SENECIOIC ACID UNSATURATED ESTER AND PERFUMERY COMPOSITION CONTAINING THE SAME

摘要

NEW MATERIAL:The senecioic acid unsaturated ester of formula I (R is 5-6C alkenyl). EXAMPLE:3-Methyl-2-butenyl senecioate. USE:It has characteristic grassy, woody, floral or fruity fragrance, and is useful as an agent for imparting or modifying aroma or fragrance. It is used as an additive of, e.g. cosmetic, soap, detegent, food, drink, drug, chewing gum, etc. PROCESS:The compound of formula I can be prepared by adding a 5-6C unsaturated alcohol to the senecioic acid lower alcohol ester of formula II (R' is lower alkyl) in the presence of an ester exchange catalyst, and heating preferably at 80-180 deg.C to effect ester exchange reaction. The 5-6C unsaturated alcohol is, e.g. 3-methyl-3-butenol, etc., and its amount is preferably 0.5-2mol per 1mol of the senecioic acid lower alcohol ester.