Method for imparting, improving, enhancing or altering the odor characteristics of a fragrance composition or cosmetic product and fragrance composition or cosmetic product

摘要

PROBLEM TO BE SOLVED: To impart walnut-type fragrance characteristics having a combination of fresh and fruity notes by adding ethyl 3-methyl-2-oxopentanoate in the form of an R- or S-configuration enantiomer or a mixture thereof as an aromatizing component. ;SOLUTION: Ethyl 3-methyl-2-oxopentanoate is used in the form of an R- or S-configuration enantiomer or a mixture thereof in an aromatizing composition or perfumes and cosmetics as an aromatizing component in concentrations of 0.1-10 wt.% Ethyl 3-methyl-2-oxopentanoate is obtained by continuously oxidizing (+)-ethyl (2S, 3S)-2-hydroxy-3-methylpentanoate and (+)-ethyl (2S, 3R)-2- hydroxy-3-methylpentanoate using sodium acetate and pyridinium chlorochromate.;COPYRIGHT: (C)1999,JPO