Abstract:
This invention is directed to perfume compositions comprising esters of mixtures of tricyclo[5.2.1.0 2 .6 ]decane carboxylic acids of the general formulas: ##STR1## wheren R represents a saturated or unsaturated linear or branched aliphatic hydrocarbon radical having from about 1 to 5 carbon atoms; as well as the use of the compositions as odorants.

Description:
BACKGROUND OF THE INVENTION 
     Certain esters of tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic acids are known and have been described in the literature. See, for example, U.S. Pat. No. 2,688,627 (Standard Oil) ref. Chem. Abstr. 49, 12 541e and J. Gen. Chem. UdSSR 31, 1324 (1961) wherein the methyl and ethyl esters have been described. However, applicants have surprisingly discovered that these methyl and ethyl esters, as well as previously unknown unsaturated aliphatic esters, are useful as perfuming agents in perfume compositions. 
     OBJECTS OF THE INVENTION 
     It is an object of this invention to provide perfuming agents and perfume compositions having characteristic fragrances and excellent adhesion. 
     It is also an object of this invention to provide perfuming agents and perfumery compositions comprising esters of mixtures of tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic acids. 
     It is a further object of this invention to provide unsaturated aliphatic esters of mixtures of tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic acids. 
     These and other objects of the invention will become more apparent in the discussion below. 
     DESCRIPTION OF THE INVENTION 
     It has been found that esters of mixtures of tricyclo[5.2.1.0 2 .6 ]decane carboxylic acids of the general formulas ##STR2## wherein R represents a saturated or unsaturated linear or branched aliphatic hydrocarbon radical having from about 1 to 5 carbon atoms, constitute valuable new perfuming agents which can be used to advantage as perfuming agents in compositions for perfuming technical and cosmetic preparations. Useful perfume compositions comprise from about 1 to 50 percent by weight, based on the total weight of the perfume compositions of the esters of mixtures of tricyclo[5.2.1.0 2 .6 ]-decane-3/4-carboxylic acids, i.e., esters of mixtures of tricyclo[5.2.1.0 2 .6 ]decane-3-carboxylic acid and tricyclo-[5.2.1.0 2 .6 ]decane-4-carboxylic acid. 
     The radical R can represent a saturated or unsaturated linear or branched aliphatic hydrocarbon radical having from about 1 to 5 carbon atoms. More particularly, these are alkyls having 1 to 5 carbon atoms, alkenyl having 3 to 5 carbon atoms and alkynyls having 3 to 5 carbon atoms. Mixtures of esters of Formulas I and II wherein R is an unsaturated hydrocarbon radical are of interest, and mixtures of esters wherein R represents the allyl radical --CH 2  -CH═CH 2  or the propargyl radical --CH 2  -C.tbd.CH, are of particular interest. The perfuming agents and perfume compositions of this invention can also be comprised of more than one mixture of esters of Formulas I and II. For example, a useful perfuming agent of perfumery composition may comprise a mixture of esters of Formulas I and II wherein R is an allyl radical as well as a mixture of said esters wherein R is a propargyl radical. 
     The preparation of the esters to be used according to the invention can be effected according to generally known esterification methods by reacting tricyclo[5.2.1.0 2 .6 ]-decane-3/4-carboxylic acids, or their acid chlorides, with alcohols corresponding to the desired R radical in the presence of condensing agents, such as P 2  O 5 . The mixture of the acids can be obtained by hydroformylation of tricyclo[5.2.1.0 2 .6 ]-dec-3-ene with subsequent oxidation, corresponding to the following reaction scheme: ##STR3## 
     The mixture of tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic acids obtained in this manner is available commercially as the product known under the name TCD-Carboxylic Acid S (from Hoechst AG). 
     Another method of preparing the esters to be used according to the invention or their underlying acids comprises the carbonylation reactions according to Reppe or Koch. The reaction takes place according to the following scheme: ##STR4## 
     If the reaction is carried out in alcohol instead of in an aqueous medium, the corresponding esters are obtained directly. The acids or esters obtained are, as with reaction shceme III, a mixture of different stereoisomers of the tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic acids or their esters. This mixture is not separated, and the mixture comprises the perfuming agent to be used according to the invention. 
     The esters of the mixtures of tricyclo[5.2.1.0 2 .6 ]-decane-3/4-carboxylic acids to be used according to the invention are valuable perfuming agents having characteristic aromas. They can be easily combined to new and interesting aromas. The allyl and propargyl esters are of particular importance because of their special aromas. The propargyl esters have an interesting meaty-walnut aroma, while the allyl esters have an ocimene-styrolyl aroma. These aromas are particularly suitable for the development of novel perfume compositions. 
     One advantage of the perfuming agents, or perfumes, of this invention is that they are distinguished by particularly intensive and lasting fragrances of high quality and fullness. Other advantages are that the perfuming agents can be combined very satisfactorily to form perfume compositions and novel fragrances and that they also have a high degree of adherence. 
     The esters of the mixtures of the tricyclo[5.2.1.0 2 .6 ]-decane-3/4-carboxylic acids to be used according to the invention can be mixed with other perfumes in various quantitative ratios to form new perfume compositions. In general, the esters of the mixture of the tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic acids in the perfume compositions will comprise from about 1 to 50 percent by weight, based on the total weight of the perfuming composition. The remainder of the composition is comprised of conventional perfumery constituents. Perfume compositions of this type can be used directly as a perfume or, alternatively, for perfuming cosmetics, such as creams, lotions, toilet waters, aerosols, mouthwashes, toilet soaps, technical articles, such as detergents and cleansers, disinfectants, and textile finishing agents, and the like. 
     The following examples are intended to explain further the subject of the invention, but without limiting the invention to these examples. 
    
    
     EXAMPLE 1 
     Production of Tricyclo[5.2.1.0 2 .6 ]decane-3/4-Carboxylic Propargyl Ester 
     An amount of TCD Carboxylic Acid S, which comprises a mixture of tricyclo[5.2.1.0 2 .6 ]decane-3/4carboxylic acids, was reacted with an equimolar amount of propargyl alcohol in the presence of a condensing agent, P 2  O 5 . 
     The product, which was recovered by fractionation in vacuo, was found to have a boiling point of 100° to 110° C./0.013 m bar and a refractive index of n D   20  =1.506. 
     The product was distinguished by a meaty-walnut aroma that was intensive and had long adherence. 
     In a similar manner the following additional compounds were produced: 
     (1) Tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic, Allyl Ester B.P.=74°-81° C. (0.07 m bar); refractive index of n D   20  =1.497; ocimene-styrolyl aroma. 
     (2) Tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic, Ethyl Ester B.P.=60°-63° C. (0.013 m bar); refractive index of n D   20  =1.489 (Literature: B.P.=103° C. [4 m bar] and refractive index of n D   20  =1.486); fruity, marmalade aroma. 
     (3) Tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic, n-Propyl Ester B.P.=94°-100° C. (0.013 m bar); refractive index of n D   20  =1.488; technical meaty aroma. 
     (4) Tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic, Isopropyl Ester B.P.=67°-72° C. (0.07 m bar); refractive index of n D   20  =1.483; raspberry aroma. 
     (5) Tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic, n-Butyl Ester B.P.=78°-80° C. (0.07 m bar); refractive index of n D   20  =1.484; slightly fruity aroma. 
     (6) Tricyclo[5.2.1.0 2 .6 ]decane-3/4-carboxylic, t-Butyl Ester B.P.=92°-95° C. (0.07 m bar); refractive index of n D   20  =1.481; slightly fruity aroma. 
     The following represent examples of perfume compositions: 
     EXAMPLE 2 
     
         ______________________________________Hyacynth Complex:                  Parts byComponent              weight______________________________________Tricyclo[5.2.1.0.sup.2.6 ]decane-3/4carboxylic, allyl ester                  100.0Cis-β-hexenyl acetate                  200.0Dimethylbenzylcarbinyl acetate                  120.0Cinnamic alcohol       100.0Linalool               100.0Geraniol               100.0Methyljonone           80.0Terpineol              70.0Styrax oil             60.0Citronellol            50.0Galbanum oil           20.0                  1,000.0______________________________________ 
    
     EXAMPLE 3 
     
         ______________________________________Chypre Base                  Parts byComponent              Weight______________________________________Tricyclo[5.2.1.0.sup.2.6 ]decane-3/4-carboxylic, propargyl ester                  100.0Bergamotte oil         440.0Linalool               150.0Coumarin               90.0Oak moss absolute      50.0Isobutyl quinoline     50.0Linalyl acetate        50.0Vetiver oil            20.0Sandalwood oil         10.0Mandarin oil           10.0Patchouli oil          10.0Lavender oil           10.0Tonka absolute         10.0                  1,000.0______________________________________ 
    
     The preceding specific embodiments are illustrative of the practice of the invention. It is to be understood, however, that other expedients known to those skilled in the art or disclosed herein, may be employed without departing from the spirit of the invention or the scope of the appended claims.