Method of using alpha-keto enamine derivatives as ingredients and products incorporating same

A method of cooling a consumer's skin or mouth which comprises contacting an effective amount of a food, cosmetic, perfume, or pharmaceutical composition to the consumer's skin or mouth to provide a cooling effect, wherein the composition comprises one or more compounds each of the general formula:

• wherein R1 is selected from the group consisting of N-Pyrrolidinyl, N-Pyridinyl, N-(amino-diethyl), N-(2-carboxy-pyrrolidinyl), piperidinyl, or N-(2-Methoxycarbonyl-pyrrolidinyl);
• R2 is selected from the group consisting of hydrogen or methyl;
• X is selected from the group consisting of methylene, ethylidene, 1-Propylidene, or oxy radical;
• and Y is selected from the group consisting of methylene, ethylidene, 1-propylidene, oxy radical, ethan-1,2-diyl, ethen-1,2-diyl, propan-1,2-diyl, or ethan-1-oxy-1-yl, provided that when R1 is N-pyrrolidinyl, X is methylene, and Y is ethylidene then R2 cannot be hydrogen, and provided that when R1 is N-pyrrolidinyl, and X and Y are each methylene, then R2 cannot be methyl.