Esters with musky odor and their use in perfumery

Abstract

The compounds of formula (I) in which the symbols R<1>, R<2>, R<3> and R<4> represent independently from each other a hydrogen atom or a methyl or ethyl group, the symbol X represents an oxygen atom or an alkylene group of formula (A) in which n is an integer from 1 to 3, the symbols R<6> and R<7> represent each a hydrogen atom or a methyl or ethyl group, and R<5> represents an alkyl or alkoxy group from C1 to C4, linear or branched, an alkenyl group from C2 to C4, linear or branched, or a group of formula: -(O)C-Y-R8 in which Y has the same meaning as X and R<8> is a linear or branched alkyl group from C1 to C4 or a linear or branched alkenyl group from C2 to C4, are novel compounds showing musky odors and which confer musky-velvety, voluminous and very tenacious notes to the products to which they are added.

What is claimed is:  
     
       1. A compound of formula                    
       in which the symbols R 1 , R 2 , R 3  and R 4  represent independently from each other a hydrogen atom or a methyl or ethyl group, the symbol X represents an oxygen atom or an alkylene group of formula                    
       in which n is an integer from 1 to 3, the symbols R 6  and R 7  represent each a hydrogen atom or a methyl or ethyl group, and R 5  represents an alkyl or alkoxy group from C 1  to C 4 , linear or branched, an alkenyl group from C 2  to C 4 , linear or branched, or a group of formula                    
       in which Y has the same meaning as X and R 8  is a linear or branched alkyl group from C 1  to C 4  or a linear or branched alkenyl group from C 2  to C 4 . 
     
     
       2. A compound according to  claim 1 , of formula                    
       wherein X is an oxygen atom or an unsubstituted methylene or ethylene group and R 5  is a group as defined in  claim 1  and having from 1 to 3 carbon atoms. 
     
     
       3. A compound selected from the group consisting of 1-[(3,3-dimethyl-1-cyclohexyl)ethoxycarbonyl]methyl propanoate, 1-[(3,3-dimethyl-1-cyclohexyl) ethoxycarbonyl]methyl butanoate, 1-(3,3-dimethyl-1-cyclohexyl)ethyl 4-oxohexanoate, 1-(3,3-dimethyl-1-cyclohexyl)ethyl 5-oxohexanoate, 1-[(3,3-dimethyl-1-cyclohexyl)ethoxycarbonyl]methyl methyl oxalate, 1-[(3,3-dimethyl-1-cyclohexyl) ethoxycarbonyl]methyl 2-propenoate, and 1-[(3,3-dimethyl-1-cyclohexyl) ethoxycarbonyl]methyl 2-butenoate. 
     
     
       4. 1-[(3,3-Dimethyl-1-cyclohexyl)ethoxycarbonyl]methyl propanoate. 
     
     
       5. A compound according to  claim 1 , in the form of the stereoisomer of configuration (1S,1′R) or of a mixture containing a preponderant amount of this isomer together with at least one of its other stereoisomers. 
     
     
       6. Perfuming composition or perfumed article containing as a perfuming ingredient a compound according to  claim 1 . 
     
     
       7. Perfumed article according to  claim 6 , in the form of a perfume or a cologne, a soap, a bath or shower gel, a shampoo or other hair care product, a cosmetic preparation, a deodorant or antiperspirant, an air freshener, a detergent or fabric softener, or an all-purpose cleaner. 
     
     
       8. A method for the preparation of a perfuming composition or of a perfumed product, wherein there is added to said composition or product a compound according to  claim 1 . 
     
     
       9. A compound of formula ( III )                    
       wherein X is an oxygen atom and R 5  is a group as defined in  claim 1  and having from 1 to 3 carbon atoms. 
     
     
       10. The method of  claim 8 , wherein the compound is added in an amount sufficient to impart an odor of the musky type accompanied by a slight fruity-ambrette connotation.