Cyclopropyl carboxylic acid ester and uses thereof in imparting, augmenting and enhancing aromas

Abstract: Described is the cyclopropyl carboxylic acid ester defined according to the structure: and uses thereof in augmenting, enhancing or imparting aromas in or to perfume compositions, colognes and perfumed articles. The compound having the structure: is a novel compound.

Description: The present invention relates to the compound having the structure : cis-3-hexenyl butyrate and cis-3-hexenyl-iso-butyrate are disclosed in "Perfume and Flavor Chemicals", Steffen Arctander, Montclair, N.Y. (U.S.A.), 1969, 1613 - 1614. The present invention provides the cyclopropyl carboxylic acid ester defined according to the structure: The compound defined according to the structure: is a novel compound. The compositions of matter of our invention produced according to the processes disclosed in the instant specification are capable of augmenting, enhancing or providing strong, persistent, herbaceous, "rain forest", green, onion and garlic aromas to perfume compositions, colognes and perfumed articles (e.g., solid or liquid, anionic, cationic, nonionic or zwitterionic detergents, fabric softener articles, drier-added fabric softener articles, fabric softener compositions, cosmetic powders, hair preparations, perfumed polymers). The cyclopropyl carboxylic acid ester of our invention may be prepared by any one of a number of processes. Thus, a preferred process is to react cyclopropyl carboxylic acid having the structure: with cis-3-hexenol having the structure: according to the reaction: Preferably, this reaction is carried out in the presence of a protonic acid such as paratoluene sulfonic acid. The reaction is carried out at reflux conditions, for example, between 110 and 130°C at atmospheric pressure while simultaneously azeotropically removing the water of reaction. The reaction time varies between 1 hour and 5 hours. At the end of the reaction, the reaction mass is washed with water and is then neutralized with, for example, 10% aqueous sodium bicarbonate. The organic phase is separated from the aqueous phase and the organic phase is dried over anhydrous magnesium sulfate and then fractionally distilled, for example, on a 304mm (12 inch) Goodloe packed column. Alternatively, the cyclopropyl carboxylic acid ester of our invention may be prepared according to other esterification reactions well known to those skilled in the art, for example, those disclosed in U.S. Letters Patent No. 3,925,460 issued on December 9, 1975, the specification for which is incorporated by reference herein. The compound having the structure: of our invention has the following fragrance properties: "an intense, long lasting herbaceous, "rain forest " , green, onion and garlic aroma " . According to this invention there is also provided a process for augmenting, enhancing or imparting an aroma in or to a consumable material, which is, in the alternative, a perfume composition, a perfumed article or a cologne comprising the step of intimately admixing with said consumable material an aroma augmenting, enhancing or imparting quantity and concentration of the ester having the structure: According to this invention there is further provided a consumable material which is, in the alternative, a perfumed composition, a perfumed article or a cologne comprising a consumable material base and intimately admixed therewith an aroma or augmenting, enhancing or imparting quantity and concentration of the cyclopropyl carboxylic acid ester having this structure: Conveniently the consumable article is a perfume composition. Preferably the consumable material is a perfumed article. Advantageously, the consumable material is a cologne consisting of water, alcohol and an aroma augmenting, enhancing or imparting quantity and concentration of a compound defined according to the structure: Preferably the consumable material is a perfumed microporous polymer and contained within the interstices of said microporous polymer, the compound having this structure: Conveniently, the consumable article is a perfumed article, and the perfumed article is a solid or liquid anionic, cationic, nonionic or zwitterionic detergent. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is the GLC profile for the crude reaction product of Example I containing the compound having the structure: (conditions: 50 meter x 0.32 mm methyl, 50 meter x 0.32 mm methyl silicon column programmed from 75 up to 225°C at 2°C per minute). Figure 2 is the NMR spectrum for bulked distillation fractions 8-22 of the distillation of the reaction product of Example I containing the compound having the structure: Figure 3 is a partial side elevation view and partial sectional view of an apparatus for forming polymer pellets containing the cyclopropyl carboxylic acid ester of our invention. Figure 4 is a section taken along line 4-4 of Figure 3. DETAILED DESCRIPTION OF THE DRAWINGS Referring to Figure 1, Figure 1 is the GLC profile for the reaction product of Example I containing the compound having the structure: The peak indicated by reference numeral 10 is the peak for the compound having the structure: The peak indicated by reference numeral 11 is for the reaction solvent, toluene. Referring to Figures 3 and 4, the apparatus used in producing polymeric fragrances containing the cyclopropyl carboxylic acid ester of our invention comprises a device for forming scented polyolefin (for example) pellets, which comprises a vat or container 212 into which a mixture of polyolefin such as polyethylene and an aromatic substance or scented material is placed (in this case, the cyclopropyl carboxylic acid ester of our invention). The container is closed by an air-tight lid 228 and the air-tight lid 228 is clamped to the container 212 by bolts 265 . A stirrer 273 traverses the lid or cover 228 in an air-tight manner and is rotated in a suitable manner. Container 212 having heating coils 212A which are supplied with electric current through cable 224 from a rheostat or control 216 is operated to maintain a temperature inside the container 212 such that polyethylene or other thermoplastic polymer in the container will be maintained in the molten or liquid state. It has been found advantageous to employ a colorless, odorless polymer (e.g., polyethylene) having a melting point in the range of 93-138°C (200°-280°F). The heater 212A is operated to maintain the upper portion of the container 212 within a temperature range of from 121-177°C (250°-350°F). The bottom portion of the container is heated by means of heating coils 212A heated through control 220 connected thereto through a connecting wire 222 to maintain the lower portion of the container within a temperature range of from 121-177°C (250°-350°F). Thus, polymer (e.g., polyethylene) is added to container 212 and is heated from 10-12 hours whereafter a scented aroma imparting material (the cyclopropyl carboxylic acid ester of our invention) is added quickly to the melt. The material must be compatible with the polyolefin and forms a homogeneous liquid melt therewith. The scented material is of a type for the particular aroma desired and formulated specifically for the scenting purpose for which the polyolefin will be employed. Generally, 5-30% by weight of the scented material (containing the cyclopropyl carboxylic acid ester of our invention) is added to the polyolefin. After the scent imparting material (e.g., a composition containing the cyclopropyl carboxylic acid ester of our invention) is added to the container 212 , the mixture is stirred for a few minutes, for example, 5-15 minutes, and maintained within the temperature range as indicated, supra, by means of heating coils 212A . The controls 216 and 220 are connected, respectively, through cables 214 and 222 , respectively, to heating coils 212A . The said controls 216 and 220 are also connected through cables 224 and 226 , respectively, to a suitable power supply of electric current for supplying the electric power to the heating coils 212A for heating purposes. Thereafter, the valve "V" is opened permitting the mass to flow outwardly through conduit 218 / 232 having a multiplicity of orifices 234 , adjacent to the lower side thereof. The outer end of the conduit 218 / 232 is closed so that the liquid polymer (e.g., polyolefin) and aroma imparting material (e.g., a mixture containing the cyclopropyl carboxylic acid ester of our invention) will continuously drop through orifices 234 downwardly from conduit 232 . During this time, the temperature of the polymer (e.g., polyolefin) and aroma imparting material (e.g., a mixture containing the cyclopropyl carboxylic acid ester of our invention) is accurately controlled so that a temperature in the range of 99-135°C (210°-275°F) will exist in the conduit 218 / 232 . The regulation of the temperature through the controls 216 and 220 is essential in order to insure temperature balance to provide for the continuous dropping or dripping of molten polymer (e.g., polyethylene) and scenting material (e.g., the cyclopropyl carboxylic acid ester of our invention) mixture through the orifices 234 at a rate which will insure the formation of droplets 236 which will fall downwardly onto a moving conveyor belt 238 caused to run between conveyor wheels 240 and 242 . When the droplets 236 fall onto the conveyor 238 , they form pellets 244 which harden almost instantaneously and fall off the end of the conveyor 238 into a container 245 and utilized in processes as illustrated, infra. A feature of this aspect of the process of our invention is the provision for moistening the conveyor belt 238 to insure rapid formation of the solid polymeric (e.g., polyolefin) scented pellets 244 without sticking to the belt. The belt 238 is advantageously fabricated of a material which will not normally stick to a melted plastic, but a moistening means 248 insures a sufficiently cold temperature of the belt surface for an adequate formation of the pellets 244 . The adequate moistening means comprises a container 250 which is continuously fed with water 254 to maintain a level for moistening a sponge element 256 which bears against the exterior of the belt 238 . EXAMPLE I PREPARATION OF THE CIS-3-HEXENYL ESTER OF CYCLOPROPANE CARBOXYLIC ACID Into a 2 liter, three-neck reaction flask equipped with a Bidwell trap, mechanical stirrer with Teflon blade, Thermowell with thermocouple, reflux condenser and heating mantle are placed the following materials: cyclopropane carboxylic acid having the structure: cis-3-hexenol .... 300 grams (3.0 moles); paratoluene sulfonic acid .... 5.7 grams; and toluene .... 240 ml. The reaction mass with stirring is heated to reflux temperature at atmospheric pressure (116°C) and azeotropic removal of water via the Bidwell trap is begun. Azeotropic removal of water is continued until the pot temperature of the reaction mass is 140°C. A total of 55 grams of water (3.05 moles) is removed. The reaction mass is then cooled to room temperature and the reaction mixture weighing 738 grams and having a pH of 3 is washed with 370 grams of warm (45°C) water. The resulting product now exists in two phases: an aqueous phase and an organic phase. The aqueous phase is separated from the organic phase and is discarded. The organic phase is then washed with 500 grams of 10% aqueous sodium bicarbonate solution. The organic phase is then separated from the aqueous phase and the organic phase, weighing 709 grams and having a pH of 7.5 is fractionally distilled on a Goodloe column, yielding the following fractions: Fraction Number Vapor Temperature (°C) Liquid Temperature (°C) Vacuum mm/Hg. Pressure Reflux Ratio Weight of Fraction % Product 1 23/88 23/80 3 1/9 150 solvent 2 92 92 1 9/1 11 75 3 83 88 1 9/1 16 89 4 78 89 1 9/1 17 99 5 78 90 1 9/1 14 99 6 79 90 1 9/1 16 99 7 81 90 1 9/1 15 99 8 82 90 1 9/1 16 99 9 81 90 1 1/1 21 99 10 82 90 1 1/1 20 99 11 81 90 1 1/1 17 99 12 87 90 1 1/1 22 99 13 83 90 1 1/1 20 99 14 82 90 1 1/1 22 99 15 82 89 1 1/1 22 99 16 82 89 1 1/1 22 99 17 83 89 1 1/1 26 99 18 84 90 1 1/1 20 99 19 83 89 1 1/1 20 99 20 85 90 1 1/4 25 99 21 87 90 1 1/4 29 99 22 88 97 1 1/4 28 99 23 87 99 1 1/4 28 99 24 88 111 1 1/4 19 99 A total of 461 grams of product was obtained from the distillation which represents a chemical yield of 91%. Fractions 8-22 are bulked. Bulked distillation Fractions 8-22 have an intense, long lasting, herbaceous, "rain forest", green, onion and garlic aroma. Bulked fractions 8-22 consist of the compound having the structure: as confirmed by GLC, NMR, mass spectral and IR analyses. EXAMPLE II PERFUME FORMULATION The following woody cologne perfume formulation is prepared: The compound having the structure: prepared according to Example I, bulked distillation fractions 8-22, imparts to this woody cologne formulation strong, persistent herbaceous, "rain forest " , green, onion and garlic undertones. Accordingly, the perfume composition of Example II is described as: "a woody cologne aroma with strong, persistent herbaceous, "rain forest " , green, onion and garlic undertones " . EXAMPLE III PREPARATION OF COSMETIC POWDER COMPOSITION Cosmetic powder compositions are prepared by mixing in a ball mill 100 grams of talcum powder with 0.25 grams of each of the substances set forth in Table I below. Each of the cosmetic powder compositions has an excellent aroma as described in Table I below: EXAMPLE IV PERFUMED LIQUID DETERGENTS Concentrated liquid detergents (Lysine salt of n-dodecybenzene sulfonic acid as more specifically described in U.S. Patent No. 3,948,818 issued on April 6, 1976 incorporated by reference herein) with aroma nuances as set forth in Table I of Example III are prepared containing 0.10%, 0.15%, 0.20%, 0.25%, 0.30% and 0.35% of the substance set forth in Table I of Example III. They are prepared by adding and homogeneously mixing the appropriate quantity of substance set forth in Table I of Example III in the liquid detergent. The detergents all possess excellent aromas as set forth in Table I of Example III, the intensity increasing with greater concentrations of substances as set forth in Table I of Example III. EXAMPLE V PREPARATION OF COLOGNE AND HANDKERCHIEF PERFUMES Compositions as set forth in Table I of Example III are incorporated into colognes at concentrations of 2.0%, 2.5%, 3.0%, 3.5%, 4.0% and 5.0% in 80%, 85%, 90% and 95% aqueous food grade ethanol solutions; and into handkerchief perfumes at concentrations of 15%, 20%, 25% and 30% (in 80%, 85%, 90% and 95% aqueous food grade ethanol solutions). Distinctive and definitive fragrances as set forth in Table I of Example III are imparted to the colognes and to the handkerchief perfumes at all levels indicated. The features disclosed in the foregoing description in the following claims and/or in the accompanying drawings may both separately and in any combination thereof, be material for realising the invention in diverse forms thereof.

Claims: The cyclopropyl carboxylic acid ester having the structure: A process for augmenting, enhancing or imparting an aroma in or to a consumable material which is, in the alternative, a perfume composition, a perfumed article or a cologne comprising the step of intimately admixing with said consumable material an aroma augmenting, enhancing or imparting quantity and concentration of the ester of Claim 1. A consumable material which is, in the alternative, a perfume composition, a perfumed article or a cologne comprising a consumable material base and intimately admixed therewith an aroma augmenting, enhancing or imparting quantity and concentration of the cyclopropyl carboxylic acid ester having the structure: of Claim 1. The consumable material of Claim 3 wherein the consumable material is a perfume composition. The consumable material of Claim 3 wherein the consumable material is a perfumed article. The consumable material of Claim 3 wherein the consumable material is a cologne consisting of water, alcohol and an aroma augmenting, enhancing or imparting quantity and concentration of a compound defined according to the structure: The consumable material of Claim 3 wherein the consumable material is a perfumed microporous polymer and contained within the interstices of said microporous polymer, the compound having the structure: The process of Claim 2 wherein the consumable material is a perfumed article, and the perfumed article is a solid or liquid anionic, cationic, nonionic or zwitterionic detergent. A process for preparing the cyclopropyl carboxylic acid ester of Claim 1, comprising the step of reacting cyclopropyl carboxylic acid having the structure: with cis-3-hexenol having the structure: according to the reaction:

Inventors: EVANS MARC D, HANNA MARIE R, MALCOLM GAIL I, MONTELEONE MICHAEL G, EVANS, MARC D., HANNA, MARIE R., MALCOLM, GAIL I., MONTELEONE, MICHAEL G.
Applicants: INT FLAVORS & FRAGRANCES INC, INTERNATIONAL FLAVORS & FRAGRANCES INC.
Application year: 1998
Main classification: C07C69
IPC codes: C07C69, C11D3, C11B9