The present invention describes a fragrance delivery system which releases fragrant aldehydes or ketones and/or fragrant compounds containing an olefin function upon exposure to light. This system comprises &agr;-keto esters of formula
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 &ggr;-position relative to the &agr;-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.
本发明描述了一种香气释放系统,该系统在暴露于光线下时释放带有芳香基团的醛或酮和/或含有烯烃功能的芳香化合物。该系统包括式中的α-
酮酯,其中R′*和R″*的含义如申请中所定义,通常情况下,对于R′*,它是一种烷基,其在α-酮功能的γ-位置上携带可提取氢,并携带从中派生出含有烯烃功能的芳香化合物的基团;对于R″*,它是一种初级或次级醇的有机部分,从R″*OH中派生出含有芳香醛或酮的化合物。