U.S. patent application number 15/649682 was filed with the patent office on 2019-01-17 for novel organoleptic compounds.
The applicant listed for this patent is INTERNATIONAL FLAVORS & FRAGRANCES INC.. Invention is credited to Anubhav P.S. NARULA, Richard A. WEISS.
Application Number | 20190016990 15/649682 |
Document ID | / |
Family ID | 63077691 |
Filed Date | 2019-01-17 |
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United States Patent
Application |
20190016990 |
Kind Code |
A1 |
WEISS; Richard A. ; et
al. |
January 17, 2019 |
NOVEL ORGANOLEPTIC COMPOUNDS
Abstract
The present invention relates to novel compounds and their use
as fragrance materials.
Inventors: |
WEISS; Richard A.;
(Livingston, NJ) ; NARULA; Anubhav P.S.; (Hazlet,
NJ) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
INTERNATIONAL FLAVORS & FRAGRANCES INC. |
NEW YORK |
NY |
US |
|
|
Family ID: |
63077691 |
Appl. No.: |
15/649682 |
Filed: |
July 14, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
C11B 9/0015 20130101;
A61K 8/33 20130101; C07C 43/15 20130101; A61Q 13/00 20130101 |
International
Class: |
C11B 9/00 20060101
C11B009/00 |
Claims
1. A compound selected from the group consisting of:
2-methoxy-6-methyl-octa-1,5-diene;
2-methoxy-6-methyl-octa-2,5-diene; and a mixture thereof.
2. A fragrance formulation containing an olfactory acceptable
amount of a compound selected from the group consisting of:
2-methoxy-6-methyl-octa-1,5-diene;
2-methoxy-6-methyl-octa-2,5-diene; and a mixture thereof.
3. The fragrance formulation of claim 2, wherein the olfactory
acceptable amount is from about 0.005 to about 50 weight percent of
the fragrance formulation.
4. The fragrance formulation of claim 2, wherein the olfactory
acceptable amount is from about 0.5 to about 25 weight percent of
the fragrance formulation.
5. The fragrance formulation of claim 2, wherein the olfactory
acceptable amount is from about 1 to about 10 weight percent of the
fragrance formulation.
6. The fragrance formulation of claim 2 further comprising a
material selected from the group consisting of a polymer, an
oligomer and an adjuvant.
7. The fragrance formulation of claim 6, wherein the polymer is
selected from the group consisting of polyacrylate, polyurea,
polyurethane, polyacrylamide, polyester, polyether, polyamide,
poly(acrylate-co-acrylamide), starch, silica, gelatin and gum
Arabic, alginate, chitosan, polylactide,
poly(melamine-formaldehyde), poly(urea-formaldehyde), and a
combination thereof.
8. A method of improving, enhancing or modifying a fragrance
formulation through the addition of an olfactory acceptable amount
of a compound selected from the group consisting of:
2-methoxy-6-methyl-octa-1,5-diene;
2-methoxy-6-methyl-octa-2,5-diene; and a mixture thereof.
9. The method of claim 8, wherein the olfactory acceptable amount
is from about 0.005 to about 50 weight percent of the fragrance
formulation.
10. The method of claim 8, wherein the olfactory acceptable amount
is from about 0.5 to about 25 weight percent of the fragrance
formulation.
11. The method of claim 8, wherein the olfactory acceptable amount
is from about 1 to about 10 weight percent of the fragrance
formulation.
12. A fragrance product containing an olfactory acceptable amount
of the compound of claim 1.
13. The fragrance product of claim 12, wherein the fragrance
product is selected from the group consisting of a perfume, a
cologne, toilet water, a cosmetic product, a personal care product,
a fabric care product, a cleaning product, an air freshener, a bar
soap, a liquid soap, a shower gel, a foam bath, a skin care
product, a hair care product, a deodorant, an antiperspirant, a
feminine care product, a baby care product, a family care product,
an air care product, a fragrance delivery system, a disinfectant, a
washing agent, a dental and oral hygiene product, a health care and
nutritional product and a food product.
14. The fragrance product of claim 13, wherein the cleaning product
is selected from the group consisting of a detergent, a dishwashing
material, a scrubbing composition, a glass cleaner, a metal
cleaner, a countertop cleaner, a floor cleaner, a carpet cleaner, a
toilet cleaner and a bleach additive.
15. The fragrance product of claim 13, wherein the washing agent is
selected from the group consisting of a laundry detergent and a
rinse additive.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to new chemical entities and
the incorporation and use of the new chemical entities as fragrance
materials.
BACKGROUND OF THE INVENTION
[0002] There is an ongoing need in the fragrance industry to
provide new chemicals to give perfumers and other persons the
ability to create new fragrances for perfumes, colognes and
personal care products. Those with skill in the art appreciate how
differences in the chemical structure of the molecule can result in
significant differences in the odor, notes and characteristics of a
molecule. These variations and the ongoing need to discover and use
the new chemicals in the development of new fragrances allow the
perfumers to apply the new compounds in creating new
fragrances.
SUMMARY OF THE INVENTION
[0003] The present invention provides novel compounds and their
unexpected advantageous use in enhancing, improving or modifying
the fragrance of perfumes, colognes, toilet water, fabric care
products, personal products and the like.
[0004] More specifically, an embodiment of the present invention
relates to novel compounds represented by Formula I,
2-methoxy-6-methyl-octa-1,5-diene; Formula II,
2-methoxy-6-methyl-octa-2,5-diene; and a mixture thereof which
exhibit unexpected herbal, ocean breezy and ozoney notes, and a
method of improving, enhancing or modifying a fragrance formulation
through the addition of an olfactory acceptable amount of theses
compounds.
##STR00001##
[0005] Another embodiment of the present invention relates to a
fragrance composition comprising the novel compounds provided
above.
[0006] Another embodiment of the present invention relates to a
fragrance product comprising the compounds provided above.
[0007] Another embodiment of the present invention relates to a
method of improving, enhancing or modifying a fragrance formulation
through the addition of an olfactory acceptable amount of the novel
compounds provided above.
[0008] These and other embodiments of the present invention will be
apparent by reading the following specification.
DETAILED DESCRIPTION OF THE INVENTION
[0009] It has been surprisingly and unexpectedly found that small
differences in the chemical structures of the present invention can
result in significant differences in odors, notes and
characteristics. Specifically, only
2-methoxy-6-methyl-octa-1,5-diene,
2-methoxy-6-methyl-octa-2,5-diene, or their mixture have been found
to possess desirable and useful fragrance properties of high
strength while other close analogs exhibit much weaker strength,
which renders these analogs unsuitable for fragrance use. Thus, the
present invention relates to the surprising and unexpected
discovery of the particularly desirable and strong odor properties
of 2-methoxy-6-methyl-octa-1,5-diene,
2-methoxy-6-methyl-octa-2,5-diene, or a mixture thereof.
[0010] Those with skill in the art will recognize that, if needed,
the isomeric products obtained as described above can be further
separated using techniques known to those with skill in the art.
Suitable techniques include, for example, distillation and
chromatography such as high performance liquid chromatography,
referred to as HPLC, particularly silica gel chromatograph, and gas
chromatography trapping known as GC trapping. Yet, commercial
products are mostly offered as isomeric mixtures.
[0011] The preparation of the compounds of the present invention is
detailed in the Examples. Materials were purchased from Aldrich
Chemical Company unless noted otherwise.
[0012] The use of the compounds of the present invention is widely
applicable in current perfumery products, including the preparation
of perfumes and colognes, the perfuming of personal care products
such as soaps, shower gels, and hair care products, fabric care
products, air fresheners, and cosmetic preparations. The present
invention can also be used to perfume cleaning agents, such as, but
not limited to detergents, dishwashing materials, scrubbing
compositions, window cleaners and the like.
[0013] In these preparations, the compounds of the present
invention can be used alone or in combination with other perfuming
compositions, solvents, adjuvants and the like. The nature and
variety of the other ingredients that can also be employed are
known to those with skill in the art. Many types of fragrances can
be employed in the present invention, the only limitation being the
compatibility with the other components being employed. Suitable
fragrances include but are not limited to fruits such as almond,
apple, cherry, grape, pear, pineapple, orange, strawberry,
raspberry; musk, flower scents such as lavender-like, rose-like,
iris-like, carnation-like. Other pleasant scents include herbal and
woodland scents derived from pine, spruce and other forest smells.
Fragrances may also be derived from various oils, such as essential
oils, or from plant materials such as peppermint, spearmint and the
like.
[0014] A list of suitable fragrances is provided in U.S. Pat. No.
4,534,891, the contents of which are incorporated by reference as
if set forth in its entirety. Another source of suitable fragrances
is found in Perfumes, Cosmetics and Soaps, Second Edition, edited
by W. A. Poucher, 1959. Among the fragrances provided in this
treatise are acacia, cassie, chypre, cyclamen, fern, gardenia,
hawthorn, heliotrope, honeysuckle, hyacinth, jasmine, lilac, lily,
magnolia, mimosa, narcissus, freshly-cut hay, orange blossom,
orchid, reseda, sweet pea, trefle, tuberose, vanilla, violet,
wallflower, and the like.
[0015] The compounds of the present invention can be used in
combination with a complementary fragrance compound. The term
"complementary fragrance compound" as used herein is defined as a
fragrance compound selected from the group consisting of
2-[(4-methylphenyl)methylene]-heptanal (Acalea), iso-amyl oxyacetic
acid allylester (Allyl Amyl Glycolate),
(3,3-dimethylcyclohexyl)ethyl ethyl propane-1,3-dioate (Applelide),
(E/Z)-1-ethoxy-1-decene (Arctical),
2-ethyl-4-(2,2,3-trimethyl-3-cyclo-penten-1-yl)-2-buten-1-ol
(Bacdanol),
2-methyl-3-[(1,7,7-trimethylbicyclo[2.2.1]hept-2-yl)oxy]
exo-1-propanol (Bornafix),
1,2,3,5,6,7-hexahydro-1,1,2,3,3-pentamethyl-4H-inden-4-one
(Cashmeran), trimethylcyclopentenylmethyloxabicyclooctane
(Cassiffix), 1,1-dimethoxy-3,7-dimethyl-2,6-octadiene (Citral DMA),
3,7-dimethyl-6-octen-1-ol (Citronellol),
3A,4,5,6,7,7A-hexahydro-4,7-methano-1H-inden-5/6-yl acetate
(Cyclacet), 3A,4,5,6,7,7A-hexahydro-4,7-methano-1H-inden-5/6-yl
propinoate (Cyclaprop),
3A,4,5,6,7,7A-hexahydro-4,7-methano-1G-inden-5/6-yl butyrate
(Cyclobutanate),
1-(2,6,6-trimethyl-3-cyclohexen-1-yl)-2-buten-1-one (Delta
Damascone), 3-(4-ethylphenyl)-2,2-dimethyl propanenitrile
(Fleuranil), 3-(O/P-ethylphenyl) 2,2-dimethyl propionaldehyde
(Floralozone), tetrahydro-4-methyl-2-(2-methylpropyl)-2H-pyran-4-ol
(Floriffol),
1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta-gamma-2-benzopyran
(Galaxolide), 1-(5,5-dimethyl-1-cyclohexen-1-yl)pent-4-en-1-one
(Galbascone), E/Z-3,7-dimethyl-2,6-octadien-1-yl acetate (Geranyl
Acetate), .alpha.-methyl-1,3-benzodioxole-5-propanal (Helional),
1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-1,6-heptadien-3-one
(Hexalon), (Z)-3-hexenyl-2-hydroxybenzoate (Hexenyl Salicylate,
CIS-3), 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one (Ionone
.alpha.),
1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)-ethan-1--
one (Iso E Super), methyl 3-oxo-2-pentylcyclopentaneacetate
(Kharismal), 2,2,4-trimethyl-4-phenyl-butanenitrile (Khusinil),
3,4,5,6,6-pentamethylhept-3-en-2-one (Koavone),
3/4-(4-hydroxy-4-methyl-pentyl) cyclohexene-1-carboxaldehyde
(Lyral),
3-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one
(Methyl lonone .gamma.), 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)
pent-1-en-3-one (Methyl lonone a Extra, Methyl Ionone .gamma.),
3-methyl-4-phenylbutan-2-ol (Muguesia), cyclopentadec-4-en-1-one
(Musk Z4),
3,3,4,5,5-pentamethyl-11,13-dioxatricyclo[7.4.0.0<2,6>]tridec--
2(6)-ene (Nebulone), 3,7-dimethyl-2,6-octadien-1-yl acetate (Neryl
Acetate), 3,7-dimethyl-1,3,6-octatriene (Ocimene),
ortho-tolylethanol (Peomosa), 3-methyl-5-phenylpentanol
(Phenoxanol), 1-methyl-4-(4-methyl-3-pentenyl)
cyclohex-3-ene-1-carboxaldehyde (Precyclemone B),
4-methyl-8-methylene-2-adamantanol (Prismantol),
2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol
(Sanjinol),
2-methyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol
(Santaliff), Terpineol, 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde
(Triplal), decahydro-2,6,6,7,8,8-hexamethyl-2H-indeno[4,5-B]furan
(Trisamber), 2-tert-butylcyclohexyl acetate (Verdox),
4-tert-butylcyclohexyL acetate (Vertenex), acetyl cedrene
(Vertofix), 3,6/4,6-dimethylcyclohex-3-ene-1-carboxaldehyde
(Vertoliff), and (3Z)-1-[(2-methyl-2-propenyl)oxy]-3-hexene
(Vivaldie).
[0016] The terms "fragrance formulation", "fragrance composition",
and "perfume composition" mean the same and refer to a consumer
composition that is a mixture of compounds including, for example,
alcohols, aldehydes, ketones, esters, ethers, lactones, nitriles,
natural oils, synthetic oils, and mercaptans, which are admixed so
that the combined odors of the individual components produce a
pleasant or desired fragrance. The fragrance formulation of the
present invention is a consumer composition comprising a compound
of the present invention. The fragrance formulation of the present
invention comprises a compound of the present invention and further
a complementary fragrance compound as defined above.
[0017] The term "fragrance product" means a consumer product
containing a fragrance ingredient that adds fragrance or masks
malodor. Fragrance products may include, for example, perfumes,
colognes, bar soaps, liquid soaps, shower gels, foam baths,
cosmetics, skin care products such as creams, lotions and shaving
products, hair care products for shampooing, rinsing, conditioning,
bleaching, coloring, dyeing and styling, deodorants and
antiperspirants, feminine care products such as tampons and
feminine napkins, baby care products such as diapers, bibs and
wipes, family care products such as bath tissues, facial tissues,
paper handkerchiefs or paper towels, fabric products such as fabric
softeners and fresheners, air care products such as air fresheners
and fragrance delivery systems, cosmetic preparations, cleaning
agents and disinfectants such as detergents, dishwashing materials,
scrubbing compositions, glass and metal cleaners such as window
cleaners, countertop cleaners, floor and carpet cleaners, toilet
cleaners and bleach additives, washing agents such as all-purpose,
heavy duty, and hand washing or fine fabric washing agents
including laundry detergents and rinse additives, dental and oral
hygiene products such as toothpastes, tooth gels, dental flosses,
denture cleansers, denture adhesives, dentifrices, tooth whitening
and mouthwashes, health care and nutritional products and food
products such as snack and beverage products. The fragrance product
of the present invention is a consumer product that contains a
compound of the present invention. The fragrance product of the
present invention contains a compound of the present invention and
further a complementary fragrance compound as defined above.
[0018] The term "improving" in the phrase "improving, enhancing or
modifying a fragrance formulation" is understood to mean raising
the fragrance formulation to a more desirable character. The term
"enhancing" is understood to mean making the fragrance formulation
greater in effectiveness or providing the fragrance formulation
with an improved character. The term "modifying" is understood to
mean providing the fragrance formulation with a change in
character.
[0019] The term "olfactory acceptable amount" is understood to mean
the amount of a compound in a fragrance formulation, wherein the
compound will contribute its individual olfactory characteristics.
However, the olfactory effect of the fragrance formulation will be
the sum of effect of each of the fragrance ingredients. Thus, the
compound of the present invention can be used to improve or enhance
the aroma characteristics of the fragrance formulation, or by
modifying the olfactory reaction contributed by other ingredients
in the formulation. The olfactory acceptable amount may vary
depending on many factors including other ingredients, their
relative amounts and the olfactory effect that is desired.
[0020] The amount of the compounds of the present invention
employed in a fragrance formulation varies from about 0.005 to
about 70 weight percent, preferably from 0.005 to about 50 weight
percent, more preferably from about 0.5 to about 25 weight percent,
and even more preferably from about 1 to about 10 weight percent.
Those with skill in the art will be able to employ the desired
amount to provide desired fragrance effect and intensity. In
addition to the compounds of the present invention, other materials
can also be used in conjunction with the fragrance formulation to
encapsulate and/or deliver the fragrance. Some well-known materials
are, for example, but not limited to, polymers, oligomers and other
adjuvants such as surfactants, emulsifiers, lipids including fats,
waxes and phospholipids, organic oils, mineral oils, petrolatum,
natural oils, perfume fixatives, fibers, starches, sugars and solid
surface materials such as zeolite and silica. Preferred polymers
may include polyacrylate, polyurea, polyurethane, polyacrylamide,
polyester, polyether, polyamide, poly(acrylate-co-acrylamide),
starch, silica, gelatin and gum Arabic, alginate, chitosan,
polylactide, poly(melamine-formaldehyde), poly(urea-formaldehyde),
or a combination thereof.
[0021] When used in a fragrance formulation these ingredients
provide additional notes to make a fragrance formulation more
desirable and noticeable, and add the perception of value. The odor
qualities found in these materials assist in beautifying and
enhancing the finished accord as well as improving the performance
of the other materials in the fragrance.
[0022] In addition, the compounds of the present invention are also
surprisingly found to provide superior ingredient performance and
possess unexpected advantages in malodor counteracting applications
such as body perspiration, environmental odor such as mold and
mildew, bathroom, and etc. The compounds of the present invention
substantially eliminate the perception of malodors and/or prevent
the formation of such malodors, thus, can be utilized with a vast
number of functional products.
[0023] Examples of the functional products are provided herein to
illustrate the various aspects of the present invention. However,
they do not intend to limit the scope of the present invention. The
functional products may include, for example, a conventional room
freshener (or deodorant) composition such as room freshener sprays,
an aerosol or other spray, fragrance diffusers, a wick or other
liquid system, or a solid, for instance candles or a wax base as in
pomanders and plastics, powders as in sachets or dry sprays or
gels, as in solid gel sticks, clothes deodorants as applied by
washing machine applications such as in detergents, powders,
liquids, whiteners or fabric softeners, fabric refreshers, linen
sprays, closet blocks, closet aerosol sprays, or clothes storage
areas or in dry cleaning to overcome residual solvent notes on
clothes, bathroom accessories such as paper towels, bathroom
tissues, sanitary napkins, towellets, disposable wash cloths,
disposable diapers, and diaper pail deodorants, cleansers such as
disinfectants and toilet bowl cleaners, cosmetic products such as
antiperspirant and deodorants, general body deodorants in the form
of powders, aerosols, liquids or solid, or hair care products such
as hair sprays, conditioners, rinses, hair colors and dyes,
permanent waves, depilatories, hair straighteners, hair groom
applications such as pomade, creams and lotions, medicated hair
care products containing such ingredients as selenium sulphide,
coal tar or salicylates, or shampoos, or foot care products such as
foot powders, liquids or colognes, after shaves and body lotions,
or soaps and synthetic detergents such as bars, liquids, foams or
powders, odor control such as during manufacturing processes, such
as in the textile finishing industry and the printing industry
(inks and paper), effluent control such as in processes involved in
pulping, stock yard and meat processings, sewage treatment, garbage
bags, or garbage disposal, or in product odor control as in textile
finished goods, rubber finished goods or car fresheners,
agricultural and pet care products such as dog and hen house
effluents and domestic animal and pet care products such as
deodorants, shampoo or cleaning agents, or animal litter material
and in large scale closed air systems such as auditoria, and
subways and transport systems.
[0024] Thus, it will be seen that the composition of the invention
is usually one in which the malodor counteractant is present
together with a carrier by means of which or from which the malodor
counteractant can be introduced into air space wherein the malodor
is present, or a substrate on which the malodor has deposited. For
example, the carrier can be an aerosol propellant such as a
chlorofluoro-methane, or a solid such as a wax, plastics material,
rubber, inert powder or gel. In a wick-type air freshener, the
carrier is a substantially odorless liquid of low volatility. In
several applications, a composition of the invention contains a
surface active agent or a disinfectant, while in others, the
malodor counteractant is present on a fibrous substrate. In many
compositions of the invention there is also present a fragrance
component which imparts a fragrance to the composition. The
fragrances stated above can all be employed.
[0025] Malodor counteracting effective amount is understood to mean
the amount of the inventive malodor counteractant employed in a
functional product that is organoleptically effective to abate a
given malodor while reducing the combined intensity of the odor
level, wherein the given malodor is present in air space or has
deposited on a substrate. The exact amount of malodor counteractant
agent employed may vary depending upon the type of malodor
counteractant, the type of the carrier employed, and the level of
malodor counteractancy desired. In general, the amount of malodor
counteractant agent present is the ordinary dosage required to
obtain the desired result. Such dosage is known to the skilled
practitioner in the art. In a preferred embodiment, when used in
conjunction with malodorous solid or liquid functional products,
e.g., soap and detergent, the compounds of the present invention
may be present in an amount ranging from about 0.005 to about 50
weight percent, preferably from about 0.01 to about 20 weight
percent, and more preferably from about 0.05 to about 5 weight
percent, and when used in conjunction with malodorous gaseous
functional products, the compounds of the present invention may be
present in an amount ranging from about 0.1 to 10 mg per cubic
meter of air.
[0026] The following are provided as specific embodiments of the
present invention. Other modifications of this invention will be
readily apparent to those skilled in the art. Such modifications
are understood to be within the scope of this invention. As used
herein all percentages are weight percent unless otherwise noted,
ppm is understood to stand for parts per million, L is understood
to be liter, mL is understood to be milliliter, g is understood to
be gram, Kg is understood to be kilogram, mol is understood to be
mole, psi is understood to be pound-force per square inch, and mmHg
be millimeters (mm) of mercury (Hg). IFF as used in the examples is
understood to mean International Flavors & Fragrances Inc., New
York, N.Y., USA.
Example I
##STR00002##
[0027] Preparation of 2-Methoxy-6-methyl-octa-1,5-diene (Formula I)
and 2-Methoxy-6-methyl-octa-2,5-diene (Formula II)
[0028] 7,7-Dimethoxy-3-methyl-oct-3-ene (378 g) was first prepared
from 6-methyl-oct-5-en-2-one (300 g) and trimethoxymethane
(CH(OCH.sub.3).sub.3) (339 g) in the presence of hydrochloride
(HCl) (3 g) at 15-35.degree. C. for about 2 hours.
2-Methoxy-6-methyl-octa-1,5-diene and
2-methoxy-6-methyl-octa-2,5-diene with a molar ratio of about 2:1
(280 g) were then prepared from 7,7-dimethoxy-3-methyl-oct-3-ene
(378 g) in the presence of phosphoric acid (H.sub.3PO.sub.4) (2.1
g) and pyridine (C.sub.5H.sub.5N) (4.2 g) at 190.degree. C. for 4-5
hours. 2-Methoxy-6-methyl-octa-1,5-diene is a mixture of E and Z
isomers with an E/Z molar ratio of about 3:2.
2-Methoxy-6-methyl-octa-2,5-diene is a mixture of (2E,5E), (2E,5Z),
(2Z,5E) and (2Z,5Z) isomers with a molar ratio of about
51:34:9:6.
[0029] Formula I obtained in the above preparation possessed the
NMR spectral characteristics of:
[0030] .sup.1H NMR (400 MHz, CDCl.sub.3): 5.10 (m, 1H), 3.90 (s,
2H), 3.55 (s, 3H), 1.95-2.35 (m, 6H), 1.70 (s, 3H), 0.95-1.05 (m,
3H)
[0031] Formula II obtained in the above preparation possessed the
NMR spectral characteristics of:
[0032] .sup.1H NMR (400 MHz, CDCl.sub.3): 5.10 (m, 1H), 4.30-4.45
(m, 1H), 3.55 (s, 3H), 2.65-2.80 (m, 2H), 2.00 (m, 2H), 1.70 (s,
3H), 1.65 (s, 3H), 0.95-1.05 (m, 3H)
[0033] The mixture of Formula I and Formula II was described as
having strong herbal, ocean breezy and ozoney notes.
Example II
##STR00003##
[0034] Preparation of 2-Ethoxy-6-methyl-octa-1,5-diene (Formula
III) and 2-Ethoxy-6-methyl-octa-2,5-diene (Formula IV)
[0035] 2-Ethoxy-6-methyl-octa-1,5-diene and
2-ethoxy-6-methyl-octa-2,5-diene with a molar ratio of about 3:1
(276 g) were similarly prepared as above in EXAMPLE I from
6-methyl-oct-5-en-2-one (300 g) and triethyloxymethane
(CH(OCH.sub.2CH.sub.3).sub.3) (475 g).
2-Ethoxy-6-methyl-octa-1,5-diene is a mixture of E and Z isomers
with an E/Z molar ratio of about 3:2.
2-Ethoxy-6-methyl-octa-2,5-diene is a mixture of (2E,5E), (2E,5Z),
(2Z,5E) and (2Z,5Z) isomers with a molar ratio of about
21:14:9:6.
[0036] Formula III obtained in the above preparation possessed the
NMR spectral characteristics of:
[0037] .sup.1H NMR (400 MHz, CDCl.sub.3): 5.15 (m, 1H), 3.85 (m,
2H), 3.70 (q, J=7.0 Hz, 2H), 1.95-2.25 (m, 6H), 1.65 (s, 3H), 1.3
(t, J=7.0 Hz, 3H), 1.0 (t, J=7.2 Hz, 3H)
[0038] Formula IV obtained in the above preparation possessed the
NMR spectral characteristics of:
[0039] .sup.1H NMR (400 MHz, CDCl.sub.3): 5.15 (m, 1H), 4.30-4.50
(m, 1H), 3.60-3.80 (m, 2H), 2.65-2.85 (m, 2H), 2.00 (m, 2H), 1.80
(s, 3H), 1.65 (s, 3H), 1.3 (t, J=7.0 Hz, 3H), 1.0 (t, J=7.2 Hz,
3H)
[0040] The mixture of Formula III and Formula IV was described as
having floral but weak notes.
Example III
##STR00004##
[0041] Preparation of 2-Methoxy-6-methyl-oct-1-ene (Formula V) and
2-Methoxy-6-methyl-oct-2-ene (Formula VI)
[0042] 6-Methyl-oct-5-en-2-one (220 g) was hydrogenated with
palladium on carbon (Pd/C) (1%) under hydrogen (H.sub.2) (200 psi)
at 60.degree. C. to provide 6-methyl-octan-2-one (215 g). Following
the same reaction scheme as in EXAMPLE I,
2-methoxy-6-methyl-oct-1-ene and 2-methoxy-6-methyl-oct-2-ene with
a molar ratio of about 2:3 (154 g) were then prepared from
6-methyl-octan-2-one (215 g) and trimethoxymethane (240 g).
2-Methoxy-6-methyl-oct-2-ene is a mixture of E and Z isomers with
an E/Z molar ratio of about 9:1,
[0043] Formula V obtained in the above preparation possessed the
NMR spectral characteristics of:
[0044] .sup.1H NMR (400 MHz, CDCl.sub.3): 3.85 (s, 2H), 3.50 (s,
3H), 1.90-2.10 (m, 2H), 1.10-1.60 (m, 7H), 0.90 (m, 6H)
[0045] Formula VI obtained in the above preparation possessed the
NMR spectral characteristics of:
[0046] .sup.1H NMR (400 MHz, CDCl.sub.3): 4.35-4.45 (m, 1H), 3.50
(s, 3H), 2.00 (m, 2H), 1.80 (s, 3H), 1.10-1.60 (m, 5H), 0.90 (m,
6H)
[0047] The mixture of Formula V and Formula VI was described as
having floral but weak notes.
Example IV
##STR00005##
[0048] Preparation of 2-Methoxy-6-methyl-octane (Formula VII)
[0049] 2-Methoxy-6-methyl-oct-1-ene and
2-methoxy-6-methyl-oct-2-ene prepared in EXAMPLE III (300 g) were
hydrogenated with palladium on carbon (1%) under hydrogen (200 psi)
at 80.degree. C. to provide 2-methoxy-6-methyl-octane (177 g).
[0050] Formula VII obtained in the above preparation possessed the
NMR spectral characteristics of:
[0051] .sup.1H NMR (400 MHz, CDCl.sub.3): 3.30 (s, 3H), 3.25 (m,
1H), 1.20-1.55 (m, 7H), 1.10 (d, J=6.2 Hz, 3H), 1.05-1.15 (m, 2H),
0.80-0.90 (m, 6H)
[0052] Formula VII was described as having herbal, floral but very
weak notes.
Example VI
[0053] The fragrance properties of the above compounds (i.e.,
Formula I-VII) were evaluated using odor strength of 0 to 10, where
0=none, 1=extremely weak, 5=moderate, 10=extremely strong. Averaged
scores are reported in the following:
TABLE-US-00001 Compound Odor Profile Strength Mixture of Formula
I/II Strong herbal, ocean breezy and 10 ozoney Mixture of Formula
III/IV Floral but weak 5 Mixture of Formula V/VI Floral but weak 4
Mixture of Formula VII Herbal, floral but very weak 3
[0054] The mixture of Formula I and Formula II exhibited
particularly desirable and strong odors, superior to other close
analogs. Such advantageous properties are unexpected.
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