| 摘要 |
A fragrance precursor represented by the formula 1 wherein X and Y together represent a double bond to a carbon atom bearing R1 and R2, with R1 = H, methyl, acetyl or C1 -C3 alkoxycarbonyl (e.g. ethoxycarbonyl); and R2 = phenyl optionally substituted with up to 3 (i.e. 0, 1, 2 or 3) groups selected from C1 -C4 alkyl (e.g. methyl, ethyl, iso-propyl, tert-butyl), vinyl, hydroxy, C1 -C3 alkoxy (e.g. ethoxy), and -O-CH2-O-, e.g. R2 is benzo[d][1,3] dioxol-5-yl, 4-methylphenyl, 4-methoxyphenyl, 4-vinylphenyl or 3-ethoxy-4-hydroxyphenyl or R2 = naphthyl, (naphthyl)methyl, 1,1,2,4,4,8-hexamethy-1,2,3,4- tetrahydronaphthalen-7-yl, or 1,1,2,4,4,-pentamethyl-1,2,3,4- tetrahydronaphthalen-7-yl or R2 = COR3, wherein R3 is H, C1 -C10 alkoxy (e.g. ethoxy, 1-(3,3-dimethylcyclohexyl)ethoxy), C1 -C4 alkyl (e.g. methyl, ethyl, propyl, iso-propyl, tertbutyl), e.g. R2 is formyl, acetyl, ethoxycarbonyl, 1-(3,3-dimethylcyclohexyl)ethoxycarbonyl; or wherein X is OR4, with R4 being H or alkyl, and Y is OR5, with R5 being alkyl, useful as a perfume ingredient. |
