| abstract |
Alkyl-2-enoic acid esters of formula n nwherein R 1 is C 4 , C 5 , or C 6 linear or branched alkyl, e.g. n-butyl, sec-butyl, tert-butyl, n-pentyl, 3-methyl-butyl, 2-methyl-butyl, 1-methyl-butyl. 1-ethyl-propyl, 1,2-dimethyl-propyl, 2-ethylbutyl; and R 2 and R 3 are independently hydrogen, methyl or ethyl, with the proviso that a maximum of one of R 2 and R 3 is hydrogen;n nwith the proviso that if R 2 is hydrogen and R 3 is methyl, R 1 is not butyl or 1,3-dimethylbutyl, their manufacture and their use in flavor and fragrance compositions. |