| 摘要 |
The present invention provides cycloaliphatic unsaturated ketones, selected froma) damasc(en)one homologues having the general formula 10 wherein R stands for a hydrogen atom or a methyl radical and wherein the dotted lines represent one double bond in the positions 1, 2 endocyclic or 2 exocyclic, or two conjugated double bonds in the positions 1 and 3, 2 endocyclic and 4, or 2 exocyclic and 3;b) dihydrodamasc(en)ones having the general formulae 11 and 12 11 12 the dotted lines in the latter formula representing one double bond in the positions 1, 2 endocyclic or 2 exocyclic, or two conjugated double bonds in the positions 1 and 3, 2 endocyclic and 4 or 2 exocyclic and 3, andc) dehydroamascenones having the general formula 13 13 wherein the dotted lines represent two conjugated double bonds in the positions 1 and 3, 2 endocyclic and 4 or 2 exocyclic and 3 which are useful as flavouring and perfuming agents. |
