MICHAEL ADDITION PRODUCT AND SCHIFF'S BASE AROMACHEMICALS.

摘要

A pro-odorant or pro-flavorant having the formula (I): wherein R¹ is H, an aliphatic group or an aromatic group, R² is an aliphatic group or an aromatic group, provided that the total number of carbon atoms in the groups R¹ and R² is 10 or more; R³, R⁴ and R⁶ are each independently hydrogen or organic moieties which together with C(O)R⁵ render a compound of formula R⁵C(O)R⁶C=CR³R⁴ a material having odorant or flavourant characteristics and R⁵ is hydrogen or an organic moiety; or having the formula (II): R⁸R⁹C=NR¹⁰ wherein R¹⁰ is an aliphatic group or an aromatic group having at least 10 carbon atoms; R⁸ and R⁹ are each independently hydrogen or organic moieties which together with C=O render a compound of formula R⁸R⁹C=O a material having odorant or flavourant characteristics, provided that only one of R⁸ and R⁹ is hydrogen; or having the formula (III): wherein R¹ is H, an aliphatic group or an aromatic group, R² is an aliphatic group or an aromatic group, provided that the total number of carbon atoms in the groups R¹ and R² is 10 or more; Z is CH₂ or O, n is 0 or 1, such that the ring is a 5 or 6 membered ring, R¹¹ is alkyl or alkenyl having up to 10 carbon atoms so as to render a compound of formula (IV): a material having odorant or flavorant characteristics is described. Methods for producing these compounds and their use as flavours and fragrances is also described.