摘要 |
A pro-odorant or pro-flavorant having the formula (I): wherein R<SUP>1</SUP> is H, an aliphatic group or an aromatic group, R<SUP>2</SUP> is an aliphatic group or an aromatic group, provided that the total number of carbon atoms in the groups R<SUP>1</SUP> and R<SUP>2</SUP> is 10 or more; R<SUP>3</SUP>, R<SUP>4 </SUP>and R<SUP>6</SUP> are each independently hydrogen or organic moieties which together with C(O)R<SUP>5</SUP> render a compound of formula R<SUP>5</SUP>C(O)R<SUP>6</SUP>C=CR<SUP>3</SUP>R<SUP>4</SUP> a material having odorant or flavourant characteristics and R<SUP>5</SUP> is hydrogen or an organic moiety; or having the formula (II): R<SUP>8</SUP>R<SUP>9</SUP>C=NR<SUP>10</SUP> wherein R<SUP>10</SUP> is an aliphatic group or an aromatic group having at least 10 carbon atoms; R<SUP>8</SUP> and R<SUP>9</SUP> are each independently hydrogen or organic moieties which together with C=O render a compound of formula R<SUP>8</SUP>R<SUP>9</SUP>C=O a material having odorant or flavourant characteristics, provided that only one of R<SUP>8</SUP> and R<SUP>9</SUP> is hydrogen; or having the formula (III): wherein R<SUP>1</SUP> is H, an aliphatic group or an aromatic group, R<SUP>2</SUP> is an aliphatic group or an aromatic group, provided that the total number of carbon atoms in the groups R<SUP>1</SUP> and R<SUP>2</SUP> is 10 or more; Z is CH<SUB>2</SUB> or O, n is 0 or 1, such that the ring is a 5 or 6 membered ring, R<SUP>11</SUP> 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. |