Patent ID: 7534751

Claim:
A photo-activated pro-fragrance conjugate comprising: a) a photo-labile unit which upon exposure to electromagnetic radiation is capable of releasing a pro-fragrance unit; and b) a pro-fragrance unit comprising at least one nitrogen atom, and an optional linking moiety, said at least one nitrogen atom being bound directly to said photo-labile unit, or indirectly to said photo-labile unit by said linking moiety, via a chemical bond capable of being broken when said conjugate is exposed to electromagnetic radiation, wherein said pro-fragrance unit has the formula: wherein Z is oxygen or sulfur; and the index m is 1, 2 or 3, R 5 is a substituted or unsubstituted hydrocarbyl unit which comprises: a) a C 6 -C 22 substituted or unsubstituted, linear or branched alkyl or alkenyl; b) a C 6 -C 22 substituted or unsubstituted; cycloalkyl, branched cycloalkyl, cycloalkenyl, branched cycloalkenyl, aryl, heterocyclicalkyl, or heterocyclicalkenyl c) and mixtures thereof; R 6 comprises: a) hydrogen; b) a C 1 -C 10 substituted or unsubstituted linear alkyl; c) a C 3 -C 10 substituted or unsubstituted branched alkyl; d) a C 2 -C 10 substituted or unsubstituted linear alkenyl; e) a C 3 -C 10 substituted or unsubstituted branched alkenyl; f) a C 3 -C 15 substituted or unsubstituted cycloalkyl; g) a C 4 -C 15 substituted or unsubstituted branched cycloalkyl; h) a C 4 -C 15 substituted or unsubstituted cycloalkenyl; i) a C 5 -C 15 substituted or unsubstituted branched cycloalkenyl; j) a C 6 -C 15 substituted or unsubstituted aryl; k) a C 6 -C 22 substituted or unsubstituted heterocyclicalkyl; l) a C 6 -C 22 substituted or unsubstituted heterocyclicalkenyl; m) and mixtures thereof; said R 5 and R 6 units may optionally, when taken together, form a substituted or unsubstituted ring comprising a ring moiety, said ring moiety comprising from 3 to 10 carbon atoms; each R 7 is independently a substituted or unsubstituted hydrocarbyl unit; when taken together, any two geminal R 7 units form a carbonyl moiety, or when any two R 7 units covalently bind together, said R 7 units form a moiety selected from the group consisting of: i) a C 3 -C 6 spiroannulated ring; ii) a heterocyclic aromatic ring comprising from 5 to 7 atoms; iii) a non-heterocyclic aromatic ring comprising from 5 to 7 atoms; iv) a heterocyclic ring comprising from 5 to 7 atoms; v) a non-heterocyclic ring comprising from 5 to 7 atoms; vi) or mixtures thereof; and the index m is an integer from 1 to 3.