SLOW RELEASE OF FRAGRANT COMPOUNDS IN PERFUMERY USING 2-BENZOYL BENZOATES, 2-ALKANOYL BENZOATES OR alpha -KETO ESTERS

摘要

The present invention describes a fragrance delivery system which releases fragrant alcohols upon exposure to light. Said system comprises 2-benzoyl benzoates of general formulae (I) or (II) which can comprise various substituents R>1<-R>5< as defined in the application and a substituent R* which is the organic part of a fragrant alcohol R*OH. In a further embodiment, the present invention describes a fragrance delivery system which releases fragrant aldehydes or ketones and/or fragrant compounds containing an olefin function. This system comprises alpha -keto esters of formula (III) in which R'* and R''* have the meaning as defined in the application and which are generally, in case of R'*, an alkyl group carrying an abstractable hydrogen in gamma -position relative to the alpha -keto function and carrying a moiety from which is derived a fragrant compound containing an olefin function, and, in case of R''*, the organic part of a primary or secondary alcohol from R''*OH which is derived a fragrant aldehyde or ketone.