pyrrolyl, pyrrolinyl,
pyrrolidinyl, dioxolanyl, oxazolyl, thiazolyl, imidazolyl,
imidazolidinyl, pyrazolyl, pyrazolinyl, pyrazolidinyl, oxadiazolyl,
triazolyl, thiadiazolyl, pyranyl, pyridyl, piperidinyl, dioxanyl,
morpholinyl, dithianyl, thiomorpholinyl, pyridazinyl, pyrimidinyl,
pyrazinyl, piperazinyl, naphthalenyl, quinolonyl, purinyl, indolyl,
benzofuranyl, or benzothiophenyl, each optionally mono-, di- or
tri-substituted with R.sub.q; R.sub.1 is H or is ##STR00068## where
R.sub.a is H, a substituted or unsubstituted C.sub.1-5 alkyl,
C.sub.1-5 alkenyl, C.sub.1-5 alkynyl or C.sub.1-5 acyl, where the
substituent is C.sub.1-4alkoxy or one or more fluoro; R.sub.2 and
R.sub.3 are independently selected from H, a substituted or
unsubstituted C.sub.1-5 alkyl, C.sub.1-5 alkenyl, or C.sub.1-5
alkynyl, or R.sub.2 and R.sub.3 may be taken together with the
nitrogen of R.sub.3 attachment to form piperidine or pyrrolidine or
azepanyl; and R.sup.q is selected from the group consisting of
--OH, --C.sub.1-6 alkyl, --OC.sub.1-6 alkyl, Ph-, --OPh, benzyl,
--Obenzyl, --C.sub.3-6 cycloalkyl, --OC.sub.3-6 cycloalkyl, --CN,
--NO.sub.2, --N(R.sub.y)R.sub.z (wherein R.sub.y and R.sub.z are
independently selected from H, C.sub.1-6 alkyl, C.sub.1-6 alkenyl,
or R.sub.y and R.sub.z may be taken together with the nitrogen of
attachment to form an otherwise aliphatic hydrocarbon ring, said
ring having 4 to 7 members, optionally having one carbon replaced
with 0, .dbd.N--, NH or N(C.sub.1-4alkyl), optionally having one
carbon substituted with --OH, and optionally having one or two
unsaturated bonds in the ring), --(C.dbd.O)N(R.sub.y)R.sub.z,
--(N--R.sup.t)COR.sup.t, --(N--R.sub.t)SO.sub.2C.sub.1-6alkyl
(wherein R.sup.t is H or C.sub.1-6alkyl or two R.sub.t in the same
substituent may be taken together with the amide of attachment to
form an otherwise aliphatic hydrocarbon ring, said ring having 4 to
6 members), --(C.dbd.O)C.sub.1-6alkyl,
--(S.dbd.(O).sub.n)--C.sub.1-6alkyl (wherein n is selected from 0,
1 or 2), --SO.sub.2N(R.sub.y)R.sub.z, --SCF.sub.3, halo,
--CF.sub.3, --OCF.sub.3, --COOH and --COOC.sub.1-6 alkyl; and
enantiomers, diastereomers, hydrates, solvates and pharmaceutically
acceptable salts, esters and amides thereof.
12. A method of claim 11 for treatment of an anxiolytic disorder or
depression comprising administering to a subject suffering there
from a therapeutically effective amount of a compound of claim 1 or
enantiomers, diastereomers, hydrates, solvates and pharmaceutically
acceptable salts, esters and amides thereof.
13. A method of claim 11 for treatment of injured mammalian nerve
tissue comprising administering to a subject suffering there from a
therapeutically effective amount of a compound of claim 1 or
enantiomers, diastereomers, hydrates, solvates and pharmaceutically
acceptable salts, esters and amides thereof.
14. A method of claim 11 comprising administering to a subject
suffering from a condition amenable to treatment through
administration of a neurotrophic factor a therapeutically effective
amount of a compound of claim 1 or enantiomers, diastereomers,
hydrates, solvates and pharmaceutically acceptable salts, esters
and amides thereof.
15. A method of claim 11 for treatment of a neurological disorder
comprising administering to a subject suffering there from a
therapeutically effective amount of a compound of claim 1 or
enantiomers, diastereomers, hydrates, solvates and pharmaceutically
acceptable salts, esters and amides thereof.
16. A method of claim 11 for treatment of bone loss comprising
administering to a subject suffering there from a therapeutically
effective amount of a compound of claim 1 or enantiomers,
diastereomers, hydrates, solvates and pharmaceutically acceptable
salts, esters and amides thereof.
17. A method of claim 11 for treatment of obesity or an
obesity-related disorder comprising administering to a subject
suffering there from a therapeutically effective amount of a
compound of claim 1 or enantiomers, diastereomers, hydrates,
solvates and pharmaceutically acceptable salts, esters and amides
thereof.
18. A method of claim 11 for treatment of infertility comprising
administering to an infertile subject a therapeutically effective
amount of a compound of claim 1 or enantiomers, diastereomers,
hydrates, solvates and pharmaceutically acceptable salts, esters
and amides thereof.
19. A method of claim 11 for treatment of an endocrine disorder
comprising administering to a subject suffering there from a
therapeutically effective amount of a compound of claim 1 or
enantiomers, diastereomers, hydrates, solvates and pharmaceutically
acceptable salts, esters and amides thereof.
20. A method of claim 11 for treatment of substance related
disorders comprising administering to a subject suffering there
from a therapeutically effective amount of a compound of claim 1 or
enantiomers, diastereomers, hydrates, solvates and pharmaceutically
acceptable salts, esters and amides thereof.
Description
FIELD OF THE INVENTION
[0001] The invention provides novel non-peptidic NPY Y2 receptor
inhibitors useful in treating or preventing: anxiolytic disorders
and depression; injured mammalian nerve tissue; a condition
responsive to treatment through administration of a neurotrophic
factor; a neurological disorder; bone loss; substance related
disorders; obesity; or an obesity-related disorder. Compounds of
the invention are also useful in modulating endocrine functions;
particularly endocrine functions controlled by the pituitary and
hypothalamic glands, and may be used to treat inovulation and
infertility.
BACKGROUND OF THE INVENTION
[0002] Regulation and function of the mammalian central nervous
system is governed by a series of interdependent receptors,
neurons, neurotransmitters, and proteins. The neurons play a vital
role in this system, for when externally or internally stimulated,
they react by releasing neurotransmitters that bind to specific
proteins. Common examples of endogenous small molecule
neurotransmitters such as acetylcholine, adrenaline,
norepinephrine, dopamine, serotonin, glutamate, and
gamma-aminobutyric acid are well known, as are the specific
receptors that recognize these compounds as ligands ("The
Biochemical Basis of Neuropharmacology", Sixth Edition, Cooper, J.
R.; Bloom, F. E.; Roth, R. H. Eds., Oxford University Press, New
York, N.Y. 1991).
[0003] In addition to the endogenous small molecule
neurotransmitters, there is increasing evidence that neuropeptides
play an integral role in neuronal operations. Neuropeptides are now
believed to be co-localized with perhaps more than one-half of the
100 billion neurons of the human central nervous system. In
addition to being found in humans, neuropeptides have been
discovered in a number of animal species. In some instances, the
composition of these peptides is remarkably homogenous among
species. This finding suggests that the function of neuropeptides
is vital and has been impervious to evolutionary changes.
Furthermore, neuropeptides, unlike small molecule
neurotransmitters, are typically synthesized by the neuronal
ribosome. In some cases, the active neuropeptides are produced as
part of a larger protein that is enzymatically processed to yield
the active substance. Based upon these differences, compared to
small molecule neurotransmitters, neuropeptide-based strategies may
offer novel therapies for the treatment of CNS diseases and
disorders. Specifically, agents that affect the binding of
neuropeptides to their respective receptors or ameliorate responses
that are mediated by neuropeptides are potential therapies for
diseases associated with neuropeptides.
[0004] There are a number of afflictions that are associated with
the complex interdependent system of receptors and ligands within
the central nervous system; these include neurodegenerative
diseases, affective disorders such as anxiety, depression, pain and
schizophrenia, and affective conditions that include a metabolic
component, namely obesity. Such conditions, disorders, and diseases
have been treated with small molecules and peptides that modulate
neuronal responses to endogenous neurotransmitters.
[0005] One example of this class of neuropeptides is neuropeptide Y
(NPY). NPY was first isolated from porcine brain (Tatemoto, K. et
al. Nature 1982, 296, 659) and was shown to be structurally similar
to other members of the pancreatic polypeptide (PP) family such as
peptide YY, which is primarily synthesized by endocrine cells in
the gut, and pancreatic polypeptide, which is synthesized by the
pancreas. NPY is a single peptide protein that consists of
thirty-six amino acids containing an amidated C-terminus. Like
other members of the pancreatic polypeptide family, NPY has a
distinctive conformation that consists of an N-terminal polyproline
helical region and an amphiphilic alpha-helix joined by a
characteristic PP-fold (Vladimir, S. et al. Biochemistry 1990, 20,
4509). Furthermore, NPY sequences from a number of animal species
have been elucidated and all show a high degree of amino acid
homology to the human protein (more than 94% in rat, dog, rabbit,
pig, cow, sheep) (see Larhammar, D. in "The Biology of Neuropeptide
Y and Related Peptides", Colmers, W. F. and Wahlestedt, C. Eds.,
Humana Press, Totowa, N.J. 1993).
[0006] Endogenous receptor proteins that bind NPY and related
peptides as ligands have been identified and distinguished, and
several such proteins have been cloned and expressed. Six different
receptor subtypes [Y1, Y2, Y3, Y4 (PP), Y5, Y6 (formerly designated
as a Y5 receptor)] are recognized today based upon binding profile,
pharmacology, and/or composition if identity is known (Wahlestedt,
C. et al. Ann. N.Y. Acad. Sci. 1990, 611, 7; Larhammar, D. et al.
J. Biol. Chem. 1992, 267, 10935; Wahlestedt, C. et al. Regul. Pept.
1986, 13, 307; Fuhlendorff, J. U. et al. Proc. Natl. Acad. Sci.
U.S.A. 1990, 87, 182; Grundemar, L. et al. J. Pharmacol. Exp. Ther.
1991, 258, 633; Laburthe, M. et al. Endocrinology 1986, 118, 1910;
Castan, I. et al. Endocrinology 1992, 131, 1970; Gerald, C. et al.
Nature 1996, 382, 168; Weinberg, D. H. et al. J. Biol. Chem. 1996,
271, 16435; Gehlert, D. et al. Curr. Pharm. Des. 1995, 1, 295;
Lundberg, J. M. et al. Trends in Pharmacological Sciences 1996, 17,
301). Most and perhaps all NPY receptor proteins belong to the
family of so-called G-protein coupled receptors (GPCRs). The
neuropeptide Y5 receptor, a putative GPCR, is negatively coupled to
cellular cyclic adenosine monophosphate (cAMP) levels via the
action of adenylate cyclase (Gerald, C. et al. Nature 1996, 382,
168; Gerald, C. et al. PCT WO 96/16542). For example, NPY inhibits
forskolin-stimulated cAMP production/levels in a neuroblastoma cell
line. A Y5 ligand that mimics NPY in this fashion is an agonist
whereas one that competitively reverses the NPY inhibition of
forskolin-stimulated cAMP production is an antagonist.
[0007] The neuropeptide Y2 receptor has high affinity for NPY and
PYY, but unlike the Y1 receptor, is relatively resistant to the
effect of the N-terminal deletion and retains a high binding
affinity for the C-terminal fragments such as NPY.sub.13-36
(Blomqvist, A. G. et al. Trends Neurosci. 1997, 20, 294-298).
[0008] NPY itself is the archetypal substrate for the NPY receptors
and its binding can elicit a variety of pharmacological and
biological effects in vitro and in vivo. When administered to the
brain of live animals (intracerebroventricularly (icv) or into the
amygdala), NPY produces anxiolytic effects in established animal
models of anxiety such as the elevated plus-maze, Vogel punished
drinking, and Geller-Seifter's bar-pressing conflict paradigms
(Heilig, M. et al. Psychopharmacology 1989, 98, 524; Heilig, M. et
al. Regul. Pept. 1992, 41, 61; Heilig, M. et al.
Neuropsychopharmacology 1993, 8, 357). Thus, compounds that mimic
NPY are postulated to be useful for the treatment of anxiolytic
disorders.
[0009] The immunoreactivity of NPY is notably decreased in the
cerebrospinal fluid of patients with major depression and those of
suicide victims (Widdowson, P. S. et al. J. Neurochem. 1992, 59,
73), and rats treated with tricyclic antidepressants display
significant increases of NPY relative to a control group (Heilig,
M. et al. Eur. J. Pharmacol. 1988, 147, 465). These findings
suggest that an inadequate NPY response may play a role in some
depressive illnesses, and that compounds that regulate the
NPY-ergic system may be useful for the treatment of depression.
[0010] NPY improves memory and performance scores in animal models
of learning (Flood, J. F. et al. Brain Res. 1987, 421, 280) and
therefore may serve as a cognition enhancer for the treatment of
neurodegenerative diseases such as Alzheimer's Disease (AD) as well
as AIDS-related and senile dementia.
[0011] Elevated plasma levels of NPY are present in animals and
humans experiencing episodes of high sympathetic nerve activity
such as surgery, newborn delivery and hemorrhage (Morris, M. J. et.
al. J. Auton. Nerv. Syst. 1986, 17, 143). Thus, chemical substances
that alter the NPY-ergic system may be useful for alleviating
migraine, pain, and the condition of stress.
[0012] NPY also mediates endocrine functions such as the release of
luteinizing hormone (LH) in rodents (Kalra, S. P. et. al. Front.
Neuroendrocrinol. 1992, 13, 1). Since LH is vital for mammalian
ovulation, a compound that mimics the action of NPY could be useful
for the treatment of infertility, particularly in women with
so-called luteal phase defects.
[0013] NPY is a powerful stimulant of food intake; as little as
one-billionth of a gram, when injected directly into the CNS,
causes satiated rats to overeat (Clark, J. T. et al. Endocrinology
1984, 115, 427; Levine, A. S. et al. Peptides 1984, 5, 1025;
Stanley, B. G. et al. Life Sci. 1984, 35, 2635; Stanley, B. G. et
al. Proc. Nat. Acad. Sci. U.S.A. 1985, 82, 3940). Thus NPY is
orexigenic in rodents but not anxiogenic when given
intracerebroventricularly and so antagonism of neuropeptide
receptors may be useful for the treatment of diabetes and eating
disorders such as obesity, anorexia nervosa, and bulimia
nervosa.
[0014] It is known that the anxiolytic properties of NPY are
mediated through postsynaptic Y1 receptors, whereas presynaptic Y2
receptors negatively control the release of NPY and other
cotransmitters (e.g. GABA). Consequently, antagonism of the Y2
receptor may lead to enhanced GABAergic and NPYergic effects and Y2
receptor antagonists should prove useful in the treatment of
depression and anxiety.
[0015] Recently, a key role of presynaptic hypothalamic Y2 receptor
has been suggested in central coordination of energy homeostasis
and bone mass regulation (Herzog, H. et al. Drug News &
Perspectives 2002, 15, 506-510). Studies analyzing Y2 receptor
knockout mice have started to unravel some of the individual
functions of this receptor subtype. Y2 receptor knockout mice do
show a reduced body weight despite an increase in food intake,
which is possibly due to the lack of the feedback inhibition of the
postprandially released PYY.sub.3-36 (Batterham, R. L. et al.
Nature 2002, 418, 650-654). The Y2 receptor knockout mice also show
a significant increase in bone formation (Baldock, P. A. J. Clin.
Invest. 2002, 109, 915-921). Specific deletion of the Y2 receptor
in the hypothalamus in adult conditional Y2 receptor knockout mice
also causes an increase in bone formation.
[0016] Grouzmann and coworkers described a peptide-based ligand,
T4-[NPY 33-36], which showed considerable affinity (IC.sub.50=67
nM) for the NPY Y2 receptor (Grouzmann, E., et al. J. Biol. Chem.
1997, 272, 7699-7706). BIIE0246 also binds to the NYP Y2 receptor
with significant affinity (IC.sub.50=3.3 nM) (Doods, H., et al.
Eur. J. Pharmacol. 1999, 384, R3-R5). However, the therapeutic
potential for these compounds is limited due to their peptide-like
composition and elevated molecular weight.
[0017] Studies also indicate that NPY Y2 is involved in the
neurobiological responses to ethanol and other drugs of abuse.
Thiele and coworkers (Neuropeptides, 2004, 38(4), 235-243; Peptides
2004, 25(6), 975-983) described the low ethanol consumption of Y2
receptor knockout mice, as well as their increased voluntary water
consumption. Therefore, modulators of NPY Y2 may allow for the
treatment of alcohol and drug abuse.
[0018] Accordingly, it is an object of the present invention to
provide novel non-peptidic NPY Y2 receptor inhibitors that are
useful in modulating or treating: anxiolytic disorders and
depression; a condition requiring treatment of injured mammalian
nerve tissue; a condition amenable to treatment through
administration of a neurotrophic factor; a neurological disorder;
bone loss; substance related disorders; obesity; an obesity-related
disorder; and a condition related to an endocrine function
including inovulation and infertility.
SUMMARY OF THE INVENTION
[0019] The invention provides novel non-peptidic NPY Y2 receptor
inhibitors of the formula (I):
##STR00001##
wherein [0020] the fused pyrrolidine ring optionally contains a
single carbon-carbon double bond or a single carbon ring member
adjacent to the nitrogen is optionally .dbd.O substituted; [0021] n
is 1 or 2; [0022] m is 0, 1, or 2; [0023] Y.sub.1 is a C.sub.0-5
alkylene, C.sub.0-5 alkenylene, C.sub.0-5 alkynylene,
C.sub.0-5acylene; --CH(CONR.sup.fR.sup.g)-- (where R.sup.f and
R.sup.g are independently H or C.sub.1-4alkyl), or
--CH(CO.sub.2C.sub.1-4alkyl)-; [0024] Y.sub.2 is H, phenyl,
C.sub.4-8 cycloalkyl or C.sub.4-8 cycloalkenyl, each ring
optionally substituted with R.sup.q; [0025] Y.sub.3 is
--CH.sub.2--, carbonyl or sulfone; [0026] Y.sub.4 is a substituted
or unsubstituted C.sub.2-7 alkyl, C.sub.2-7 alkenyl, C.sub.2-7
alkynyl or C.sub.3-7cycloalkyl; [0027] Y.sub.5 is phenyl, furanyl,
thiophenyl, pyrrolyl, pyrrolinyl, pyrrolidinyl, dioxolanyl,
oxazolyl, thiazolyl, imidazolyl, imidazolidinyl, pyrazolyl,
pyrazolinyl, pyrazolidinyl, oxadiazolyl, triazolyl, thiadiazolyl,
pyranyl, pyridyl, piperidinyl, dioxanyl, morpholinyl, dithianyl,
thiomorpholinyl, pyridazinyl, pyrimidinyl, pyrazinyl, piperazinyl,
naphthalenyl, quinolonyl, purinyl, indolyl, benzofuranyl, or
benzothiophenyl, each optionally mono-, di- or tri-substituted with
R.sup.q; [0028] R.sub.1 is H or is
[0028] ##STR00002## [0029] where R.sub.a is H, a substituted or
unsubstituted C.sub.1-5 alkyl, C.sub.1-5 alkenyl, C.sub.1-5 alkynyl
or C.sub.1-5 acyl, where the substituent is C.sub.1-4alkoxy or one
or more fluoro; [0030] R.sub.2 and R.sub.3 are independently
selected from H, a substituted or unsubstituted C.sub.1-5 alkyl,
C.sub.1-5 alkenyl, or C.sub.1-5 alkynyl, or R.sub.2 and R.sub.3 may
be taken together with the nitrogen of R.sub.3 attachment to form
piperidine or pyrrolidine or azepine; and [0031] R.sup.q is
selected from the group consisting of --OH, --C.sub.1-6 alkyl,
--OC.sub.1-16 alkyl, Ph-, --OPh, benzyl, --Obenzyl, --C.sub.3-6
cycloalkyl, --OC.sub.3-6 cycloalkyl, --CN, --NO.sub.2,
--N(R.sup.y)R.sup.z (wherein R.sup.y and R.sup.z are independently
selected from H, C.sub.1-6 alkyl, C.sub.1-6 alkenyl, or R.sup.y and
R.sup.z may be taken together with the nitrogen of attachment to
form an otherwise aliphatic hydrocarbon ring, said ring having 4 to
7 members, optionally having one carbon replaced with O, .dbd.N--,
NH or N(C.sub.1-4alkyl), optionally having one carbon substituted
with --OH, and optionally having one or two unsaturated bonds in
the ring), --(C.dbd.O)N(R.sup.y)R.sup.z, --(N--R.sup.t)COR.sup.t,
--(N--R.sup.t)SO.sub.2C.sub.1-6alkyl (wherein R.sup.t is H or
C.sub.1-6alkyl or two R.sup.t in the same substituent may be taken
together with the amide of attachment to form an otherwise
aliphatic hydrocarbon ring, said ring having 4 to 6 members),
--(C.dbd.O)C.sub.1-6alkyl, --(S.dbd.(O).sub.n)--C.sub.1-6alkyl
(wherein n is selected from 0, 1 or 2),
--SO.sub.2N(R.sup.y)R.sup.z, --SCF.sub.3, halo, --CF.sub.3,
--OCF.sub.3, --COOH and --COOC.sub.1-6 alkyl; and enantiomers,
diastereomers, hydrates, solvates and pharmaceutically acceptable
salts, esters and amides thereof.
[0032] The invention also features pharmaceutical compositions
containing such compounds and methods of using such compositions in
the treatment or prevention of disease states mediated by NPY Y2
receptor activity.
[0033] These and additional aspects of the invention are disclosed
in the following detailed description.
DETAILED DESCRIPTION OF THE INVENTION
[0034] In a preferred embodiment, the invention provides compounds
of formula (I) that have the formula (II):
##STR00003##
where R.sub.b is H, COCH.sub.3, CHO, COCH.sub.2COCH.sub.3,
COCO.sub.2C.sub.2H.sub.5, CH.sub.3, SO.sub.2CH.sub.3, or COCF.sub.3
and X is 4-CF.sub.3, 3-CF.sub.3, 2-CF.sub.3, 3-Br, 3-F, 3-Cl,
3-CH.sub.3, 3-NO.sub.2, 3-CN, 3-SOCF.sub.3, 3,5-diF,
3,5-diCH.sub.3, 3,5-diCl, or 4-Cl.
[0035] In another preferred embodiment, the invention provides
compounds of formula (I) that have the formula (III):
##STR00004##
where R.sub.c is N-(1-acetyl)-tetrahydroquinolin-7-yl,
2-oxo-2,3-dihydro-1H-indol-6-yl, or N-(1-acetyl)-1H-indol-6-yl and
X is 4-CF.sub.3, 3-CF.sub.3, 2-CF.sub.3, 3-Br, 3-F, 3-Cl,
3-CH.sub.3, 3-NO.sub.2, 3-CN, 3-SOCF.sub.3, 3,5-diF,
3,5-diCH.sub.3, 3,5-diCl, or 4-Cl.
[0036] In another preferred embodiment, the invention provides
compounds of formula (I) that have the formula (IV):
##STR00005##
where R.sub.d is COCH.sub.2CH.sub.2C.sub.6H.sub.4X,
CO(C.sub.3H.sub.4)C.sub.6H.sub.4X,
E-CH.sub.2CH.dbd.CHC.sub.6H.sub.4X,
E-SO.sub.2CH.dbd.CHC.sub.6H.sub.4X, COC.ident.CC.sub.6H.sub.4X,
Z-COCH.dbd.CHC.sub.6H.sub.4X,
(E,E)-CO(CH.dbd.CH).sub.2C.sub.6H.sub.5, CH.dbd.CH.sub.2,
E-COCH.dbd.CH(3-thiophenyl)X, E-COCH.dbd.CH(pyridyl)X,
E-COCH.dbd.CH(1-hydroxy-pyridyl), or E-COCH.dbd.CH(2-imidazolyl)X
and X is 4-CF.sub.3, 3-CF.sub.3, 2-CF.sub.3, 3-Br, 3-F, 3-Cl,
3-CH.sub.3, 3-NO.sub.2, 3-CN, 3-SOCF.sub.3, 3,5-diF,
3,5-diCH.sub.3, 3,5-diCl, or 4-Cl.
[0037] In another preferred embodiment, the invention provides
compounds of formula (I) that have the formula (V):
##STR00006##
where R.sub.e is COC.sub.6H.sub.5, CH.sub.2CH.sub.2C.sub.6H.sub.5,
CH.sub.2CH.sub.2CH.sub.2C.sub.6H.sub.5,
CH(CO.sub.2CH.sub.3)C.sub.6H.sub.5,
CH(CONHCH.sub.2CH.sub.3)C.sub.6H.sub.5, CH.sub.2C.sub.6H.sub.11,
CH.sub.2CH.sub.2C.sub.6H.sub.11, or CH.sub.2CH.sub.2C.sub.5H.sub.9,
and X is 4-CF.sub.3, 3-CF.sub.3, 2-CF.sub.3, 3-Br, 3-F, 3-Cl,
3-CH.sub.3, 3-NO.sub.2, 3-CN, 3-SOCF.sub.3, 3,5-diF,
3,5-diCH.sub.3, 3,5-diCl, or 4-Cl.
[0038] In another preferred embodiment, the invention provides
compounds of formula (I) that have the formula (VI):
##STR00007##
where R.sub.2 is H, C.sub.1-3alkyl, or allyl and R.sub.3 is H, or
R.sub.2 and R.sub.3 are taken together to be a divalent moiety
--CH.sub.2--, m is 1 or 2, and X is 4-CF.sub.3, 3-CF.sub.3,
2-CF.sub.3, 3-Br, 3-F, 3-Cl, 3-CH.sub.3, 3-NO.sub.2, 3-CN,
3-SOCF.sub.3, 3,5-diF, 3,5-diCH.sub.3, 3,5-diCl, or 4-Cl.
[0039] Preferred compounds of the present invention are selected
from the group consisting of:
TABLE-US-00001 EX CHEMICAL NAME 1
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-phenyl-acrylamide; 2
trans-N-(1-Benzyl-piperidin-4-yl)-N-(2,3-dihydro-1H-indol-6-yl)-3-
phenyl-acrylamide; 3
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1-formyl-2,3-dihydro-1H-
indol-6-yl)-3-phenyl-acrylamide; 4
trans-N-(1-Benzyl-piperidin-4-yl)-N-[1-(3-oxo-butyryl)-2,3-
dihydro-1H-indol-6-yl]-3-phenyl-acrylamide; 5
trans-{6-[(1-Benzyl-piperidin-4-yl)-(3-phenyl-acryloyl)-amino]-
2,3-dihydro-indol-1-yl}-oxo-acetic acid ethyl ester; 6
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1-methyl-2,3-dihydro-1H-
indol-6-yl)-3-phenyl-acrylamide; 7
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1-methanesulfonyl-2,3-
dihydro-1H-indol-6-yl)-3-phenyl-acrylamide; 8
trans-N-(1-Benzyl-piperidin-4-yl)-3-phenyl-N-[1-(2,2,2-trifluoro-
acetyl)-2,3-dihydro-1H-indol-6-yl]-acrylamide; 9
trans-N-(1-Acetyl-1,2,3,4-tetrahydro-quinolin-7-yl)-N-(1-benzyl-
piperidin-4-yl)-3-phenyl-acrylamide; 10
trans-N-(1-Benzyl-piperidin-4-yl)-N-(2-oxo-2,3-dihydro-1H-indol-
6-yl)-3-phenyl-acrylamide; 11
trans-N-(1-Acetyl-1H-indol-6-yl)-N-(1-benzyl-piperidin-4-yl)-3-
phenyl-acrylamide; 12
N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin-4-
yl)-3-phenyl-propionamide; 13 trans-2-Phenyl-cyclopropanecarboxylic
acid (1-acetyl-2,3-
dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide; 14
trans-1-{6-[(1-Benzyl-piperidin-4-yl)-(3-phenyl-allyl)-amino]-2,3-
dihydro-indol-1-yl}-ethanone; 15 trans-2-Phenyl-ethenesulfonic acid
(1-acetyl-2,3-dihydro-1H-
indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide; 16 3-Phenyl-propynoic
acid (1-acetyl-2,3-dihydro-1H-indol-6-yl)-(1-
benzyl-piperidin-4-yl)-amide; 17
cis-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin-
4-yl)-3-phenyl-acrylamide; 18
trans,trans-5-Phenyl-penta-2,4-dienoic acid (1-acetyl-2,3-
dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide; 19
N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin-4-
yl)-acrylamide; 20
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-thiophen-3-yl-acrylamide; 21
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-pyridin-2-yl-acrylamide; 22
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-pyridin-3-yl-acrylamide; 23
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-pyridin-4-yl-acrylamide; 24
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(1-oxy-pyridin-4-yl)-acrylamide; 25
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(1H-imidazol-2-yl)-acrylamide; 26
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(4-trifluoromethyl-phenyl)-acrylamide; 27
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-trifluoromethyl-phenyl)-acrylamide; 28
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(2-trifluoromethyl-phenyl)-acrylamide; 29
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-bromo-phenyl)-acrylamide; 30
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-fluoro-phenyl)-acrylamide; 31
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-chloro-phenyl)-acrylamide; 32
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-m-tolyl-acrylamide; 33
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-nitro-phenyl)-acrylamide; 34
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-cyano-phenyl)-acrylamide; 35
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3-trifluoromethanesulfinyl-phenyl)-acrylamide;
36 trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3,5-difluoro-phenyl)-acrylamide; 37
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3,5-dimethyl-phenyl)-acrylamide; 38
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(3,5-dichloro-phenyl)-acrylamide; 39
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzoyl-
piperidin-4-yl)-3-phenyl-acrylamide; 40
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-phenethyl-
piperidin-4-yl)-3-phenyl-acrylamide; 41
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-phenyl-N-[1-(3-
phenyl-propyl)-piperidin-4-yl]-acrylamide; 42
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-
cyclohexylmethyl-piperidin-4-yl)-3-phenyl-acrylamide; 43
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclohexyl-
ethyl)-piperidin-4-yl]-3-phenyl-acrylamide; 44
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclopentyl-
ethyl)-piperidin-4-yl]-3-phenyl-acrylamide; 45
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-3-yl)-3-phenyl-acrylamide; 46
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
pyrrolidin-3-yl)-3-phenyl-acrylamide; 47
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(3-benzylamino-
propyl)-3-phenyl-acrylamide; 48
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[3-(allyl-benzyl-
amino)-propyl]-3-phenyl-acrylamide; 49
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(4-chloro-phenyl)-
N-[1-(2-cyclohexyl-ethyl)-piperidin-4-yl]-acrylamide; 50
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclohexyl-
ethyl)-piperidin-4-yl]-3-(3-nitro-phenyl)-acrylamide; 51
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(4-chloro-phenyl)-
N-[1-(2-cyclopentyl-ethyl)-piperidin-4-yl]-acrylamide; 52
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclopentyl-
ethyl)-piperidin-4-yl]-3-(3-nitro-phenyl)-acrylamide; 53
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(3-cyano-phenyl)-
N-[1-(2-cyclopentyl-ethyl)-piperidin-4-yl]-acrylamide; 54
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-
piperidin-4-yl)-3-(4-chloro-phenyl)-acrylamide; 55
trans-{4-[(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-(3-phenyl-acryloyl)-
amino]-piperidin-1-yl}-phenyl-acetic acid methyl ester; and 56
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-
(ethylcarbamoyl-phenyl-methyl)-piperidin-4-yl]-3-phenyl-
acrylamide.
[0040] Although all the compounds of formula (I) are novel for the
uses and in the formulations taught herein, not all compounds of
formula I are novel as such. The compound of the structure:
##STR00008##
was available from Peakdale Molecular (ID# PRD-0817) prior to the
date of the present invention.
[0041] The present invention includes the pharmaceutically
acceptable acid addition salts of compounds of formula (I). The
acids which are used to prepare the pharmaceutically acceptable
acid addition salts of the aforementioned base compounds of this
invention are those which form non-toxic acid addition salts, i.e.,
salts containing pharmacologically acceptable anions, such as the
hydrochloride, hydrobromide, hydrochloride, sulfate, bisulfate,
nitrate, acetate, oxalate, valerate, oleate, palmitate, stearate,
laurate, borate, benzoate, lactate, phosphate, tosylate, citrate,
maleate, fumarate, succinate, tartrate, naphthylate, mesylate,
glucoheptonate, lactiobionate, saccharate, ethanesulfonate,
benzenesulfonate, and pamoate [i.e.,
1,1'-methylene-bis-(2-hydroxy-3 naphthoate)] salts.
[0042] The invention also includes base addition salts of formula
(I). The chemical bases that may be used as reagents to prepare
pharmaceutically acceptable base salts of those compounds of
formula (I) that are acidic in nature are those that form non-toxic
base salts with such compounds. Such non-toxic base salts include,
but are not limited to those derived from such pharmacologically
acceptable cations such as alkali metal cations (e.g., potassium
and sodium) and alkaline earth metal cations (e, calcium and
magnesium), ammonium or water-soluble amine addition salts such as
N-methylglucamine (meglumine), and the lower alkanolammonium and
other base salts of pharmaceutically acceptable organic amines. See
example, S. M. Berge, et al., "Pharmaceutical Salts," J. Pharm.
Sci., 1977, 66:1-19, which is incorporated herein by reference.
[0043] Representative pharmaceutically acceptable amides of the
invention include those derived from ammonia, primary C.sub.1-6
alkyl amines and secondary di(C.sub.1-6alkyl) amines. Secondary
amines include 5- or 6-membered heterocyclic or heteroaromatic ring
moieties containing at least one nitrogen atom and optionally
between 1 and 2 additional heteroatoms. Preferred amides are
derived from ammonia, C.sub.1-3alkyl primary amines, and
di(C.sub.1-2alkyl)amines. Representative pharmaceutically
acceptable esters of the invention include C.sub.1-7alkyl,
C.sub.5-7cycloalkyl, phenyl, and phenyl(C.sub.1-6)alkyl esters.
Preferred esters include methyl esters.
[0044] The compounds of this invention include all stereoisomers
(i.e., cis and trans isomers) and all optical isomers of compounds
of the formula (I) (e.g., R and S enantiomers), as well as racemic,
diastereomeric and other mixtures of such isomers, as well as all
polymorphs of the compounds.
[0045] The features and advantages of the invention are apparent to
one of ordinary skill in the art. Based on this disclosure,
including the summary, detailed description, background, examples,
and claims, one of ordinary skill in the art will be able to make
modifications and adaptations to various conditions and usages.
Publications described herein are incorporated by reference in
their entirety.
[0046] Representative compounds of the present invention can be
synthesized in accordance with the general synthetic methods
described below. Since the scheme is an illustration, the invention
should not be construed as being limited by the chemical reactions
and conditions expressed. The preparation of the various starting
materials used in the schemes is well within the skill of persons
versed in the art.
##STR00009##
[0047] The compounds of formula (I) of the invention may be
produced by any number of reaction schemes. Referring to Scheme A,
wherein Y.sub.1-Y.sub.5, R.sub.1-3, and n are as defined
previously, a 1-substituted-6-aminoindoline A1 can be reacted with
ketone (A2) under conditions of a reductive amination to form amine
(A3). The reaction is typically performed using Na(OAc).sub.3BH as
the reducing agent in the presence of AcOH, in a solvent such as
CH.sub.2Cl.sub.2 or 1,2-dichloroethane. The amine (A3) is then
reacted with a carboxylic acid under peptide coupling conditions,
with a sulfonyl chloride or an acyl chloride in the presence of a
suitable base such as triethylamine, or with an alkyl halide, to
form derivative (I). Acyl chlorides useful in the transformation
can also be prepared from commercially available carboxylic acids
using oxalyl chloride and catalytic DMF. Suitable protecting groups
are used where appropriate throughout the synthesis.
##STR00010##
[0048] Referring to Scheme B, the compounds of formula (I) may be
prepared by an alternate method. Amine (A3) is converted to
phosphonate (B1) by reaction with an appropriate phosphonoacetic
acid ester. Typically a mixture of amine (A3) and the
phosphonoacetic acid ester is heated at reflux in a hydrocarbon
solvent such as xylenes, with or without the addition of catalytic
DMAP. Phosphonate (B1) is then coupled with an appropriate aldehyde
to form enamide (I). The cis and trans double bond isomers are
independently accessible using this sequence. Suitable conditions
for obtaining the trans isomer involve use of the phosphonic acid
diethyl ester (B1) in the presence of LiCl and DBU in acetonitrile.
The cis isomer can be obtained by reacting the phosphonic acid
bis-(2,2,2-trifluoro-ethyl) ester (B1) with a base such as
potassium bis(trimethylsilyl)amide in the presence of a solvating
agent such as 18-crown-6.
[0049] It is generally preferred that the respective product of
each process step be separated from other components of the
reaction mixture and subjected to purification before its use as a
starting material in a subsequent step. Separation techniques
typically include evaporation, extraction, precipitation and
filtration. Purification techniques typically include column
chromatography (Still, W. C., et al., J. Org. Chem. 1978, 43,
2921), thin-layer chromatography, crystallization and
distillation.
[0050] As used herein, the following terms have the following
respective meanings. Other terms that are used to describe the
present invention have the same definitions as those generally used
by those skilled in the art. Specific examples recited in any
definition are not intended to be limiting in any way.
[0051] "Hydrocarbon" refers to a substituted or unsubstituted
organic compound.
[0052] "Acetal" refers to a compound in which two ether oxygens are
bound to the same carbon. A "ketal" is an acetal derived from a
ketone (a compound of the formula RR'CO, where R and R' are alkyl,
aryl, or heterocyclic radicals).
[0053] "Acyloxy" refers to the groups alkyl-C(O)O--, substituted
alkyl-C(O)O--, cycloalkyl-C(O)O--, substituted cycloalkyl-C(O)O--,
aryl-C(O)O--, heteroaryl-C(O)O--, and heterocyclic-C(O)O-- wherein
alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl,
heteroaryl, and heterocyclic are as defined herein.
[0054] "Acyl" means a compound of the formula RCO, where R is
aliphatic (characterized by a straight chain of carbon atoms),
alicyclic (a saturated hydrocarbon containing at least one ring),
or aromatic.
[0055] "Alkyl" refers to a fully saturated monovalent hydrocarbon
radical containing carbon and hydrogen, which may be a straight
chain, branched, or cyclic. Examples of alkyl groups are methyl,
ethyl, n-butyl, n-heptyl, isopropyl, 2-methylpropyl, cyclopropyl,
cyclopropylmethyl, cyclobutyl, cyclopentyl, cyclopentylethyl and
cyclohexyl. "Cycloalkyl" groups refer to cyclic alkyl groups such
as cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl.
C.sub.1-C.sub.7 alkyl groups are preferably used in the present
invention.
[0056] "Substituted alkyl" refers to alkyls as just described which
include one or more functional groups such an alkyl containing from
1 to 6 carbon atoms, preferably a lower alkyl containing 1-3 carbon
atoms, aryl, substituted aryl, acyl, halogen (i.e., alkyl halos,
e.g., CF.sub.3), hydroxy, alkoxy, alkoxyalkyl, amino, alkyl and
dialkyl amino, acylamino, acyloxy, aryloxy, aryloxyalkyl,
carboxyalkyl, carboxamido, thio, thioethers, both saturated and
unsaturated cyclic hydrocarbons, heterocycles and the like. The
term "substituted cycloalkyl" has essentially the same definition
as and is subsumed under the term "substituted alkyl" for purposes
of describing the present invention. An "alkyl phenone" is an
aromatic ketone bound to an alkyl; an "alkenyl phenone is an
aromatic ketone bound to an alkylene.
[0057] "Amine" refers to substituted or unsubstituted aliphatic
amines (e.g., ethyl amine), aromatic amines (e.g., aniline),
saturated heterocyclic amines (e.g., piperidine), substituted
derivatives such as an alkly morpoline, aromatic heterocyclic
compounds including but not limited to pyridine, purine, or
indoline.
[0058] "Aralkyl" refers to an alkyl group with an aryl substituent,
and the term "aralkylene" refers to an alkenyl group with an aryl
substituent; the term "alkaryl" refers to an aryl group that has an
alkyl substituent, and the term "alkarylene" refers to an arylene
group with an alkyl substituent.
[0059] "Alkenyl" refers to a branched or unbranched hydrocarbon
group typically although not necessarily containing 2 to about 24
carbon atoms and at least one double bond, such as ethenyl,
n-propenyl, isopropenyl, n-butenyl, isobutenyl, octenyl, decenyl,
and the like. Generally, though not necessarily, alkenyl groups
herein contain 2 to about 12 carbon atoms. The term "lower alkenyl"
intends an alkenyl group of two to six carbon atoms, preferably two
to four carbon atoms.
[0060] "Substituted alkenyl" refers to alkenyl substituted with one
or more substituent groups, and the terms "heteroatom-containing
alkenyl" and "heteroalkenyl" refer to alkenyl in which at least one
carbon atom is replaced with a heteroatom.
[0061] "Aryl" refers to a substituted or unsubstituted monovalent
aromatic radical having a single ring (e.g., phenyl) or multiple
condensed rings (e.g., naphthyl). Other examples include
heterocyclic aromatic ring groups having one or more nitrogen,
oxygen, or sulfur atoms in the ring, such as imidazolyl, furyl,
pyrrolyl, pyridyl, thienyl and indolyl, among others. The term
"arylene" refers to the diradical derived from aryl (including
substituted aryl) as exemplified by 1,2-phenylene, 1,3-phenylene,
1,4-phenylene, 1,2-naphthylene and the like.
[0062] "Substituted aryl" refers to an aryl as just described that
contains one or more functional groups such as lower alkyl, acyl,
aryl, halogen, alkylhalos (e.g., CF.sub.3), hydroxy, alkoxy,
alkoxyalkyl, amino, alkyl and dialkyl amino, acylamino, acyloxy,
aryloxy, aryloxyalkyl, carboxyalkyl, carboxamido, thio, thioethers,
both saturated and unsaturated cyclic hydrocarbons, heterocycles
and the like.
[0063] "Alkynyl" as used herein refers to a branched or unbranched
hydrocarbon group typically although not necessarily containing 2
to about 24 carbon atoms and at least one triple bond, such as
ethynyl, n-propynyl, isopropynyl, n-butynyl, isobutynyl, octynyl,
decynyl, and the like. Generally, although again not necessarily,
alkynyl groups herein contain 2 to about 12 carbon atoms. The term
"lower alkynyl" intends an alkynyl group of two to six carbon
atoms, preferably three or four carbon atoms. "Substituted alkynyl"
refers to alkynyl substituted with one or more substituent groups,
and the terms "heteroatom-containing alkynyl" and "heteroalkynyl"
refer to alkynyl in which at least one carbon atom is replaced with
a heteroatom.
[0064] "Alkoxy" as used herein refers to an alkyl group bound
through an ether linkage; that is, an "alkoxy" group may be
represented as --O-alkyl where alkyl is as defined above. A "lower
alkoxy" group intends an alkoxy group containing one to six, more
preferably one to four, carbon atoms.
[0065] "Allenyl" is used herein in the conventional sense to refer
to the group --CH.dbd.C.dbd.CH.sub.2. An "allenyl" group may be
unsubstituted or substituted with one or more non-hydrogen
substituents.
[0066] "Anomer" as used herein means one of a pair of isomers of a
cyclic carbohydrate resulting from creation of a new point of
symmetry when a rearrangement of atoms occurs at an aldehyde or
ketone position.
[0067] "Halo" and "halogen" are used in the conventional sense to
refer to a chloro, bromo, fluoro or iodo substituent. The terms
"haloalkyl," "haloalkenyl" or "haloalkynyl" (or "halogenated
alkyl," "halogenated alkenyl," or "halogenated alkynyl") refer to
an alkyl, alkenyl or alkynyl group, respectively, in which at least
one of the hydrogen atoms in the group has been replaced with a
halogen atom.
[0068] "Heterocycle" or "heterocyclic" refers to a carbocylic ring
wherein one or more carbon atoms have been replaced with one or
more heteroatoms such as nitrogen, oxygen or sulfur. Examples of
heterocycles include, but are not limited to, furan, thiphene,
pyrrole, pyrroline, pyrrolidine, dioxolane, oxazole, thiazole,
imidazole, imidazolie, imidazolidine, pyrazole, pyrazoline,
pyrazolidine, oxadiazole, triazole, thiadiazole, pyran, pyridine,
piperidine, dioxane, morpholine, dithiane, thiomorpholine,
pyridazine, pyrimidine, pyrazine, piperazine, triazine, trithiane,
naphthalene, quinolone, purine, indole, benzofuran, or
benzothiophene.
[0069] "Heteroatom-containing" refers to a molecule or molecular
fragment in which one or more carbon atoms is replaced with an atom
other carbon, e.g., nitrogen, oxygen, sulfur, phosphorus or
silicon.
[0070] "Substituted heterocycle" refers to a heterocycle as just
described that contains one or more functional groups such as lower
alkyl, acyl, aryl, cyano, halogen, hydroxy, alkoxy, alkoxyalkyl,
amino, alkyl and dialkyl amino, acylamino, acyloxy, aryloxy,
aryloxyalkyl, carboxyalkyl, carboxamido, thio, thioethers, both
saturated and unsaturated cyclic hydrocarbons, heterocycles and the
like. In other instances where the term "substituted" is used, the
substituents which fall under this definition may be readily
gleaned from the other definitions of substituents which are
presented in the specification as well the circumstances under
which such substituents occur in a given chemical compound.
[0071] "Substituted" as in "substituted alkyl" or "substituted
alkenyl" means that in the hydrocarbyl, hydrocarbylene, alkyl,
alkenyl or other moiety, at least one hydrogen atom bound to a
carbon atom is replaced with one or more substituents that are
functional groups such as hydroxyl, alkoxy, thio, amino, halo,
silyl, and the like. When the term "substituted" appears prior to a
list of possible substituted groups, it is intended that the term
apply to every member of that group.
[0072] "Effective amount" refers to the amount of a selected
compound, intermediate, or reactant that is used to produce an
intended result. The precise amount of a compound, intermediate, or
reactant used will vary depending upon the particular compound
selected and its intended use, the age and weight of the subject,
route of administration, and so forth, but may be easily determined
by routine experimentation. In the case of the treatment of a
condition or disease state, an effective amount is that amount
which is used to effectively treat the particular condition or
disease state.
[0073] The term "subjects" is used throughout the specification to
describe an animal, preferably a human, to whom treatment,
including prophylactic treatment, with the compositions according
to the present invention is provided.
[0074] The compositions of the present invention may be formulated
in a conventional manner using one or more pharmaceutically
acceptable carriers. Pharmaceutically acceptable carriers that may
be used in these pharmaceutical compositions include, but are not
limited to, ion exchangers, alumina, aluminum stearate, lecithin,
serum proteins, such as human serum albumin, buffer substances such
as phosphates, glycine, sorbic acid, potassium sorbate, partial
glyceride mixtures of saturated vegetable fatty acids, water, salts
or electrolytes, such as prolamine sulfate, disodium hydrogen
phosphate, potassium hydrogen phosphate, sodium chloride, zinc
salts, colloidal silica, magnesium trisilicate, polyvinyl
pyrrolidone, cellulose-based substances, polyethylene glycol,
sodium carboxymethylcellulose, polyacrylates, waxes,
polyethylene-polyoxypropylene-block polymers, polyethylene glycol
and wool fat.
[0075] The compositions of the present invention may be
administered orally, parenterally, by inhalation spray, topically,
rectally, nasally, buccally, vaginally or via an implanted
reservoir. The term "parenteral" as used herein includes
subcutaneous, intravenous, intramuscular, intra-articular,
intra-synovial, intrasternal, intrathecal, intrahepatic,
intralesional and intracranial injection or infusion techniques.
Preferably, the compositions are administered orally,
intraperitoneally, or intravenously.
[0076] Sterile injectable forms of the compositions of this
invention may be aqueous or oleaginous suspension. These
suspensions may be formulated according to techniques known in the
art using suitable dispersing or wetting agents and suspending
agents. The sterile injectable preparation may also be a sterile
injectable solution or suspension in a non-toxic
parenterally-acceptable diluent or solvent, for example as a
solution in 1,3-butanediol. Among the acceptable vehicles and
solvents that may be employed are water, Ringer's solution and
isotonic sodium chloride solution. In addition, sterile, fixed oils
are conventionally employed as a solvent or suspending medium. For
this purpose, any bland fixed oil may be employed including
synthetic mono- or di-glycerides. Fatty acids, such as oleic acid
and its glyceride derivatives are useful in the preparation of
injectables, as are natural pharmaceutically-acceptable oils, such
as olive oil or castor oil, especially in their polyoxyethylated
versions. These oil solutions or suspensions may also contain a
long-chain alcohol diluent or dispersant, such as Ph. Helv or
similar alcohol.
[0077] The pharmaceutical compositions of this invention may be
orally administered in any orally acceptable dosage form including,
but not limited to, capsules, tablets, aqueous suspensions or
solutions. In the case of tablets for oral use, carriers that are
commonly used include lactose and corn starch. Lubricating agents,
such as magnesium stearate, are also typically added. For oral
administration in a capsule form, useful diluents include lactose
and dried cornstarch. When aqueous suspensions are required for
oral use, the active ingredient is combined with emulsifying and
suspending agents. If desired, certain sweetening, flavoring or
coloring agents may also be added.
[0078] Alternatively, the pharmaceutical compositions of this
invention may be administered in the form of suppositories for
rectal administration. These can be prepared by mixing the agent
with a suitable non-irritating excipient that is solid at room
temperature but liquid at rectal temperature and therefore will
melt in the rectum to release the drug. Such materials include
cocoa butter, beeswax and polyethylene glycols.
[0079] The pharmaceutical compositions of this invention may also
be administered topically, especially when the target of treatment
includes areas or organs readily accessible by topical application,
including diseases of the eye, the skin, or the lower intestinal
tract. Suitable topical formulations are readily prepared for each
of these areas or organs.
[0080] Topical application for the lower intestinal tract can be
effected in a rectal suppository formulation (see above) or in a
suitable enema formulation. Topically-transdermal patches may also
be used.
[0081] For topical applications, the pharmaceutical compositions
may be formulated in a suitable ointment containing the active
component suspended or dissolved in one or more carriers. Carriers
for topical administration of the compounds of this invention
include, but are not limited to, mineral oil, liquid petrolatum,
white petrolatum, propylene glycol, polyoxyethylene,
polyoxypropylene compound, emulsifying wax and water.
Alternatively, the pharmaceutical compositions can be formulated in
a suitable lotion or cream containing the active components
suspended or dissolved in one or more pharmaceutically acceptable
carriers. Suitable carriers include, but are not limited to,
mineral oil, sorbitan monostearate, polysorbate 60, cetyl esters
wax, cetearyl alcohol, 2-octyldodecanol, benzyl alcohol and
water.
[0082] For ophthalmic use, the pharmaceutical compositions may be
formulated as micronized suspensions in isotonic, pH adjusted
sterile saline, or, preferably, as solutions in isotonic, pH
adjusted sterile saline, either with or without a preservative such
as benzylalkonium chloride. Alternatively, for ophthalmic uses, the
pharmaceutical compositions may be formulated in an ointment such
as petrolatum.
[0083] The pharmaceutical compositions of this invention may also
be administered by nasal aerosol or inhalation. Such compositions
are prepared according to techniques well-known in the art of
pharmaceutical formulation and may be prepared as solutions in
saline, employing benzyl alcohol or other suitable preservatives,
absorption promoters to enhance bioavailability, fluorocarbons,
and/or other conventional solubilizing or dispersing agents.
[0084] The amount of a novel NPYY2 inhibitor of the instant
invention that may be combined with the carrier materials to
produce a single dosage form will vary depending upon the host
treated, and the particular mode of administration. Preferably, the
compositions should be formulated to contain between about 10
milligrams to about 500 milligrams of active ingredient.
[0085] It should also be understood that a specific dosage and
treatment regimen for any particular patient will depend upon a
variety of factors, including the activity of the specific compound
employed, the age, body weight, general health, sex, diet, time of
administration, rate of excretion, drug combination, and the
judgment of the treating physician and the severity of the
particular disease or condition being treated.
[0086] Compounds of the invention are potent, non-peptidic, low
molecular weight, selective NPY Y2 inhibitors and are useful in the
treating or preventing: anxiolytic disorders and depression;
injured mammalian nerve tissue; conditions responsive to treatment
through administration of a neurotrophic factor; neurological
disorders; bone loss; substance related disorders; and metabolic
disorders such as obesity or an obesity-related disorder. Compounds
of the invention modulate endocrine functions; particularly those
controlled by the pituitary and hypothalamic glands, and therefore
may be used to treat inovulation and infertility that may be due to
insufficient release of luteinizing hormone (LH) or luteal phase
defect.
[0087] The compounds compete with the endogenous ligands NPY and
possibly non-endogenous ligands, and bind to the NPY2 receptor. In
addition, the compounds demonstrate antagonist activity by
antagonizing the action of NPY upon binding to the Y2 receptor. The
compounds described herein are ligands of the NPY2 receptor, but
are not necessarily limited solely in their pharmacological or
biological action due to binding to this or any neuropeptide,
neurotransmitter or G-protein coupled receptor. For example, the
described compounds may also undergo binding to dopamine or
serotonin receptors.
[0088] "Anxiolytic disorders" include affective disorders such as
all types of depression, bipolar disorder, cyclothymia, and
dysthymia, anxiety disorders such as generalized anxiety disorder,
panic, phobias and obsessive-compulsive disorder, stress disorders
including post-traumatic stress disorder, hemorrhagic stress,
stress-induced psychotic episodes, psychosocial dwarfism, stress
headaches, stress-induced immune systems disorders such as
stress-induced fever, and stress-related sleep disorders, and can
include eating disorders such as anorexia nervosa, bulimia nervosa,
and obesity, and drug addiction.
[0089] "Depression" refers to major depressive disorders,
dysthymia, bipolar or manic disorders, and the like.
[0090] "Nerve tissue" as used herein refers to any vertebrate nerve
tissue, particularly including mammalian cells of the central
nervous system (CNS) and peripheral nervous system (PNS). More
particularly, nerve tissue includes spinal cord neuronal
structures, peripheral nervous system nerves, and even nerve cells
of the brain.
[0091] "Nerve tissue injury", "injured mammalian nerve tissue", or
"CNS or PNS nerve tissue injury" include any damage to relevant
nerve tissue irrespective of cause, e.g., injuries attributable to
trauma including but not limited to nerve tissue lesions,
traumatically-induced compression, tumors, hemorrhage, infectious
processes, spinal stenosis, or impaired blood supply.
[0092] "Treating injured mammalian nerve tissue" includes, but is
not limited, to the in vivo administration of compounds,
compositions, and methods of the instant invention to restore
action potential or nerve impulse conduction through a nerve tissue
lesion. The term may also include such administration in an effort
to reduce the damaging effects of any injury to mammalian nerve
tissue, whether through restoration of action potential or nerve
impulse conduction, by stimulating growth or proliferation of
nervous tissue, by ameliorating unwanted conditions in the
extracellular microenvironment near an injury, or otherwise.
[0093] "Neurotrophic factor", as used herein, refers to compounds
that are capable of stimulating growth or proliferation of nervous
tissue, including compounds of the instant invention and known
neurotrophic factors described previously herein.
[0094] "Neurological disorders" include CNS disorders such as
tinitus, spasticity, and neuropathic pain, supranuclear palsy, AIDS
related dementias, multiinfarct dementia, neurodegenerative
disorders such as Alzheimer's disease, Parkinson's disease, and
Huntington's disease, head trauma, spinal cord trauma, ischemic
neuronal damage, amyotrophic lateral sclerosis, and disorders of
pain perception such as fibromyalgia and epilepsy.
[0095] "Bone loss" refers to enhancement of bone growth or
prevention of bone loss caused by conditions such as osteoporosis,
osteomalacia, Paget's disease, disorders of bone homeostasis, and
the like.
[0096] "Substance related disorders" refer to misuse, addiction, or
dependence disorders related to the consumption of alcohol,
amphetamines, cannabis, hallucinogens, inhalants, nicotine,
opioids, phencyclidine, or sedatives.
[0097] "Obesity" refers to a condition in which a subject has a
body mass index of greater than or equal to 30. "Over-weight"
refers to a condition in which a subject has a body mass index of
greater or equal to 25.0. The body mass index and other definitions
are according to the "NIH Clinical Guidelines on the Identification
and Evaluation, and Treatment of Overweight and Obesity in Adults"
(1998).
[0098] "Obesity-related disorder" includes anorexia nervosa,
wasting, AIDS-related weight loss, bulimia, cachexia, lipid
disorders including hyperlipidemia and hyperuricemia, insulin
resistance, noninsulin dependent diabetes mellitus (NIDDM, or Type
II diabetes), insulin dependent diabetes mellitus (IDDM or Type I
diabetes), diabetes-related complications including
microangiopathic lesions, ocular lesions, retinopathy, neuropathy,
and renal lesions, cardiovascular disease including cardiac
insufficiency, coronary insufficiency, and high blood pressure,
atherosclerosis, atheromatous disease, stroke, hypertension,
Syndrome X, gallbladder disease, osteoarthritis, sleep apnea, forms
of cancer such as uterine, breast, colorectal, kidney, and
gallbladder, high cholesterol levels, complications of pregnancy,
menstrual irregularities, hirsutism, muscular dystrophy,
infertility, and increased surgical risk.
EXAMPLES
[0099] In order to illustrate the invention, the following examples
are included. These examples do not limit the invention. They are
only meant to suggest a method of practicing the invention. Those
skilled in the art may find other methods of practicing the
invention, which are obvious to them. However, those methods are
deemed to be within the scope of this invention. Unless otherwise
noted, the materials used in the examples were obtained from
readily available commercial sources or synthesized by standard
methods known to those skilled in the art.
Protocol for Preparative Reversed-Phase HPLC
Gilson.RTM. Liquid Chromatograph
Column: YMC-Pack ODS-A, 5 .mu.m, 75.times.30 mm
[0100] Flow rate: 10 mL/min
Detection: .lamda.=220 & 254 nm
[0101] Mobile Phase: (10 to 95% acetonitrile/water, 0.05%
trifluoroacetic acid)
Protocol for LC/MS (Reversed-Phase)
Hewlett Packard Series 1100
Column: Agilent ZORBAX.RTM. C8, 5 .mu.m, 4.6.times.150 mm
[0102] Flow rate: 1 mL/min
Detection: .lamda.=220 & 254 nm
Ionization Method: ESI
[0103] Gradient: acetonitrile/water, 0.05% trifluoroacetic acid
[0104] Mass spectra were obtained on an Agilent series 1100 MSD
using electrospray ionization (ESI) in either positive or negative
modes as indicated. Preparative thin-layer chromatography was
performed using Merck silica gel 60 F.sub.254 plates measuring 20
cm.times.20 cm.times.0.5 mm.
[0105] NMR spectra were obtained on either a Bruker model DPX400
(400 MHz) or DPX500 (500 MHz) spectrometer. The format of the
.sup.1H NMR data below is: chemical shift in ppm down field of the
tetramethylsilane reference (multiplicity, coupling constant J in
Hz, integration).
Example 1
##STR00011##
[0106]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-phenyl-acrylamide
[0107] To a solution of
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(250 mg, 0.72 mmol) in CH.sub.2Cl.sub.2 (10 mL) was added cinnamoyl
chloride (160 mg, 0.93 mmol) and triethylamine (TEA, 0.30 mL, 2.2
mmol). The mixture was stirred at 25.degree. C. for 16 h. After
concentration, the residue was purified by preparative TLC (PTLC,
20% EtOAc/CH.sub.2Cl.sub.2) to provide 290 mg (85%) of the desired
product. .sup.1H NMR (500 MHz, CDCl.sub.3): 8.05 (s, 1H), 7.62 (d,
J=15.5 Hz, 1H), 7.32-7.20 (m, 10H), 7.17 (d, J=7.9 Hz, 1H), 6.74
(dd, J=6.8, 1.5 Hz, 1H), 6.15 (d, J=15.5 Hz, 1H), 4.80-4.69 (m,
1H), 4.20-4.09 (m, 3H), 3.51-3.45 (m, 1H), 3.31-3.20 (m, 2H),
2.95-2.82 (m, 2H), 2.23 (s, 3H), 2.19-2.08 (m, 2H), 1.91-1.71 (m,
2H). MS: exact mass calculated for C.sub.31H.sub.33N.sub.3O.sub.2,
479.26; m/z found, 480.3 [M+H].sup.+.
Example 2
##STR00012##
[0108]
trans-N-(1-Benzyl-piperidin-4-yl)-N-(2,3-dihydro-1H-indol-6-yl)-3-p-
henyl-acrylamide
Step A. 6-Amino-2,3-dihydro-indole-1-carboxylic acid tert-butyl
ester
[0109] To a mixture of 6-nitroindoline (2 mmol) and TEA (2.2 mmol)
in CH.sub.2Cl.sub.2 (20 mL) was added di-tert-butyl dicarbonate (2
mmol). The mixture was stirred at 25.degree. C. for 16 h. The
mixture was washed with satd. aq. NaHCO.sub.3 (20 mL) and brine (20
mL), and then was dried and concentrated. The residue was dissolved
in MeOH (4 mL), and FeCl.sub.3.6H.sub.2O (7 mg), Me.sub.2NNH.sub.2
(21 mmol), and charcoal (50 mg) were added. The resulting mixture
was heated at reflux for 4 h. The mixture was filtered through
diatomaceous earth and the filtrate was concentrated to obtain the
desired compound in quantitative yield.
Step B.
6-(1-Benzyl-piperidin-4-ylamino)-2,3-dihydro-indole-1-carboxylic
acid tert-butyl ester
[0110] 1-Benzyl-4-piperidone (1 mmol) was stirred with
6-amino-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester (1.2
mmol), Na(OAc).sub.3BH (1.3 mmol) and AcOH (1 mmol) in
CH.sub.2Cl.sub.2 (20 mL). The resulting mixture was stirred at
25.degree. C. for 16 h. The mixture was washed with satd. aq.
NaHCO.sub.3 (20 mL), and the organic layer was dried and
concentrated to provide the crude desired compound.
Step C.
trans-6-[(1-Benzyl-piperidin-4-yl)-(3-phenyl-acryloyl)-amino]-2,3--
dihydro-indole-1-carboxylic acid tert-butyl ester
[0111] To a solution of the product of Step B (1 mmol) in
CH.sub.2Cl.sub.2 (10 mL) was added cinnamoyl chloride (1 mmol) and
TEA (1.1 mmol). The resulting mixture was stirred at 25.degree. C.
for 16 h. The mixture was washed with satd aq. NaHCO.sub.3 (20 mL),
and the organic layer was dried and concentrated. After
purification by silica gel chromatography, the desired compound was
obtained (60%).
Step D
[0112] To a solution of the product of Step C (1 mmol) in
CH.sub.2Cl.sub.2 (10 mL) was added TFA (1 mL). The mixture was
stirred at 25.degree. C. for 16 h. After concentration, the title
compound was obtained as its TFA salt in quantitative yield.
.sup.1H NMR (500 MHz, CDCl.sub.3): 9.78 (s, 1H), 7.65 (d, J=15.5
Hz, 1H), 7.46-7.23 (m, 12H), 7.08 (d, J=8.3 Hz, 1H), 6.13 (d,
J=15.5 Hz, 1H), 4.99-4.95 (br m, 1H), 4.15-3.95 (m, 4H), 3.40-3.31
(m, 4H), 3.02-2.88 (br m, 2H), 2.11-1.56 (m, 4H). MS: exact mass
calculated for C.sub.29H.sub.31N.sub.3O, 437.25; m/z found, 438.3
[M+H].sup.+.
Example 3
##STR00013##
[0113]
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1-formyl-2,3-dihydro-1H-indol--
6-yl)-3-phenyl-acrylamide
[0114] To a solution of the compound prepared in Example 2 (24 mg,
0062 mmol) in acetonitrile (2 mL) was added formic acid (2.2 .mu.L,
0.060 mmol) and 1,1'-carbonyldiimidazole (11 mg, 0.060 mmol). The
mixture was stirred at 25.degree. C. for 16 h. After concentration,
the residue was purified by PTLC (20% EtOAc/CH.sub.2Cl.sub.2) to
give the title compound (10 mg, 39%). .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.88 (s, 0.75H), 8.52 (s, 0.25H), 7.66 (d, J=15.6 Hz,
1H), 7.33-7.21 (m, 12H), 6.78 (dd, J=6.2, 1.7 Hz, 1H), 6.14-6.11
(m, 1H), 4.77-4.72 (m, 1H), 4.22-4.13 (m, 2H), 3.47-3.45 (m, 2H),
3.27-3.19 (m, 2H), 3.00-2.82 (br m, 2H), 2.17-2.13 (br m, 2H),
1.84-1.78 (m, 2H), 1.50-1.44 (m, 2H). MS: exact mass calculated for
C.sub.30H.sub.31N.sub.3O.sub.2, 465.24; m/z found, 466.2
[M+H].sup.+.
Example 4
##STR00014##
[0115]
trans-N-(1-Benzyl-piperidin-4-yl)-N-[1-(3-oxo-butyryl)-2,3-dihydro--
1H-indol-6-yl]-3-phenyl-acrylamide
[0116] To a solution of the compound prepared in Example 2 (41 mg,
0.092 mmol) in CH.sub.2Cl.sub.2 (3 mL) was added TEA (1.5 .mu.L,
0.010 mmol) and diketene (8.1 .mu.L, 0.10 mmol). The mixture was
stirred at 25.degree. C. for 16 h. After concentration, the residue
was purified by PTLC (20% EtOAc/CH.sub.2Cl.sub.2) to give the title
compound (26 mg, 53%). .sup.1H NMR (500 MHz, CDCl.sub.3): 8.04 (s,
1H), 7.65-7.61 (m, 1H), 7.30-7.16 (m, 12H), 6.79-6.72 (m, 1H),
6.18-6.11 (m, 1H), 4.76-4.71 (m, 1H), 4.20-4.10 (m, 2H), 3.45 (s,
2H), 3.35-3.25 (m, 2H), 2.95-2.85 (m, 2H), 2.34 (s, 3H), 2.25-2.10
(m, 2H), 2.00-1.85 (br m, 1H), 1.85-1.75 (br m, 1H), 1.65-1.50 (m,
1H), 1.53-1.40 (m, 1H). MS: exact mass calculated for
C.sub.33H.sub.35N.sub.3O.sub.3, 521.27; m/z found, 522.2
[M+H].sup.+.
Example 5
##STR00015##
[0117]
trans-{6-[(1-Benzyl-piperidin-4-yl)-(3-phenyl-acryloyl)-amino]-2,3--
dihydro-indol-1-yl}-oxo-acetic acid ethyl ester
[0118] To a solution of the compound prepared in Example 2 (48 mg,
0.11 mmol) in CH.sub.2Cl.sub.2 (3 mL) was added pyridine (18 .mu.L,
0.22 mmol), 4-(dimethylamino)-pyridine (DMAP, 1.2 mg, 0.010 mmol),
and chloro-oxo-acetic acid ethyl ester (25 .mu.L, 0.22 mmol). The
mixture was stirred at 25.degree. C. for 16 h. After concentration,
the residue was purified by PTLC (20% EtOAc/CH.sub.2Cl.sub.2) to
give the title compound (15 mg, 36%). .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.64 (d, J=15.5 Hz, 1H), 7.28-7.19 (m,
10H), 7.03 (dd, J=8.1, 1.8 Hz, 1H), 6.13 (d, J=15.5 Hz, 1H),
4.75-4.72 (m, 1H), 4.40-4.32 (m, 4H), 3.45-3.44 (m, 2H), 3.28 (q,
J=7.8 Hz, 2H), 2.94-2.82 (br m, 2H), 2.13 (t, J=7.8 Hz, 2H),
1.88-1.86 (br m, 1H), 1.79-1.77 (br m, 1H), 1.59-1.48 (m, 1H),
1.43-1.38 (m, 4H). MS: exact mass calculated for
C.sub.33H.sub.35N.sub.3O.sub.4, 537.26; m/z found, 538.3
[M+H].sup.+.
Example 6
##STR00016##
[0119]
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1-methyl-2,3-dihydro-1H-indol--
6-yl)-3-phenyl-acrylamide
Step A. 1-Methyl-2,3-dihydro-1H-indol-6-ylamine
[0120] 6-Nitroindoline (2 mmol) was combined with methyl iodide
(2.2 mmol), n-Bu.sub.4l (7.4 mg, 0.020 mmol), and K.sub.2CO.sub.3
(350 mg, 2.5 mmol) in acetone (10 mL). The mixture was stirred at
25.degree. C. for 16 h. The mixture was partitioned between
CH.sub.2Cl.sub.2 and satd. aq. NaHCO.sub.3 (20 mL), and the organic
layer was dried and concentrated. Purification by silica gel
chromatography provided 1-methyl-6-nitroindoline (300 mg, 84%). To
a solution of 1-methyl-6-nitroindoline (194 mg, 1.15 mmol) in MeOH
(2 mL) was added FeCl.sub.3.6H.sub.2O (3 mg), Me.sub.2NNH.sub.2
(0.80 mL, 11 mmol), and charcoal (25 mg). The mixture was heated at
reflux for 4 h. The mixture was filtered through diatomaceous
earth, and the filtrate was concentrated to provide the desired
compound in quantitative yield.
Step B.
(1-Benzyl-piperidin-4-yl)-(1-methyl-2,3-dihydro-1H-indol-6-yl)-ami-
ne
[0121] The product from Step A (161 mg, 1.1 mmol) was converted to
the desired compound as in Example 2, Step B.
Step C.
[0122] The title compound (80 mg, 35%) was prepared as in Example
2, Step C. .sup.1H NMR (500 MHz, CDCl.sub.3): 7.63 (d, J=15.5 Hz,
1H), 7.30-7.25 (m, 10H), 7.02 (d, J=7.4 Hz, 1H), 6.38-6.36 (d,
J=8.8 Hz, 1H), 6.25 (d, J=15.5 Hz, 1H), 6.14 (s, 1H), 4.73-4.68 (m,
1H), 3.46-3.34 (m, 4H), 3.02-2.86 (m, 4H), 2.73 (s, 3H), 2.17-2.12
(m, 2H), 1.86-1.77 (m, 2H), 1.61-1.51 (m, 2H). MS: exact mass
calculated for C.sub.30H.sub.33N.sub.3O, 451.26; m/z found, 452.2
[M+H].sup.+.
Example 7
##STR00017##
[0123]
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1-methanesulfonyl-2,3-dihydro--
1H-indol-6-yl)-3-phenyl-acrylamide
Step A. 1-Methanesulfonyl-6-nitro-2,3-dihydro-1H-indole
[0124] To a solution of 6-nitroindoline (2 mmol) in
CH.sub.2Cl.sub.2 (10 mL) was added pyridine (180 .mu.L, 2.2 mmol),
DMAP (0.1 mmol), and methanesulfonyl chloride (170 .mu.L, 2.2
mmol). The resulting mixture was stirred at 25.degree. C. for 16 h.
The mixture was then washed with satd. aq. NaHCO.sub.3 (20 mL), and
the organic layer was dried and concentrated. Purification by
silica gel chromatography provided the desired compound (410 mg,
85%).
Step B. 1-Methanesulfonyl-2,3-dihydro-1H-indol-6-ylamine
[0125] To a solution of 1-methanesulfonyl-6-nitroindoline (240 mg,
1.0 mmol) in MeOH (2 mL) was added with FeCl.sub.3.6H.sub.2O (3
mg), Me.sub.2NNH.sub.2 (0.80 mL, 11 mmol), and charcoal (25 mg).
The mixture was heated at reflux for 4 h. After filtration through
a pad of diatomaceous earth, the filtrate was concentrated to
obtain the title compound in quantitative yield.
Step C.
(1-Benzyl-piperidin-4-yl)-(1-methanesulfonyl-2,3-dihydro-1H-indol--
6-yl)-amine
[0126] The crude title compound was prepared from the product from
Step B (420 mg, 1.1 mmol) as in Example 2, Step B.
Step D
[0127] The title compound (77 mg, 50%) was prepared from the
product of Step C as in Example 2, Step C. .sup.1H NMR (500 MHz,
CDCl.sub.3): 7.63 (d, J=15.5 Hz, 1H), 7.29-7.18 (m, 12H), 6.73 (dd,
J=8.3, 1.8 Hz, 1H), 6.10 (d, J=15.5 Hz, 1H), 4.79-4.71 (m, 1H),
4.04 (q, J=9.3 Hz, 1H), 3.45 (s, 2H), 3.19 (q, J=8.2 Hz, 1H),
2.91-2.89 (br m, 2H), 2.81 (s, 3H), 2.16-2.14 (br m, 2H) 1.89-1.78
(br m, 2H), 1.55-1.40 (br m, 2H). MS: exact mass calculated for
C.sub.30H.sub.33N.sub.3O.sub.3S, 515.22; m/z found, 516.3
[M+H].sup.+.
Example 8
##STR00018##
[0128]
trans-N-(1-Benzyl-piperidin-4-yl)-3-phenyl-N-[1-(2,2,2-trifluoro-ac-
etyl)-2,3-dihydro-1H-indol-6-yl]-acrylamide
[0129] To a solution of the compound prepared in Example 2 (48 mg,
0.11 mmol) in CH.sub.2Cl.sub.2 (3 mL) was added
1,3-dicyclohexylcarbodiimide (23 mg, 0.11 mmol) and TFA (13 mg,
0.11 mmol). The mixture was stirred at 25.degree. C. for 16 h.
After concentration, the residue was purified by PTLC (20%
EtOAc/CH.sub.2Cl.sub.2) to give the title compound (24 mg, 41%).
.sup.1H NMR (500 MHz, CDCl.sub.3): 7.65 (d, J=15.5 Hz, 1H),
7.29-7.23 (m, 11H), 6.92-6.90 (d, J=8.5 Hz, 1H), 6.12 (d, J=15.5
Hz, 1H), 4.79-4.74 (m, 1H), 4.38 (t, J=7.6 Hz, 1H), 3.46 (s, 2H),
3.33 (q, J=7.8 Hz, 2H), 3.00-2.82 (br m, 2H), 2.14 (t, J=11.4 Hz,
1H) 1.90-1.78 (m, 2H), 1.54-1.41 (m, 2H). MS: exact mass calculated
for C.sub.31H.sub.30F.sub.3N.sub.3O.sub.2, 533.58; m/z found, 534.2
[M+H].sup.+.
Example 9
##STR00019##
[0130] trans-N-(1-Acetyl-1,2,3,4-tetrahydro-quinol
in-7-yl)-N-(1-benzyl-piperidin-4-yl)-3-phenyl-acrylamide
Step A. 7-Amino-3,4-dihydro-2H-quinoline-1-carboxylic acid
tert-butyl ester
[0131] 7-Nitro-1,2,3,4-tetrahydroquinoline (280 mg, 1.0 mmol) was
converted to the desired compound (100%) as in Example 2, Step
A.
Step B.
7-(1-Benzyl-piperidin-4-ylamino)-3,4-dihydro-2H-quinoline-1-carbox-
ylic acid tert-butyl ester
[0132] The product from Step A (250 mg, 1.0 mmol) was converted to
the desired compound (210 mg, 50%) as in Example 2, Step B.
Step C.
N-(1-Benzyl-piperidin-4-yl)-3-phenyl-N-(1,2,3,4-tetrahydro-quinoli-
n-7-yl)-acrylamide
[0133] The product from Step B (110 mg, 0.25 mmol) was converted to
the desired compound (85 mg, 57%) as in Example 2, Step C.
Step D.
N-(1-Acetyl-1,2,3,4-tetrahydro-quinolin-7-yl)-N-(1-benzyl-piperidi-
n-4-yl)-3-phenyl-acrylamide
[0134] The desired compound (100%) was obtained as its TFA salt
from the product of Step C (85 mg) as in Example 2, Step D.
Step E
[0135] To a solution of the product from Step D (25 mg, 0.044 mmol)
in CH.sub.2Cl.sub.2 (10 mL) was added pyridine (7.0 .mu.L, 0.090
mmol), DMAP (0.5 mg, 4 .mu.mol), and acetyl chloride (6.3 .mu.L,
0.089 mmol). The mixture was stirred at 25.degree. C. for 16 h.
After concentration, the residue was purified by PTLC (20%
EtOAc/CH.sub.2Cl.sub.2) to give the title compound (11 mg, 50%).
.sup.1H NMR (500 MHz, CDCl.sub.3): 7.64 (d, J=15.5 Hz, 1H),
7.35-7.17 (m, 12H), 6.88-6.87 (br m, 1H), 6.13 (d, J=15.5 Hz, 1H),
4.77-4.72 (m, 1H), 3.92-3.80 (m, 1H), 3.80-3.69 (m, 1H), 3.49 (s,
2H), 2.94-2.92 (br m, 2H), 2.85-2.75 (br m, 2H), 2.24-2.10 (br m,
5H), 2.04-1.99 (m, 2H), 1.88-1.75 (br m, 2H), 1.58-1.44 (br m, 2H).
MS: exact mass calculated for C.sub.32H.sub.35N.sub.3O.sub.2,
493.27; m/z found, 494.2 [M+H].sup.+.
Example 10
##STR00020##
[0136]
trans-N-(1-Benzyl-piperidin-4-yl)-N-(2-oxo-2,3-dihydro-1H-indol-6-y-
l)-3-phenyl-acrylamide
Step A. 6-Nitro-1,3-dihydro-indol-2-one
[0137] To a solution of (2,4-dinitrophenyl)-acetic acid methyl
ester (5 mmol) in 50 mL of ethanol was added a suspension of 10%
Pd/C (0.12 g) in ethanol/dimethoxyethane (1:1). The mixture was
hydrogenated at 50 psi until hydrogen uptake ceased. The mixture
was filtered to remove the catalyst, and the filtrate was
concentrated. The residue was diluted with 10 mL of 1 M HCl and
heated at reflux for 20 min. The mixture was cooled to rt,
neutralized with 1 M NaOH to pH 7, and extracted with EtOAc
(3.times.). The organic layers were combined, dried over
Na.sub.2SO.sub.4, and concentrated to give the desired compound as
a semi-solid, which was used directly in the next step.
Step B
[0138] The title compound (75 mg, 31%) was prepared from the
product of Step A as in Example 2, Steps B and C. .sup.1H NMR (500
MHz, CDCl.sub.3): 9.39 (s, 1H), 7.65 (d, J=15.5 Hz, 1H), 7.32-7.14
(m, 10H), 7.04 (t, J=7.0 Hz, 1H), 6.71 (dd, J=7.8, 1.6 Hz, 1H),
6.14 (br s, 1H), 6.06 (d, J=15.5 Hz, 1H), 4.85-4.72 (m, 1H),
3.59-3.30 (m, 4H), 3.06-3.04 (br m, 1H), 2.85-2.83 (br m, 1H),
2.23-2.09 (m, 2H), 1.83-1.57 (m, 4H). MS: exact mass calculated for
C.sub.29H.sub.29N.sub.3O.sub.2, 451.23; m/z found, 452.2
[M+H].sup.+.
Example 11
##STR00021##
[0139]
trans-N-(1-Acetyl-1H-indol-6-yl)-N-(1-benzyl-piperidin-4-yl)-3-phen-
yl-acrylamide
Step A. 1H-Indol-6-ylamine
[0140] The desired compound (100%) was prepared from 6-nitroindole
(650 mg, 4.0 mmol) as in Example 7, Step B.
Step B. (1-Benzyl-piperidin-4-yl)-(1H-indol-6-yl)-amine
[0141] The desired compound (756 mg, 62%) was prepared from the
product from Step A (530 mg, 4.0 mmol) as in Example 2, Step B.
Step C.
trans-N-(1-Benzyl-piperidin-4-yl)-N-(1H-indol-6-yl)-3-phenyl-acryl-
amide
[0142] The desired compound (135 mg, 62%) was prepared from the
product from Step B (150 mg, 0.50 mmol) as in Example 2, Step
C.
Step D
[0143] To a solution of the product from Step C (80 mg, 0.2 mmol)
in THF (20 mL) was added NaH (95%, 8.8 mg, 0.37 mmol). After 10
min, acetyl chloride (26 .mu.L, 0.37 mmol) was added. The resulting
mixture was stirred at 25.degree. C. for 16 h. After concentration,
the residue was purified by PTLC (20% EtOAc/CH.sub.2Cl.sub.2) to
give the title compound (35 mg, 41%). .sup.1H NMR (500 MHz,
CDCl.sub.3): 7.63 (d, J=15.6 Hz, 1H), 7.57 (d, J=8.1 Hz, 1H), 7.52
(d, J=3.4 Hz, 1H), 7.34-7.12 (m, 11H), 7.03 (d, J=8.7 Hz, 1H), 6.71
(d, J=3.4 Hz, 1H), 6.09 (d, J=15.6 Hz, 1H), 4.81-4.78 (m, 1H), 3.44
(s, 2H), 2.91-2.87 (m, 2H), 2.65 (s, 3H), 2.20-2.05 (m, 1H),
1.94-1.92 (br m, 1H), 1.83-1.81 (br m, 1H), 1.57-1.41 (m, 3H). MS:
exact mass calculated for C.sub.31H.sub.31N.sub.3O.sub.2, 477.24;
m/z found, 478.3 [M+H].sup.+.
Example 12
##STR00022##
[0144]
N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin-4-yl)--
3-phenyl-propionamide
[0145]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-phenyl-acrylamide (Example 1, 0.6 g, 1 mmol) was dissolved
in 50 mL of MeOH and 20% Pd(OH).sub.2/C (21 mg) was added in
portions over the course of the reaction. The mixture was shaken in
a Parr hydrogenator at .about.50 psi overnight. The mixture was
filtered through a pad of diatomaceous earth. The filtrate was
concentrated to yield the crude product contaminated with
de-benzylated material. The mixture was purified by reverse-phase
HPLC to yield the desired product as its TFA salt as a light pink
powder (0.06 g, 8%). .sup.1H NMR (400 MHz, DMSO-d.sub.6): 9.13 (br
s, 1H), 7.80 (s, 1H), 7.45 (s, 5H), 7.32-7.09 (m, 4H), 7.06 (d,
J=9.1 Hz, 2H), 6.69 (dd, J=6.3, 2.4 Hz, 1H), 4.78-4.62 (m, 1H),
4.23 (d, J=9.2 Hz, 2H), 4.12 (q, J=8.8 Hz, 2H), 3.39-3.23 (m, 2H),
3.23-3.01 (m, 4H), 2.77 (t, J=8.7 Hz, 2H), 2.25-2.02 (m, 5H),
1.97-1.80 (m, 2H), 1.65-1.33 (m, 2H). MS: exact mass calculated for
C.sub.31H.sub.35N.sub.3O.sub.2, 481.27; m/z found, 482.3
[M+H].sup.+.
Example 13
##STR00023##
[0146] trans-2-Phenyl-cyclopropanecarboxylic acid
(1-acetyl-2,3-dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide
[0147] To a solution of
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(0.353 g, 1.01 mmol) in 50 mL of acetonitrile was added
diisopropylethylamine (0.193 mL, 1.11 mmol) and
trans-2-phenyl-1-cyclopropanecarbonyl chloride (90%, 0.174 mL, 1.01
mmol). The reaction mixture was stirred overnight, and then was
filtered through diatomaceous earth. The filtrate was evaporated
and the residue was chromatographed over silica gel
(acetone/MeOH/CH.sub.2Cl.sub.2) to provide the desired product as a
tan solid (0.30 g, 61%). .sup.1H NMR (400 MHz, CDCl.sub.3): 8.04
(s, 1H), 7.38-6.98 (m, 9H), 6.97-6.82 (m, 2H), 6.76 (dd, J=12.5,
6.2 Hz, 1H), 4.65 (br t, J=12.7 Hz, 1H), 4.12 (t, J=9.5 Hz, 1H),
4.09-3.87 (m, 1H), 3.44 (s, 2H), 3.26-3.07 (m, 2H), 2.97-2.79 (m,
2H), 2.51-2.47 (m, 1H), 2.29-1.98 (m, 5H), 1.92-1.66 (m, 2H),
1.65-1.29 (m, 4H), 1.08-0.96 (m, 1H). MS: exact mass calculated for
C.sub.32H.sub.35N.sub.3O.sub.2, 493.27; m/z found, 494.3
[M+H].sup.+.
Example 14
##STR00024##
[0148]
trans-1-{6-[(1-Benzyl-piperidin-4-yl)-(3-phenyl-allyl)-amino]-2,3-d-
ihydro-indol-1-yl}-ethanone
[0149]
1-[6-(1-Benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanon-
e (0.357 g, 1.02 mmol) was dissolved in acetonitrile (50 mL) with
stirring. Cinnamyl bromide (0.212 g, 1.08 mmol) was added and the
reaction was stirred for 3 days. Concentration of the reaction
mixture gave a residue that was chromatographed using reverse-phase
HPLC to provide the TFA salt of the desired product as a tan powder
(0.183 g, 31%). LC/MS analysis showed a nearly 1:1 mixture of
products, both showing the correct molecular ion. MS: 5 exact mass
calculated for C.sub.31H.sub.35N.sub.3O, 465.28; m/z found, 466.3
[M+H].sup.+.
Example 15
##STR00025##
[0150] trans-2-Phenyl-ethenesulfonic acid
(1-acetyl-2,3-dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide
[0151] A mixture of
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(0.10 g, 0.29 mmol), 2-phenyl-ethenesulfonyl chloride (87 mg, 0.43
mmol), and TEA (0.08 mL, 0.57 mmol) in CH.sub.2Cl.sub.2 (5 mL) was
stirred at rt for 20 h. The reaction mixture was concentrated, and
the residue was purified on silica gel (60-70% EtOAc/hexanes) to
afford the title compound (138 mg, 92%).
[0152] .sup.1H NMR (500 MHz, CDCl.sub.3): 8.12 (s, 1H), 7.50-7.48
(m, 2H), 7.43 (s, 1H), 7.41-7.39 (m, 3H), 7.25 (d, J=6.8 Hz, 2H),
7.20 (t, J=7.0 Hz, 3H), 7.15 (d, J=7.9 Hz, 1H), 6.91 (d, J=7.8 Hz,
1H), 6.86 (d, J=15.0 Hz, 1H), 4.13 (t, J=8.0 Hz, 2H), 3.98-3.40 (m,
1H), 3.41 (s, 2H), 3.20 (t, J=8.5 Hz, 2H), 2.87 (d, J=10.5 Hz, 2H),
2.20 (s, 3H), 2.06-2.02 (m, 2H), 1.88 (d, J=10.7 Hz, 2H), 1.61-1.55
(m, 2H). MS: exact mass calculated for
C.sub.30H.sub.33N.sub.3O.sub.3S, 515.22; m/z found, 516.3
[M+H].sup.+.
Example 16
##STR00026##
[0153] 3-Phenyl-propynoic acid
(1-acetyl-2,3-dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide
[0154] A mixture of phenyl-propynoic acid (220 mg, 1.5 mmol) and
thionyl chloride (3.0 mL) in toluene (3.0 mL) was heated at reflux
for 4 h. The reaction mixture was cooled to rt and the excess
thionyl chloride and toluene were removed under reduced pressure.
The resulting crude acid chloride was dissolved in CH.sub.2Cl.sub.2
(5 mL) and treated with
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(349 mg, 1.0 mmol) and TEA (0.28 mL, 2.0 mmol) at rt for 20 h. The
reaction mixture was concentrated, and the residue was purified on
silica gel (60-70% EtOAc/hexanes) to afford the title compound (402
mg, 84%). .sup.1H NMR (500 MHz, CDCl.sub.3): 8.12 (s, 1H),
7.28-7.18 (m, 9H), 7.09 (d, J=7.8 Hz, 2H), 6.86 (dd, J=8.0, 1.7 Hz,
1H), 4.65-4.59 (m, 1H), 4.13 (t, J=8.5 Hz, 2H), 3.44 (s, 2H), 3.24
(t, J=8.5 Hz, 2H), 2.89 (d, J=10.7 Hz, 2H), 2.22 (s, 3H), 2.10 (t,
J=10.8 Hz, 2H), 1.90-1.78 (m, 2H), 1.63-1.58 (m, 2H). MS: exact
mass calculated for C.sub.31H.sub.31N.sub.3O.sub.2, 477.24; m/z
found, 478.3 [M+H].sup.+.
Example 17
##STR00027##
[0155]
cis-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin-4--
yl)-3-phenyl-acrylamide
Step A.
{[(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-c-
arbamoyl]-methyl}-phosphonic acid
bis-(2,2,2-trifluoro-ethyl)ester
[0156] A mixture of
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(0.50 g, 1.4 mmol) and
[bis-(2,2,2-trifluoro-ethoxy)-phosphoryl]-acetic acid methyl ester
(910 mL, 4.3 mmol) was dissolved in 10 mL of xylenes and heated at
reflux for 12 h. The mixture was concentrated in vacuo and the
residue was purified by silica gel chromatography (EtOAc) to afford
468 mg (52%) of the desired intermediate as a yellow foam. .sup.1H
NMR (500 MHz, CDCl.sub.3): 7.97 (br s, 1H), 7.27-7.19 (m, 6H),
6.76-6.74 (m, 1H), 4.56-4.38 (m, 4H), 4.16-4.12 (m, 2H), 3.42 (s,
2H), 3.27-3.22 (m, 2H), 2.91-2.86 (m, 4H), 2.24 (s, 3H), 2.09-2.04
(m, 2H), 1.80-1.73 (m, 2H), 1.60 (br s, 1H), 1.47-1.39 (m, 2H). MS:
exact mass calculated for C.sub.28H.sub.32F.sub.6N.sub.3O.sub.5P,
635.20; m/z found, 636.2 [M+H].sup.+, 658.2 [M+Na].sup.+.
Step B
[0157] To a mixture of the product of Step A (0.100 g, 0.157 mmol)
and 18-crown-6 (208 mg, 0.787 mmol) in 1 mL of THF at -78.degree.
C. was added 314 .mu.L of potassium bis(trimethylsilyl)amide (0.5 M
in toluene) followed by benzaldehyde (16 mL, 0.157 mmol). After 30
min, the reaction was quenched by the addition of satd. aq.
NH.sub.4Cl and EtOAc. The organic layer was separated, dried over
Na.sub.2SO.sub.4, filtered, and concentrated in vacuo. The crude
material was purified by PTLC (70% EtOAc/hexanes) to afford 57 mg
(75%) of the title compound as a white foam. .sup.1H NMR (500 MHz,
CDCl.sub.3): 7.90 (s, 1H), 7.40 (d, J=5.0 Hz, 2H), 7.32-7.19 (m,
8H), 6.96 (d, J=6.9 Hz, 1H), 6.36 (d, J=8.7 Hz, 1H), 6.28 (d,
J=12.5 Hz, 1H), 5.78 (d, J=12.5 Hz, 1H), 4.67 (br s, 1H), 4.11-4.07
(m, 2H), 3.43 (s, 2H), 3.18 (br s, 2H), 2.87-2.85 (m, 2H), 2.20 (s,
3H), 2.13-2.08 (m, 2H), 1.79 (br s, 2H), 1.43 (br s, 2H). MS: exact
mass calculated for C.sub.31H.sub.33N.sub.3O.sub.2, 479.26; m/z
found, 480.2 [M+H].sup.+, 502.3 [M+Na].sup.+.
Example 18
##STR00028##
[0158] trans,trans-5-Phenyl-penta-2,4-dienoic acid
(1-acetyl-2,3-dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-amide
Step A.
{[(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-(1-benzyl-piperidin-4-yl)-c-
arbamoyl]-methyl}-phosphonic acid diethyl ester
[0159] A mixture of
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(2.5 g, 7.16 mmol), methyl diethylphosphonoacetate (4.0 mL, 21
mmol) and catalytic DMAP was suspended in 36 mL of m-xylenes and
heated at reflux for 48 h. The solution was concentrated in vacuo
and the residue was purified by silica gel chromatography (5%
MeOH/EtOAc) to afford 2.5 g (65%) of the desired intermediate.
.sup.1H NMR (500 MHz, CDCl.sub.3): 7.97 (br s, 1H), 7.27-7.15 (m,
6H), 6.80-6.79 (m, 1H), 4.62-4.60 (m, 1H), 4.21-4.06 (m, 6H), 3.41
(s, 2H), 3.23-3.20 (m, 2H), 2.84 (br s, 2H), 2.74-2.70 (m, 2H),
2.22 (s, 3H), 2.08-2.04 (m, 2H), 1.81-1.72 (m, 2H), 1.48-1.26 (m,
7H). MS: exact mass calculated for C.sub.28H.sub.38N.sub.3O.sub.5P,
527.25; m/z found, 528.3 [M+H].sup.+, 550.2 [M+Na].sup.+.
Step B
[0160] To a mixture of the product of Step A (157 mg, 0.309 mmol)
and LiCl (62.5 mg, 1.48 mmol) in 3.5 mL of acetonitrile was added
1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 40.4 .mu.L, 0.324 mmol)
followed by 3-phenyl-propenal (43 .mu.L, 0.34 mmol). The mixture
was stirred at rt for 12 h and then was diluted with satd. aq.
NH.sub.4C.sub.1 and CH.sub.2Cl.sub.2. The organic layer was
separated and washed with brine, dried over Na.sub.2SO.sub.4,
filtered and concentrated in vacuo. Purification by silica gel
chromatography (60% EtOAc/hexanes) afforded 125 mg (80%) of the
title compound. .sup.1H NMR (500 MHz, CDCl.sub.3): 8.01 (s, 1H),
7.41-7.17 (m, 10H), 6.80-6.60 (m, 5H), 5.74-5.71 (m, 1H), 4.73-3.68
(m, 1H), 4.16-4.11 (m, 2H), 3.44 (br s, 2H), 3.28-3.23 (m, 2H),
2.88 (br s, 2H), 2.23 (s, 3H), 2.14-2.10 (m, 2H), 1.86-1.76 (m,
2H), 1.63-1.42 (m, 2H).
Example 19
##STR00029##
[0161]
N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin-4-yl)--
acrylamide
[0162] The title compound (0.34 g, 83%), obtained as a pale yellow
glassy solid, was prepared from
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(0.350 g, 1.00 mmol) and acryloyl chloride (0.080 mL, 1.0 mmol) as
in Example 13. .sup.1H NMR (300 MHz, CDCl.sub.3): 7.98 (s, 1H),
7.34-7.12 (m, 6H), 6.72 (dd, J=9.1, 2.2 Hz, 1H), 6.31 (dd, J=15.3,
2.2 Hz, 1H), 5.88 (dd, J=12.5, 10.1 Hz, 1H), 5.43 (dd, J=10.1, 2.2
Hz, 1H), 4.77-4.61 (m, 1H), 4.13 (t, J=8.6 Hz, 2H), 3.44 (s, 2H),
3.24 (t, J=9.4 Hz, 2H), 2.88 (br d, J=10.2 Hz, 2H), 2.23 (s, 3H),
2.12 (t, J=12.5 Hz, 2H), 1.90-1.70 (br m, 2H), 1.60-1.35 (br m,
2H). MS: exact mass calculated for C.sub.25H.sub.29N.sub.3O.sub.2,
403.23; m/z found, 404.3 [M+H].sup.+.
Example 20
##STR00030##
[0163]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-thiophen-3-yl-acrylamide
[0164] To a mixture of trans-3-thiophen-3-yl-acrylic acid (66 mg,
0.43 mmol) and oxalyl chloride (45 .mu.L, 0.52 mmol) in 2 mL of
CH.sub.2Cl.sub.2 was added a catalytic amount of DMF. After
stirring at rt for 2 h, the mixture was concentrated in vacuo. The
resulting crude acid chloride was dissolved in CH.sub.2Cl.sub.2 and
treated with TEA (80 .mu.L, 0.58 mmol) and
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone
(0.100 g, 0.286 mmol). After stirring for 4 h, the mixture was
washed with satd. aq. NaHCO.sub.3 followed by brine. The organic
layer was dried over Na.sub.2SO.sub.4, filtered, and concentrated
in vacuo. Purification by silica gel chromatography (60%
EtOAc/hexanes) afforded 118 mg (64%) of the title compound. .sup.1H
NMR (500 MHz, CDCl.sub.3): 8.02 (br s, 1H), 7.83 (d, J=15.7 Hz,
1H), 7.39-7.16 (m, 8H), 6.94-6.93 (m, 1H), 6.73-6.72 (m, 1H), 5.97
(d, J=15.7 Hz, 1H), 4.74-4.70 (m, 1H), 4.17-4.13 (m, 2H), 3.45 (br
s, 2H), 3.28-3.23 (m, 2H), 2.88 (br s, 3H), 2.23 (s, 3H), 2.13 (m,
2H), 1.88-1.76 (m, 3H). MS: exact mass calculated for
C.sub.29H.sub.18N.sub.3O.sub.2, 485.21; m/z found, 486.2
[M+H].sup.+, 508.1 [M+Na].sup.+.
Example 21
##STR00031##
[0165]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-pyridin-2-yl-acrylamide
[0166] The title compound (186 mg, 88%) was as in Example 18 using
pyridine-2-carbaldehyde in place of 3-phenyl-propenal. .sup.1H NMR
(500 MHz, CDCl.sub.3): 8.47 (br s, 1H), 8.04 (s, 1H), 7.65-7.57 (m,
2H), 7.31-7.11 (m, 8H), 6.76-6.74 (m, 1H), 6.67 (d, J=15.3 Hz, 1H),
4.76-4.71 (m, 1H), 4.15-4.11 (m, 2H), 3.44 (s, 2H), 3.26-3.22 (m,
2H), 2.89 (br s, 2H), 2.21 (s, 3H), 2.15-2.10 (m, 2H), 1.90-1.76
(m, 2H), 1.62-1.42 (m, 2H). MS: exact mass calculated for
C.sub.30H.sub.32N.sub.4O.sub.2, 480.25; m/z found, 481.2
[M+H].sup.+, 503.2 [M+Na].sup.+.
Example 22
##STR00032##
[0167]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-pyridin-3-yl-acrylamide
[0168] The title compound (184 mg, 85%) was prepared as in Example
18 using pyridine-3-carbaldehyde in place of 3-phenyl-propenal.
.sup.1H NMR (500 MHz, CDCl.sub.3): 8.55-8.44 (m, 2H), 8.04 (s, 1H),
7.60-7.53 (m, 2H), 7.28-7.17 (m, 7H), 6.75-6.73 (m, 1H), 6.23 (d,
J=15.8 Hz, 1H), 4.74-4.69 (m, 1H), 4.18-4.13 (m, 2H), 3.44 (br s,
2H), 3.29-3.24 (m, 2H), 2.89 (br s, 2H), 2.23 (s, 3H), 2.15-2.10
(m, 2H), 1.88-1.78 (m, 2H), 1.55-1.44 (m, 2H). MS: exact mass
calculated for C.sub.30H.sub.32N.sub.4O.sub.2, 480.25; m/z found,
481.2 [M+H].sup.+, 503.2 [M+Na].sup.+.
Example 23
##STR00033##
[0169]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-pyridin-4-yl-acrylamide
[0170] The title compound (190 mg, 90%) was prepared as in Example
18 using pyridine-4-carbaldehyde in place of 3-phenyl-propenal.
.sup.1H NMR (500 MHz, CDCl.sub.3): 8.50-8.49 (m, 2H), 8.04 (s, 1H),
7.53 (d, J=15.5 Hz, 1H), 7.30-7.18 (m, 6H), 7.10-7.09 (m, 2H),
6.74-6.73 (m, 1H), 6.31 (d, J=15.5 Hz, 1H), 4.73-4.68 (m, 1H),
4.18-4.14 (m, 2H), 3.44 (s, 2H), 3.30-3.25 (m, 2H), 2.89 (br s,
2H), 2.24 (s, 3H), 2.15-2.10 (m, 2H), 1.88-1.77 (m, 2H), 1.54-1.43
(m, 2H).
[0171] MS: exact mass calculated for
C.sub.30H.sub.32N.sub.4O.sub.2, 480.25; m/z found, 481.2
[M+H].sup.+, 503.2 [M+Na].sup.+.
Example 24
##STR00034##
[0172]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(1-oxy-pyridin-4-yl)-acrylamide
[0173] The title compound (194 mg, 89%) was prepared as in Example
18 using 1-oxy-pyridine-4-carbaldehyde in place of
3-phenyl-propenal. .sup.1H NMR (500 MHz, CDCl.sub.3): 8.04-8.03 (m,
3H), 7.47 (d, J=15.5 Hz, 1H), 7.30-7.19 (m, 6H), 7.10-7.09 (m, 2H),
6.74-6.73 (m, 1H), 6.18 (d, J=15.5 Hz, 1H), 4.69 (br s, 1H),
4.18-4.14 (m, 2H), 3.44 (s, 2H), 3.30-3.25 (m, 2H), 2.88 (br s,
2H), 2.24 (s, 3H), 2.14-2.10 (m, 2H), 1.87-1.76 (m, 2H), 1.54-1.42
(m, 2H). MS: exact mass calculated for
C.sub.30H.sub.32N.sub.4O.sub.3, 496.25; m/z found, 497.2
[M+H].sup.+, 519.2 [M+Na].sup.+.
Example 25
##STR00035##
[0174]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(1H-imidazol-2-yl)-acrylamide
[0175] The title compound (154 mg, 75%) was prepared as in Example
18 using 1H-imidazole-2-carbaldehyde in place of 3-phenyl-propenal.
.sup.1H NMR (500 MHz, CDCl.sub.3): 7.98 (br s, 1H), 7.73 (d, J=15.3
Hz, 1H), 7.28-7.19 (m, 5H), 7.00-6.91 (m, 3H), 6.66-6.65 (m, 1H),
6.34 (d, J=15.3 Hz, 1H), 4.63-4.58 (m, 1H), 4.16-4.04 (m, 2H), 3.44
(s, 2H), 3.21-3.12 (m, 2H), 2.91 (br s, 2H), 2.17 (s, 3H),
2.11-2.06 (m, 2H), 1.90-1.77 (m, 2H), 1.56-1.54 (m, 2H). MS: exact
mass calculated for C.sub.28H.sub.31N.sub.5O.sub.2, 469.58; m/z
found, 470.2 [M+H].sup.+, 492.2 [M+Na].sup.+.
Example 26
##STR00036##
[0176]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(4-trifluoromethyl-phenyl)-acrylamide
[0177] The title compound (49.5 mg, 32%) was prepared as in Example
20 using trans-3-(4-trifluoromethyl-phenyl)-acrylic acid in place
of trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.62 (d, J=15.5 Hz, 1H), 7.50-7.49 (m,
2H), 7.36-7.34 (m, 2H), 7.31-7.18 (m, 6H), 6.75-6.73 (m, 1H), 6.22
(d, J=15.5 Hz, 1H), 4.74-4.69 (m, 1H), 4.17-4.10 (m, 2H), 3.47 (s,
2H), 3.29-3.24 (m, 2H), 2.91 (br s, 2H), 2.23 (s, 3H), 2.19-2.13
(m, 2H), 1.89-1.78 (m, 2H), 1.57-1.45 (m, 2H). MS: exact mass
calculated for C.sub.32H.sub.32F.sub.3N.sub.3O.sub.2, 547.24; m/z
found, 548.3 [M+H].sup.+, 570.2 [M+Na].sup.+.
Example 27
##STR00037##
[0178]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-trifluoromethyl-phenyl)-acrylamide
[0179] The title compound (80.7 mg, 52%) was prepared as in Example
20 using trans-3-(3-trifluoromethyl-phenyl)-acrylic acid in place
of trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.05 (s, 1H), 7.63 (d, J=15.5 Hz, 1H), 7.50-7.36 (m,
5H), 7.30-7.18 (m, 6H), 6.75-6.74 (m, 1H), 6.19 (d, J=15.5 Hz, 1H),
4.74-4.70 (m, 1H), 4.18-4.11 (m, 2H), 3.45 (s, 2H), 3.30-3.24 (m,
2H), 2.89 (br s, 2H), 2.24 (s, 3H), 2.15-2.11 (m, 2H), 1.89-1.77
(m, 2H), 1.56-1.43 (m, 2H). MS: exact mass calculated for
C.sub.32H.sub.32F.sub.3N.sub.3O.sub.2, 547.24; m/z found, 548.3
[M+H].sup.+, 570.2 [M+Na].sup.+.
Example 28
##STR00038##
[0180]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(2-trifluoromethyl-phenyl)-acrylamide
[0181] The title compound (144 mg, 92%) was prepared as in Example
20 using trans-3-(2-trifluoromethyl-phenyl)-acrylic acid in place
of trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.05 (s, 1H), 8.00-7.97 (m, 1H), 7.61-7.59 (m, 1H),
7.38-7.15 (m, 9H), 6.74-6.73 (m, 1H), 6.13 (d, J=15.3 Hz, 1H),
4.75-4.70 (m, 1H), 4.14-4.09 (m, 2H), 3.44 (s, 2H), 3.23 (br s,
2H), 2.89 (br s, 2H), 2.22 (s, 3H), 2.14-2.09 (m, 2H), 1.90-1.77
(m, 2H), 1.58-1.42 (m, 2H). MS: exact mass calculated for
C.sub.32H.sub.32F.sub.3N.sub.3O.sub.2, 547.24; m/z found, 548.3
[M+H].sup.+, 570.2 [M+Na].sup.+.
Example 29
##STR00039##
[0182]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-bromo-phenyl)-acrylamide
[0183] The title compound (134 mg, 84%) was prepared as in Example
20 using trans-3-(3-bromo-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid.
[0184] .sup.1H NMR (500 MHz, CDCl.sub.3): 8.04 (s, 1H), 7.54 (d,
J=15.5 Hz, 1H), 7.37-7.35 (m, 2H), 7.28-7.10 (m, 9H), 6.13 (d,
J=15.5 Hz, 1H), 4.74-4.69 (m, 1H), 4.20-4.09 (m, 2H), 3.44 (s, 2H),
3.29-3.23 (m, 2H), 2.90-2.87 (m, 2H), 2.21 (s, 3H), 2.14-2.10 (m,
2H), 1.88-1.76 (m, 2H), 1.55-1.42 (m, 2H). MS: exact mass
calculated for C.sub.31H.sub.32BrN.sub.3O.sub.2, 557.17; m/z found,
560.2 [M+H].sup.+.
Example 30
##STR00040##
[0185]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-fluoro-phenyl)-acrylamide
[0186] The title compound (94 mg, 66%) was prepared as in Example
20 using trans-3-(3-fluoro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.58 (d, J=15.5 Hz, 1H), 7.30-7.17 (m,
8H), 7.06-7.05 (m, 1H), 6.96-6.92 (m, 1H), 6.74-6.73 (m, 1H), 6.14
(d, J=15.5 Hz, 1H), 4.74 (m, 1H), 4.19-4.11 (m, 2H), 3.44 (s, 2H),
3.31-3.24 (m, 2H), 2.91-2.87 (m, 2H), 2.25 (s, 3H), 2.15-2.10 (m,
2H), 1.88-1.76 (m, 2H), 1.55-1.43 (m, 2H). MS: exact mass
calculated for C.sub.31H.sub.32FN.sub.3O.sub.2, 497.25; m/z found,
498.2 [M+H].sup.+, 520.2 [M+Na].sup.+.
Example 31
##STR00041##
[0187]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-chloro-phenyl)-acrylamide
[0188] The title compound (71 mg, 48%) was prepared as in Example
20 using trans-3-(3-chloro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid.
[0189] .sup.1H NMR (500 MHz, CDCl.sub.3): 8.04 (s, 1H), 7.56 (d,
J=15.5 Hz, 1H), 7.28-7.14 (m, 10H), 6.74-6.72 (m, 1H), 6.14 (d,
J=15.5 Hz, 1H), 4.74-4.69 (m, 1H), 4.19-4.13 (m 2H), 3.44 (s, 2H),
3.31-3.24 (m, 2H), 2.91-2.87 (m, 2H), 2.24 (s, 3H), 2.15-2.10 (m,
2H), 1.89-1.76 (m, 2H), 1.56-1.42 (m, 2H). MS: exact mass
calculated for C.sub.31H.sub.32ClN.sub.3O.sub.2, 513.22; m/z found,
514.2 [M+H].sup.+, 536.2 [M+Na].sup.+.
Example 32
##STR00042##
[0190]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-m-tolyl-acrylamide
[0191] The title compound (112 mg, 78%) was prepared as in Example
20 using trans-3-m-tolyl-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.05 (s, 1H), 7.60 (d, J=15.5 Hz, 1H), 7.28-7.18 (m,
5H), 7.16 (d, J=7.8 Hz, 1H), 7.12 (d, J=7.1 Hz, 1H), 6.74 (d, J=7.9
Hz, 1H), 6.12 (d, J=15.5 Hz, 1H), 4.76-4.71 (m, 1H), 4.16-4.11 (m,
2H), 3.44 (s, 2H), 3.28-3.23 (m, 2H), 2.90-2.85 (m, 2H), 2.28 (s,
3H), 2.23 (s, 3H), 2.12 (t, J=11.4 Hz, 2H), 1.89-1.87 (m, 1H),
1.78-1.76 (m, 1H), 1.55-1.53 (m, 1H), 1.44-1.41 (m, 1H). MS: exact
mass calculated for C.sub.32H.sub.35N.sub.3O.sub.2, 493.27; m/z
found, 494.2 [M+H].sup.+.
Example 33
##STR00043##
[0192]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-nitro-phenyl)-acrylamide
[0193] The title compound (118 mg, 79%) was prepared as in Example
20 using trans-3-(3-nitro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.10-8.05 (m, 2H), 7.65 (d, J=15.5 Hz, 1H), 7.58-7.57
(m, 1H), 7.46-7.43 (m, 1H), 7.30-7.20 (m, 7H), 6.76-6.74 (m, 1H),
6.26 (d, J=15.5 Hz, 1H), 4.74-4.69 (m, 1H), 4.20-4.11 (m, 2H), 3.45
(s, 2H), 3.32-3.23 (m, 2H), 2.90 (br s, 2H), 2.19 (s, 3H),
2.15-2.11 (m, 2H), 1.89-1.78 (m, 2H), 1.56-1.42 (m, 2H). MS: exact
mass calculated for C.sub.31H.sub.32N.sub.4O.sub.4, 524.24; m/z
found, 525.3 [M+H].sup.+, 547.2 [M+Na].sup.+.
Example 34
##STR00044##
[0194]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-cyano-phenyl)-acrylamide
[0195] The title compound (68.4 mg, 72%) was prepared as in Example
20 using trans-3-(3-cyano-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.05 (s, 1H), 7.58 (d, J=15.5 Hz, 1H), 7.53-7.48 (m,
3H), 7.40-7.37 (m, 1H), 7.28-7.20 (m, 6H), 6.75-6.73 (m, 1H), 6.20
(d, J=15.5 Hz, 1H), 4.73-4.69 (m, 1H), 4.23-4.13 (m, 2H), 3.45 (s,
2H), 3.37-3.26 (m, 2H), 2.89 (br s, 2H), 2.25 (s, 3H), 2.15-2.10
(m, 2H), 1.88-1.77 (m, 2H), 1.55-1.44 (m, 2H). MS: exact mass
calculated for C.sub.32H.sub.32N.sub.4O.sub.2, 504.25; m/z found,
505.2 [M+H].sup.+, 527.2 [M+Na].sup.+.
Example 35
##STR00045##
[0196]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3-trifluoromethanesulfinyl-phenyl)-acrylamide
[0197] The title compound (66 mg, 55%) was prepared as in Example
18 using 3-(3-trifluoromethanesulfinyl-phenyl)-propenal in place of
3-phenyl-propenal. .sup.1H NMR (500 MHz, CDCl.sub.3): 8.05 (s, 1H),
7.65-7.62 (m, 3H), 7.53-7.48 (m, 2H), 7.28-7.18 (m, 6H), 6.74 (d,
J=7.4 Hz, 1H), 6.23 (d, J=15.0 Hz, 1H), 4.74-4.69 (m, 1H),
4.18-4.13 (m, 2H), 3.45 (s, 2H), 3.30-3.24 (m, 2H), 2.94-2.84 (m,
2H), 2.23 (s, 3H), 2.13 (t, J=10.4 Hz, 2H), 1.89-1.86 (m, 1H),
1.79-1.77 (m, 1H), 1.58-1.52 (m, 1H), 1.48-1.43 (m, 1H). MS: exact
mass calculated for C.sub.32H.sub.32F.sub.3N.sub.3O.sub.3S, 595.21;
m/z found, 596.2 [M+H].
Example 36
##STR00046##
[0198]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3,5-difluoro-phenyl)-acrylamide
[0199] The title compound (151 mg, 100%) was prepared as in Example
20 using trans-3-(3,5-difluoro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.51 (d, J=15.5 Hz, 1H), 7.33-7.23 (m,
6H), 6.77-6.68 (m, 4H), 6.14 (d, J=15.5 Hz, 1H), 4.73-4.68 (m, 1H),
4.20-4.14 (m, 2H), 3.44 (s, 2H), 3.32-3.25 (m, 2H), 2.91-2.87 (m,
2H), 2.24 (s, 3H), 2.15-2.10 (m, 2H), 1.88-1.76 (m, 2H), 1.55-1.42
(m, 2H). MS: exact mass calculated for
C.sub.31H.sub.31F.sub.2N.sub.3O.sub.2, 515.24; m/z found, 516.3
[M+H].sup.+, 538.3 [M+Na].sup.+.
Example 37
##STR00047##
[0200]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3,5-dimethyl-phenyl)-acrylamide
[0201] The title compound (67 mg, 70%) was prepared as in Example
20 using trans-3-(3,5-dimethyl-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.05 (s, 1H), 7.57 (d, J=15.5 Hz, 1H), 7.28-7.16 (m,
6H), 6.89-6.88 (m, 3H), 6.74-6.73 (m, 1H), 6.10 (d, J=15.5 Hz, 1H),
4.76-4.71 (m, 1H), 4.17-4.11 (m, 2H), 3.44 (s, 2H), 3.28-3.23 (m,
2H), 2.88 (br s, 2H), 2.24 (s, 9H), 2.15-2.10 (m, 2H), 1.90-1.75
(m, 2H), 1.56-1.40 (m, 2H).
[0202] MS: exact mass calculated for
C.sub.33H.sub.37N.sub.3O.sub.2, 507.29; m/z found, 508.3
[M+H].sup.+, 530.2 [M+Na].sup.+.
Example 38
##STR00048##
[0203]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(3,5-dichloro-phenyl)-acrylamide
[0204] The title compound (68.3 mg, 65%) was prepared as in Example
20 using trans-3-(3,5-dichloro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.48 (d, J=15.5 Hz, 1H), 7.28-7.19 (m,
7H), 7.12 (s, 2H), 6.73-6.72 (m, 1H), 6.14 (d, J=15.5 Hz, 1H),
4.72-4.67 (m, 1H), 4.21-4.14 (m, 2H), 3.44 (s, 2H), 3.32-3.25 (m,
2H), 2.91-2.87 (m, 2H), 2.24 (s, 3H), 2.14-2.10 (m, 2H), 1.88-1.75
(m, 2H), 1.55-1.42 (m, 2H). MS: exact mass calculated for
C.sub.31H.sub.31Cl.sub.2N.sub.3O.sub.2, 547.18; m/z found, 548.2
[M+H].sup.+, 550.2 [M+H].sup.+, 570.2 [M+Na].sup.+.
Example 39
##STR00049##
[0205]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzoyl-piperidin-
-4-yl)-3-phenyl-acrylamide
Step A.
1-[6-(1-Benzoyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethan-
one
[0206] To a solution of 1-benzoyl-4-piperidone (250 mg, 1.2 mmol)
and 1-acetyl-6-aminoindoline (220 mg, 1.2 mmol), in
CH.sub.2Cl.sub.2 (0.2 M) was added AcOH (73 .mu.L, 1.2 mmol),
followed by Na(OAc).sub.3BH (390 mg, 1.8 mmol). The resulting
solution was allowed to stir overnight. The reaction was quenched
by the addition of satd. aq. NaHCO.sub.3 and CH.sub.2Cl.sub.2. The
layers were separated, and the organic portion was washed with
brine, dried with Na.sub.2SO.sub.4 and concentrated. Purification
by silica gel chromatography (1 to 5% MeOH/CH.sub.2Cl.sub.2)
provided the desired intermediate (132 mg, 30%).
Step B
[0207] The product from Step A (93 mg, 0.26 mmol) was acylated as
in Example 2, Step C to provide the title compound (43 mg, 34%).
.sup.1H NMR (500 MHz, CDCl.sub.3): 8.09-7.98 (br m, 1H), 7.63 (d,
J=15.5 Hz, 1H), 7.49-7.03 (m, 11H), 6.80-6.61 (br m, 1H), 6.14 (d,
J=15.5 Hz, 1H), 5.01-4.90 (m, 1H), 4.83-4.68 (br m, 1H), 3.85-3.72
(br m, 1H), 3.22-3.08 (br m, 2H), 2.92-2.78 (br m, 1H), 2.05-1.78
(br m, 3H), 1.51-1.29 (br m, 3H). MS: exact mass calculated for
C.sub.31H.sub.31N.sub.3O.sub.3, 493.24; m/z found, 494.2
[M+H].sup.+.
Example 40
##STR00050##
[0208]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-phenethyl-piperid-
in-4-yl)-3-phenyl-acrylamide
Step A.
1-[6-(1-Phenethyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-eth-
anone
[0209] The desired compound (133 mg, 64%) was prepared as in
Example 39, Step A, employing 1-phenethylpiperidone in place of
1-benzoyl-4-piperidone and using 1,2-dichloroethane as the solvent.
.sup.1H NMR (500 MHz, CDCl.sub.3): 7.64 (d, J=1.4 Hz, 1H),
7.31-7.20 (m, 2H), 7.20-7.15 (m, 3H), 6.94 (d, J=7.9 Hz, 1H), 6.27
(dd, J=8.2, 1.8 Hz, 1H), 4.06-3.95 (m, 2H), 3.39-3.29 (m, 1H),
3.10-3.02 (m, 2H), 2.97-2.90 (m, 2H), 2.84-2.77 (m, 2H), 2.63-2.57
(m, 2H), 2.20 (s, 3H), 2.25-2.18 (m, 2H), 2.12-2.02 (m, 2H),
1.55-1.40 (m, 2H).
[0210] MS: exact mass calculated for C.sub.23H.sub.29N.sub.3O,
363.23; m/z found, 364.2 [M+H].sup.+.
Step B
[0211] The title compound (45 mg, 67%) was prepared from the
product of Step A (50 mg, 0.1 mmol) as in Example 2, Step C.
.sup.1H NMR (500 MHz, CDCl.sub.3): 8.65 (s, 1H), 7.63 (d, J=15.5
Hz, 1H), 7.30-7.22 (m, 7H), 7.20-7.12 (m, 4H), 6.76 (dd, J=8.2, 1.4
Hz, 1H), 6.18 (d, J=15.5 Hz, 1H), 4.80-4.70 (m, 1H), 4.14 (dd,
J=16.8, 8.0 Hz, 2H), 3.31-3.19 (m, 2H), 3.07-2.95 (m, 2H),
2.78-2.60 (m, 2H), 2.58-2.50 (m, 2H), 2.23 (s, 3H), 2.21-2.15 (m,
2H), 1.98-1.81 (m, 2H), 1.65-1.46 (m, 2H). MS: exact mass
calculated for C.sub.32H.sub.35N.sub.3O.sub.2, 493.27; m/z found,
494.2 [M+H].sup.+.
Example 41
##STR00051##
[0212]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-phenyl-N-[1-(3-pheny-
l-propyl)-piperidin-4-yl]-acrylamide
Step A.
4-(1-Acetyl-2,3-dihydro-1H-indol-6-ylamino)-piperidine-1-carboxyli-
c acid tert-butyl ester
[0213] The desired ester (2.37 g, 68%) was prepared as in Example
39, using 4-oxo-piperidine-1-carboxylic acid tert-butyl ester (3.9
g, 19 mmol), 1-acetyl-6-aminoindoline (1.7 g, 9.8 mmol),
Na(OAc).sub.3BH (6.2 g, 29 mmol) and AcOH (3 mL, 50 mmol) in
1,2-dichloroethane (50 mL).
Step B.
trans-4-[(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-(3-phenyl-acryloyl)--
amino]-piperidine-1-carboxylic acid tert-butyl ester
[0214] The title compound (2.26 g, 70%) was made from the product
of Step A, as described in Example 2, Step C. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.64 (d, J=15.5 Hz, 1H), 7.36-7.21 (m,
5H), 7.19 (d, J=7.7 Hz, 1H), 6.74 (dd, J=8.4, 1.3 Hz, 1H), 6.15 (d,
J=15.5 Hz, 1H), 4.90-4.80 (m, 1H), 4.21-3.98 (m, 4H), 3.33-3.21 (m,
2H), 2.90-2.75 (m, 2H), 2.24 (s, 3H), 1.96-1.72 (m, 2H), 1.49-1.31
(m, 2H), 1.40 (s, 9H).
[0215] MS: exact mass calculated for
C.sub.29H.sub.35N.sub.3O.sub.4, 489.26; m/z found, 512.3
[M+Na].sup.+.
Step C.
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-phenyl-N-piperidin--
4-yl-acrylamide
[0216] The product from Step B (100 mg, 0.2 mmol) was dissolved in
2 mL of CH.sub.2Cl.sub.2 and then TFA (2 mL) was added. After
stirring for 1 h, the reaction mixture was concentrated under
reduced pressure to provide the desired product (80 mg, 69%).
.sup.1H NMR (500 MHz, CDCl.sub.3): 9.20-9.14 (m, 1H), 8.61-8.49 (m,
1H), 8.00 (s, 1H), 7.64 (d, J=15.5 Hz, 1H), 7.32-7.27 (m, 5H), 7.23
(d, J=7.8 Hz, 1H), 7.67 (d, J=6.7 Hz, 1H), 6.17 (d, J=15.5 Hz, 1H),
4.97-4.85 (m, 1H), 4.21-4.15 (m, 2H), 3.54-3.35 (m, 2H), 3.21-3.16
(m, 2H), 3.07-2.93 (m, 2H), 2.24 (s, 3H), 2.16-1.95 (m, 2H),
1.82-162 (m, 2H). MS: exact mass calculated for
C.sub.24H.sub.27N.sub.3O.sub.2, 389.21; m/z found, 390.3
[M+H].sup.+.
Step D
[0217] To a solution of 4-phenyl-butyraldehyde (104 mg, 0.780 mmol)
and the acrylamide from Step C (232 mg, 0.60 mmol) in
CH.sub.2Cl.sub.2 (0.2 M) was added Na(OAc).sub.3BH (160 mg, 0.78
mmol). The resulting mixture was allowed to stir overnight. The
reaction was quenched by the addition of satd. aq. NaHCO.sub.3 and
CH.sub.2Cl.sub.2. The layers were separated, and the organic
portion was extracted with brine, dried with Na.sub.2SO.sub.4, and
concentrated. Purification by silica gel chromatography (1 to 5%
MeOH/CH.sub.2Cl.sub.2) provided 77 mg (25%) of the desired product.
.sup.1H NMR (500 MHz, CDCl.sub.3): 7.93 (d, J=1.8 Hz, 1H), 7.56 (d,
J=15.4 Hz, 1H), 7.25-7.10 (m, 10H), 7.07 (dd, J=8.3, 1.5 Hz, 1H),
6.68 (dd, J=7.8, 2.0 Hz, 1H), 6.10 (d, J=15.6 Hz, 1H), 4.83-4.68
(m, 1H), 4.15-4.02 (m, 2H), 3.25-3.15 (m, 2H), 2.62-2.53 (m, 4H),
2.16 (s, 3H), 2.08-1.81 (m, 10H). MS: exact mass calculated for
C.sub.33H.sub.37N.sub.3O.sub.2, 507.29; m/z found, 508.4
[M+H].sup.+.
Example 42
##STR00052##
[0218] trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-cyclohexyl
methyl-piperidin-4-yl)-3-phenyl-acrylamide
[0219] The title compound (238 mg, 50%) was prepared as in Example
41, Step D, employing cyclohexane-carboxaldehyde in place of
4-phenylbutyraldehyde. .sup.1H NMR (500 MHz, CDCl.sub.3): 7.91 (s,
1H), 7.52 (d, J=15.4 Hz, 1H), 7.21-7.12 (m, 5H), 7.09 (d, J=8.1 Hz,
1H), 6.64 (dd, J=7.8, 2.0 Hz, 1H), 6.06 (d, J=15.6 Hz, 1H),
4.80-4.50 (m, 1H), 4.04 (t, J=8.6 Hz, 2H), 3.19-2.84 (m, 4H),
2.32-2.01 (m, 3H), 1.88 (s, 3H), 1.83-1.70 (m, 2H), 1.69-1.44 (m,
8H), 1.18-0.93 (m, 4H), 0.89-0.62 (m, 2H). MS: exact mass
calculated for C.sub.31H.sub.39N.sub.3O.sub.2, 485.30; m/z found,
486.4 [M+H].sup.+.
Example 43
##STR00053##
[0220]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclohexyl-eth-
yl)-piperidin-4-yl]-3-phenyl-acrylamide
[0221] The title compound (67 mg, 54%) was prepared as in Example
41, Step D, employing cyclohexyl-acetaldehyde in place of
4-phenylbutyraldehyde. .sup.1H NMR (500 MHz, CDCl.sub.3): 7.97 (s,
1H), 7.56 (d, J=15.4 Hz, 1H), 7.25-7.15 (m, 5H), 7.10 (d, J=8.3 Hz,
1H), 6.68 (dd, J=7.8, 1.5 Hz, 1H), 6.10 (d, J=15.7 Hz, 1H),
4.78-4.58 (br m, 1H), 4.13-3.98 (m, 2H), 3.28-3.08 (m, 2H),
2.98-2.80 (m, 2H), 2.35-2.19 (m, 2H), 2.16 (s, 3H), 2.10-1.91 (m,
3H), 1.87-1.69 (m, 2H), 1.64-1.49 (m, 5H), 1.33-1.20 (m, 2H),
1.99-0.98 (m, 5H), 0.90-0.71 (m, 2H).
[0222] MS: exact mass calculated for
C.sub.32H.sub.41N.sub.3O.sub.2, 499.32; m/z found, 500.4
[M+H].sup.+.
Example 44
##STR00054##
[0223]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclopentyl-et-
hyl)-piperidin-4-yl]-3-phenyl-acrylamide
[0224] The title compound (53 mg, 37%) was prepared as in Example
41, Step D, employing cyclopentyl-acetaldehyde in place of
4-phenylbutyraldehyde. .sup.1H NMR (500 MHz, CDCl.sub.3): 7.90-7.85
(br m, 1H), 7.56 (d, J=15.6 Hz, 1H), 6.69 (br d, J=7.9 Hz, 1H),
6.10 (d, J=15.9 Hz, 1H), 4.74-4.66 (br m, 1H), 4.11-4.04 (br m,
2H), 3.23-3.14 (m, 2H), 3.10-2.91 (m, 2H), 2.16 (s, 3H), 1.91-1.70
(m, 4H), 1.71-1.61 (m, 3H), 1.62-1.29 (m, 8H), 1.14-0.97 (m, 4H).
MS: exact mass calculated for C.sub.31H.sub.39N.sub.3O.sub.2,
485.30; m/z found, 486.5 [M+H].sup.+.
Example 45
##STR00055##
[0225]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
3-yl)-3-phenyl-acrylamide
Step A.
1-[6-(1-Benzyl-piperidin-3-ylamino)-2,3-dihydro-indol-1-yl]-ethano-
ne
[0226] The desired intermediate (116 mg, 30%) was prepared as in
Example 39, Step A, employing 1-benzyl-3-piperidone (510 mg, 4.4
mmol), 1-acetyl-6-aminoindoline (200 mg, 1 mmol), Na(OAc).sub.3BH
(910 mg, 4.3 mmol), and AcOH (340 .mu.L, 5.4 mmol) in
1,2-dichloroethane (20 mL).
Step B
[0227] The above intermediate (0.10 g, 0.29 mmol) was then reacted
with cinnamoyl chloride (62 mg, 0.37 mmol) as in Example 2, Step C
to provide 145 mg (99%) of the desired product. .sup.1H NMR (500
MHz, CDCl.sub.3): 8.04 (s, 1H), 7.62 (d, J=15.5 Hz, 1H), 7.30-7.18
(m, 10H), 7.15 (d, J=7.8 Hz, 1H), 6.74 (dd, J=7.3, 1.4 Hz, 1H),
6.16 (d, J=15.5 Hz, 1H), 4.79-4.68 (m, 1H), 4.18-4.07 (m, 2H),
3.30-3.15 (m, 2H), 2.98-2.85 (m, 2H), 2.26-2.23 (m, 2H), 2.21 (s,
3H), 2.15-2.01 (m, 2H), 1.93-1.75 (m, 2H), 1.60-1.35 (m, 3H). MS:
exact mass calculated for C.sub.31H.sub.33N.sub.3O.sub.2, 479.26;
m/z found, 480.2 [M+H].sup.+.
Example 46
##STR00056##
[0228]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-pyrrolidin-
-3-yl)-3-phenyl-acrylamide
Step A.
1-[6-(1-benzyl-pyrrolidin-3-ylamino)-2,3-dihydro-indol-1-yl]-ethan-
one
[0229] The desired intermediate (84 mg, 44%) was prepared as in
Example 39, Step A, using 1-benzyl-3-pyrrolidinone (0.20 g, 1.1
mmol), 1-acetyl-6-aminoindoline (0.10 g, 0.57 mmol),
Na(OAc).sub.3BH (360 mg, 1.7 mmol), and AcOH (171 .mu.L, 3.0 mmol)
in 1,2-dichloroethane (10 mL). .sup.1H NMR (500 MHz, CDCl.sub.3):
7.61 (s, 1H), 7.35-7.28 (m, 4H), 7.28-7.20 (m, 1H), 6.93 (d, J=8.1
Hz, 1H), 6.24 (dd, J=8.2, 1.9 Hz, 1H), 4.05-3.96 (m, 3H), 3.68-3.56
(m, 2H), 3.10-3.01 (m, 2H), 2.80-2.71 (m, 2H), 2.59-2.51 (m, 1H),
2.48-2.39 (m, 1H), 2.38-2.22 (m, 1H), 2.20 (s, 3H), 1.71-1.56 (m,
1H). MS: exact mass calculated for C.sub.21H.sub.25N.sub.3O,
335.20; m/z found, 336.1 [M+H].sup.+.
Step B
[0230] The above intermediate (49 mg, 0.29 mmol) was reacted with
cinnamoyl chloride (276 mg, 0.2 mmol) as in Example 2, Step C to
provide 79 mg (74%) of the desired product. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.09 (s, 1H), 7.62 (d, J=15.5 Hz, 1H), 7.30-7.15 (m,
1H), 6.78 (d, J=7.0 Hz, 1H), 6.17 (d, J=15.5 Hz, 1H), 5.15-5.05 (br
m, 1H), 4.19-4.08 (m, 2H), 3.70-3.51 (m, 2H), 3.29-3.20 (m, 2H),
3.07-2.95 (br m, 1H), 2.76-2.57 (br m, 3H), 2.30-2.22 (m, 1H), 2.21
(s, 3H), 1.98-1.83 (m, 1H). MS: exact mass calculated for
C.sub.30H.sub.31N.sub.3O.sub.2, 465.24; m/z found, 466.2
[M+H].sup.+.
Example 47
##STR00057##
[0231]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(3-benzylamino-propy-
l)-3-phenyl-acrylamide
Step A.
[3-(1-Acetyl-2,3-dihydro-1H-indol-6-ylamino)-propyl]-carbamic acid
tert-butyl ester
[0232] A mixture of 1-(6-amino-2,3-dihydro-indol-1-yl)-ethanone
(837 mg, 4.8 mmol), (3-bromo-propyl)-carbamic acid tert-butyl ester
(1.1 g, 4.8 mmol) and K.sub.2CO.sub.3 (1.3 g, 9.5 mmol) in
acetonitrile (15 mL) was heated at reflux for 48 h. A white
precipitate was filtered off and the filtrate was concentrated
under reduced pressure. The residue was purified on silica gel (50%
EtOAc/hexanes) to give the desired product as a white solid (320
mg, 20%).
Step B.
trans-{3-[(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-(3-phenyl-acryloyl)-
-amino]-propyl}-carbamic acid tert-butyl ester
[0233] The ester from Step A (270 mg, 0.80 mmol) was acylated with
cinnamoyl chloride (203 mg, 1.2 mmol) as in Example 2, Step C to
provide the desired ester (345 mg, 92%).
Step C.
trans-N-(1-acetyl-2,3-dihydro-1H-indol-6-yl)-N-(3-amino-propyl)-3--
phenyl-acrylamide
[0234] The ester from Step B (345 mg, 0.7 mmol) was dissolved in
CH.sub.2Cl.sub.2 (5.0 mL) and was treated with TFA (2.5 mL). After
3 h, the reaction mixture was concentrated. The resulting salt was
diluted with EtOAc and treated with 1 N NaOH until pH 10 was
achieved. The organic layer was then separated and concentrated
under reduced pressure to give the desired amine (268 mg, 100%),
which was used without further purification.
Step D.
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(3-benzylamino-prop-
yl)-3-phenyl-acrylamide
[0235] The primary amine from Step C (268 mg, 0.74 mmol) and
benzaldehyde (0.08 mL, 0.74 mmol) were dissolved in MeOH and the
resulting reaction mixture was stirred at rt for 20 h. Sodium
borohydride (45 mg, 1.2 mmol) was added. After 10 min, the reaction
mixture was quenched with 1 N NaOH and then extracted with EtOAc.
The organic layer was concentrated under reduced pressure. The
crude product was purified on silica gel (EtOAc) to give the title
compound (235 mg, 70%). .sup.1H NMR (500 MHz, CDCl.sub.3): 8.14 (s,
1H), 7.65 (d, J=15.5 Hz, 1H), 7.31-7.29 (m, 5H), 7.27-7.26 (m, 5H),
7.17 (d, J=7.9 Hz, 1H), 6.78 (d, J=7.1 Hz, 1H), 6.32 (d, J=15.5 Hz,
1H), 4.15 (t, J=8.4 Hz, 2H), 3.91 (br s, 2H), 3.76 (s, 2H), 3.25
(t, J=8.5 Hz, 2H), 2.66 (t, J=6.9 Hz, 2H), 2.24 (s, 3H), 1.80-1.74
(m, 2H). MS: exact mass calculated for
C.sub.29H.sub.31N.sub.3O.sub.2, 453.24; m/z found, 454.2
[M+H].sup.+.
Example 48
##STR00058##
[0236]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[3-(allyl-benzyl-ami-
no)-propyl]-3-phenyl-acrylamide
[0237] A mixture of
trans-N-(1-acetyl-2,3-dihydro-1H-indol-6-yl)-N-(3-benzylamino-propyl)-3-p-
henyl-acrylamide (Example 47, 39 mg, 0.090 mmol), allyl iodide
(0.01 mL, 0.1 mmol), and diisopropylethylamine (0.03 mL, 0.2 mmol)
in CH.sub.2Cl.sub.2 (3.0 mL) was stirred at rt for 20 h. The
reaction mixture was concentrated under reduced pressure and the
crude product was purified on silica gel (60% EtOAc/hexanes) to
provide the title compound (37 mg, 87%). .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.13 (s, 1H), 7.65 (d, J=15.5 Hz, 1H), 7.31-7.24 (m,
10H), 7.15 (d, J=7.6 Hz, 1H), 6.71 (d, J=7.3 Hz, 1H), 6.30 (d,
J=16.5 Hz, 1H), 5.84-5.80 (m, 1H), 5.10 (dd, J=17.0, 10.1 Hz, 2H),
4.11 (t, J=7.3 Hz, 2H), 3.84 (br s, 2H), 3.50 (s, 2H), 3.24 (t,
J=8.5 Hz, 2H), 3.02 (d, J=6.3 Hz, 2H), 2.46 (t, J=7.1 Hz, 2H), 2.23
(s, 3H), 1.81-1.75 (m, 2H). MS: exact mass calculated for
C.sub.32H.sub.35N.sub.3O.sub.2, 493.64; m/z found, 494.2
[M+H].sup.+.
Example 49
##STR00059##
[0238]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(4-chloro-phenyl)-N--
[1-(2-cyclohexyl-ethyl)-piperidin-4-yl]-acrylamide
Step A.
trans-4-{(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-[3-(4-chloro-phenyl)-
-acryloyl]-amino}-piperidine-1-carboxylic acid tert-butyl ester
[0239] The ester (1.26 g, 87%) was prepared as in Example 20 using
trans-3-(4-chloro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid and
4-(1-acetyl-2,3-dihydro-1H-indol-6-ylamino)-piperidine-1-carboxylic
acid tert-butyl ester (Example 41, Step A) in place of
1-[6-(1-benzyl-piperidin-4-ylamino)-2,3-dihydro-indol-1-yl]-ethanone.
.sup.1H NMR (500 MHz, CDCl.sub.3): 8.02 (s, 1H), 7.56 (d, J=15.5
Hz, 1H), 7.21-7.17 (m, 5H), 6.73-6.71 (m, 1H), 6.10 (d, J=15.5 Hz,
1H), 4.84-4.79 (m, 1H), 4.17-4.12 (m, 4H), 3.29-3.24 (m, 2H), 2.80
(br s, 2H), 2.23 (s, 3H), 1.90-1.77 (m, 2H), 1.51-1.27 (m, 11H).
MS: exact mass calculated for C.sub.29H.sub.34ClN.sub.3O.sub.4,
523.22; m/z found, 546.2 [M+Na].sup.+, 548.2 [M+Na].sup.+.
Step B.
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(4-chloro-phenyl)-N-
-piperidin-4-yl-acrylamide
[0240] The intermediate from Step A (1.22 g, 2.32 mmol) was
dissolved in CH.sub.2Cl.sub.2 (10 mL) and was treated with TFA (10
mL). The mixture was stirred for 30 min at rt and then was
concentrated in vacuo. The residue was dissolved in
CH.sub.2Cl.sub.2 and treated with Dowex 550A resin. After stirring
for several hours, the mixture was filtered and concentrated in
vacuo to give 966 mg (98%) of the desired compound, which was taken
on to the next step without further purification.
Step C
[0241] The title compound (54 mg, 61%) was prepared from the
intermediate from Step B (70.0 mg, 0.165 mmol) as in Example 43,
using 1,2-dichloroethane as the solvent. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.57 (d, J=15.5 Hz, 1H), 7.30-7.16 (m,
5H), 6.75 (br s, 1H), 6.14 (d, J=15.5 Hz, 1H), 4.75 (br s, 1H),
4.17-4.14 (m, 2H) 3.53-3.27 (m, 4H), 2.92 (br s, 2H), 2.28-2.23 (m,
4H), 2.07-2.04 (m, 2H), 1.66-1.43 (m, 9H), 1.29-1.11 (m, 5H),
0.89-0.86 (m, 2H).
[0242] MS: exact mass calculated for
C.sub.32H.sub.40ClN.sub.3O.sub.2, 533.28; m/z found, 534.2
[M+H].sup.+, 556.3 [M+Na].sup.+.
Example 50
##STR00060##
[0243]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclohexyl-eth-
yl)-piperidin-4-yl]-3-(3-nitro-phenyl)-acrylamide
[0244] The title compound (54 mg, 62%) was prepared as in Example
49, using trans-3-(3-nitro-phenyl)-acrylic acid in place of
trans-3-(4-chloro-phenyl)-acrylic acid.
[0245] .sup.1H NMR (500 MHz, CDCl.sub.3): 8.10-8.05 (m, 3H), 7.66
(d, J=15.5 Hz, 1H), 7.59-7.57 (m, 1H), 7.46-7.43 (m, 1H), 7.21-7.19
(m, 1H), 6.77-6.75 (m, 1H), 6.28 (d, J=15.5 Hz, 1H), 4.75-4.70 (m,
1H), 4.19-4.13 (m, 2H), 3.31-3.20 (m, 3H), 2.98 (br s, 2H), 2.33
(br s, 2H), 2.23 (s, 3H), 2.10 (br s, 2H), 1.89-1.86 (m, 2H),
1.70-1.55 (m, 6H), 1.32-1.10 (m, 6H), 0.91-0.84 (m, 2H). MS: exact
mass calculated for C.sub.32H.sub.40N.sub.4O.sub.4, 544.30; m/z
found, 545.3 [M+H].sup.+, 567.3 [M+Na].sup.+.
Example 51
##STR00061##
[0246]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(4-chloro-phenyl)-N--
[1-(2-cyclopentyl-ethyl)-piperidin-4-yl]-acrylamide
[0247] The title compound (72 mg, 60%) was prepared as in Example
49, using cyclopentyl-acetaldehyde in place of
cyclohexyl-acetaldehyde. .sup.1H NMR (500 MHz, CDCl.sub.3): 8.04
(s, 1H), 7.57 (d, J=15.5 Hz, 1H), 7.23-7.16 (m, 5H), 6.75-6.73 (m,
1H), 6.14 (d, J=15.5 Hz, 1H), 4.75-4.70 (m, 1H), 4.17-4.10 (m, 2H),
3.32-3.22 (m, 2H), 2.98-2.96 (m, 2H), 2.39-2.18 (m, 7H), 2.16-2.09
(m, 2H), 1.92-1.40 (m, 11H), 1.07-1.05 (m, 2H). MS: exact mass
calculated for C.sub.31H.sub.38ClN.sub.3O.sub.2, 519.27; m/z found,
520.2 [M+H].sup.+, 522.2 [M+H].sup.+, 543.2 [M+Na].sup.+.
Example 52
##STR00062##
[0248]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(2-cyclopentyl-et-
hyl)-piperidin-4-yl]-3-(3-nitro-phenyl)-acrylamide
[0249] The title compound (67.1 mg, 55%) was prepared as in Example
50, using cyclopentyl-acetaldehyde in place of
cyclohexyl-acetaldehyde. .sup.1H NMR (500 MHz, CDCl.sub.3):
8.10-8.07 (m, 3H), 7.66 (d, J=15.5 Hz, 1H), 7.59-7.57 (m, 1H),
7.46-7.43 (m, 1H), 7.20-7.19 (m, 1H), 6.77-6.75 (m, 1H), 6.28 (d,
J=15.5 Hz, 1H), 4.74-4.71 (m, 1H), 4.19-4.10 (m, 2H), 3.31-3.23 (m,
2H), 2.96-2.94 (m, 2H), 2.31-2.18 (m, 5H), 2.07-2.04 (m, 2H),
1.78-1.44 (m, 13H), 1.07-1.04 (m, 2H). MS: exact mass calculated
for C.sub.31H.sub.38N.sub.4O.sub.4, 530.29; m/z found, 531.3
[M+H].sup.+, 553.3 [M+Na].sup.+.
Example 53
##STR00063##
[0250]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-3-(3-cyano-phenyl)-N-[-
1-(2-cyclopentyl-ethyl)-piperidin-4-yl]-acrylamide
[0251] The title compound (61 mg, 50%) was prepared as in Example
52, using trans-3-(3-cyano-phenyl)-acrylic acid in place of
trans-3-(4-chloro-phenyl)-acrylic acid. .sup.1H NMR (500 MHz,
CDCl.sub.3): 8.04 (s, 1H), 7.59 (d, J=15.5 Hz, 1H), 7.53-7.49 (m,
3H), 7.40-7.37 (m, 1H), 7.20-7.19 (m, 1H), 6.78-6.73 (m, 1H), 6.22
(d, J=15.5 Hz, 1H), 4.72 (br s, 1H), 4.22-4.11 (m, 2H), 3.34-3.24
(m, 2H), 2.96 (br s, 1H), 2.30-2.24 (m, 5H), 2.08-1.86 (m, 6H),
1.71-1.44 (m, 10H), 1.07-1.03 (m, 2H). MS: exact mass calculated
for C.sub.32H.sub.38N.sub.4O.sub.2, 510.30; m/z found, 511.2
[M+H].sup.+, 533.3 [M+Na].sup.+.
Example 54
##STR00064##
[0252]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-(1-benzyl-piperidin--
4-yl)-3-(4-chloro-phenyl)-acrylamide
[0253] The title compound (135 mg, 92%) was prepared as in Example
20 using trans-3-(4-chloro-phenyl)-acrylic acid in place of
trans-3-thiophen-3-yl-acrylic acid.
[0254] .sup.1H NMR (500 MHz, CDCl.sub.3): 8.04 (s, 1H), 7.56 (d,
J=15.5 Hz, 1H), 7.31-7.15 (m, 10H), 6.73 (dd, J=8.1, 1.5 Hz, 1H),
6.12 (d, J=15.5 Hz, 1H), 4.75-4.68 (m, 1H), 4.18-4.12 (m, 2H), 3.44
(s, 2H), 3.31-3.22 (m, 2H), 2.91-2.86 (m, 2H), 2.23 (s, 3H),
2.18-2.05 (m, 2H), 1.90-1.70 (m, 2H), 1.60-1.51 (m, 1H), 1.50-1.37
(m, 1H). MS: exact mass calculated for
C.sub.31H.sub.32ClN.sub.3O.sub.2, 513.22; m/z found, 514.2
[M+H].sup.+.
Example 55
##STR00065##
[0255]
trans-{4-[(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-(3-phenyl-acryloyl)--
amino]-piperidin-1-yl}-phenyl-acetic acid methyl ester
[0256] To a solution of
trans-N-(1-acetyl-2,3-dihydro-1H-indol-6-yl)-3-phenyl-N-piperidin-4-yl-ac-
rylamide (Example 41, Step C; 49 mg, 0.13 mmol) in DMF (0.5 mL) and
DCM (2 mL) was added Na.sub.2CO.sub.3 (41 mg, 0.39 mmol) followed
by methyl .alpha.-bromophenylacetate (26 .mu.L, 0.16 mmol). After
stirring overnight, the reaction mixture was poured into H.sub.2O
and DCM was added. The organic fraction was washed with brine
(3.times.), dried (Na.sub.2SO.sub.4), and concentrated.
Purification by silica gel chromatography (2% methanol (2 M
NH.sub.3) in DCM) afforded 59 mg (84%) of the title compound.
.sup.1H NMR (400 MHz, CDCl.sub.3): 8.04 (br d, J=12.4 Hz, 1H), 7.62
(d, J=15.4 Hz, 1H), 7.38-7.22 (m, 10H), 7.18 (dd, J=8.8, 8.0 Hz,
1H), 6.73 (dd, J=17.2, 7.8 Hz, 1H), 6.15 (d, J=15.6 Hz, 1H), 4.74
(br dd, J=12.4, 12.1 Hz, 1H), 4.17 (dd, J=8.8, 8.3 Hz, 2H), 3.94
(d, J=3.8 Hz, 1H), 3.65 (s, 3H), 3.31-3.24 (m, 2H), 3.01-2.94 (m,
1H), 2.76-2.69 (m, 1H), 2.34-2.22 (m, 1H), 2.24 (d, J=5.3 Hz, 3H),
2.02-1.76 (m, 2H), 1.76-1.63 (m, 1H), 1.61 (s, 3H), 1.58-1.40 (m,
1H). MS: exact mass calculated for C.sub.33H.sub.35N.sub.3O.sub.4,
537.3; m/z found, 538.5 [M+H].sup.+.
Example 56
##STR00066##
[0257]
trans-N-(1-Acetyl-2,3-dihydro-1H-indol-6-yl)-N-[1-(ethylcarbamoyl-p-
henyl-methyl)-piperidin-4-yl]-3-phenyl-acrylamide
[0258] The title compound (x mg, x %) was prepared from
trans-N-(1-acetyl-2,3-dihydro-1H-indol-6-yl)-3-phenyl-N-piperidin-4-yl-ac-
rylamide and 2-bromo-N-ethyl-2-phenyl-acetamide as described in
Example 55. After silica gel chromatography, the compound was
further purified by reverse-phase HPLC to yield the desired product
as its TFA salt. .sup.1H NMR (400 MHz, CDCl.sub.3): 8.58-8.48 (m,
1H), 8.06-7.91 (m, 1H), 7.57 (d, J=15.6 Hz, 1H), 7.55-7.46 (m, 5H),
7.46-7.34 (m, 1H), 7.34-7.23 (m, 3H), 7.00-6.85 (m, 1H), 6.22 (d,
J=15.4 Hz, 1H), 4.47-4.67 (m, 1H), 4.30-4.18 (m, 2H), 3.85-3.68 (m,
1H), 3.37-3.14 (m, 9H), 3.13-3.01 (m, 1H), 2.99-2.84 (m, 1H), 2.25
(br s, 3H), 2.10-1.71 (m, 2H), 1.03 (t, J=7.3 Hz, 3H). MS: exact
mass calculated for C.sub.34H.sub.38N.sub.4O.sub.3, 550.3; m/z
found, 551.5 [M+H].sup.+.
Assay Methods
Radioligand Binding Assay
[0259] KAN-Ts endogenously expressing Y2 receptors were used for
the radioligand binding assay. Cells were grown to confluence on
150 cm.sup.2 tissue culture plates, washed with phosphate-buffered
saline (PBS), and scraped into 50 mL tubes. After centrifugation,
the supernatant was aspirated, and the pellets frozen and stored at
-80.degree. C. Thawed pellets were homogenized with a polytron
tissue grinder for 15 sec in 20 mM Tris-HCl, 5 mM EDTA. The
homogenate was centrifuged at 800.times.g for 5 min and the
collected supernatant was recentrifuged at 25000.times.g for 25
min. The resulting pellet was resuspended in binding buffer (20 mM
HEPES, 120 mM NaCl, 0.22 mM KH.sub.2PO.sub.4, 1.3 mM CaCl.sub.2,
0.8 mM MgSO.sub.4). Membranes were incubated with [.sup.125I]PYY
(80 pM) in the presence or absence of test compound for 1 h at rt.
The reaction was stopped by filtration through GF/C filter plates
pre-soaked in 0.3% polyethylenimine and subsequently washed with
Tris 50 mM, 5 mM EDTA buffer. Plates were dried for 1 h in a
55.degree. C. oven, scintillation fluid was added and the
radioactivity was counted in a Packard TopCount. Specific binding
to the NPY receptor subtypes was determined by radioactivity that
was bound in the presence of 1 mM NPY. Each binding experiment was
repeated three to eight times, each in duplicate. IC.sub.50 values
(i.e. concentration of unlabelled peptide or antagonist required to
compete for 50% of specific binding to the radioligand) were
calculated using the GraphPad Prism software (GraphPad Software
Inc., San Diego Calif.) with a fit to a sigmoidal dose response
curve. Data were expressed as pIC.sub.50 values where
pIC.sub.50=-log IC.sub.50. Data is presented in Table 1.
TABLE-US-00002 TABLE 1 EX IC.sub.50 (.mu.M) 1 4.0 2 22 3 3.5 4 4.8
5 4.8 6 5.3 7 15 8 30 9 10 10 30 11 30 12 18 13 11 14 30 15 30 16
9.2 17 22 18 2.8 19 30 20 3.2 21 30 22 30 23 12 24 30 25 17 26 2.8
27 8.9 28 30 29 3.3 30 3.6 31 3.0 32 1.4 33 1.9 34 1.0 35 5.8 36
2.5 37 3.9 38 30 39 29 40 26 41 2.3 42 1.1 43 0.6 44 0.8 45 16 46
18 47 12 48 12 49 1.1 50 0.5 51 1.1 52 0.35 53 0.1 54 3.6 55 6.3 56
30
[.sup.35S] GTP.gamma.S binding assay in KAN-Ts cells
[0260] Membranes from KAN-Ts cells were prepared as described
above. Membranes were thawed on ice and diluted in 50 mM Tris-HCl
buffer, pH 7.4 containing 10 mM MgCl.sub.2, 1 mM EDTA, 100 mM NaCl,
5 mM GDP, 0.25% BSA. Assay mixtures (150 mL) were preincubated with
compounds for 30 min at rt. Then, 50 mL of [.sup.35S]GTP.gamma.S in
assay buffer was added to a final concentration of 200 .mu.M and
the assay mixtures were incubated for 1 h at rt. Reactions were
terminated by rapid filtration thought GF/C filters. Filters were
washes twice with ice cold 50 mM Tris-HCl, pH 7.4 containing 10 mM
MgCl.sub.2. Basal [.sup.35S]GTP.gamma.S was measured in the absence
of compounds. In initial experiments, nonspecific binding was
measured in the presence of 100 mM GTP.gamma.S. This nonspecific
binding never exceeded 10% of basal binding and was thus not
subtracted from experimental data. Stimulation of
[.sup.35S]GTP.gamma.S is presented as percentage over basal and was
calculated as one hundred times the difference between stimulated
and basal binding (in cpm). Agonist concentration-response curves
for increases in [.sup.35S]GTP.gamma.S binding and antagonist
inhibition curves for inhibition of PYY (300 nM)-stimulated
[.sup.35S]GTP.gamma.S binding were analyzed by non-linear
regression using GraphPad Prism software (GraphPad Software Inc.,
San Diego Calif.). EC.sub.50 (concentration of compound at which
50% of its own maximal stimulation is obtained) and IC.sub.50
(concentration of its own maximal inhibition of PYY-stimulated
[.sup.35S]GTP.gamma.S binding is obtained) were derived from the
curves. IC.sub.50 values were corrected as follows: corrected
IC.sub.50 (IC.sub.50corr)=IC.sub.50/(1+[PYY]/EC.sub.50 (PYY)) and
pIC.sub.50corr=-log IC.sub.50corr. The title compound of Example 53
was demonstrated to be a competitive in this assay
(pIC.sub.50=7.20).
* * * * *