Cycloalkylidenemethylphenylacetic acid derivatives of formula (I):
(wherein R1 represents hydrogen or alkyl and n is an integer from 1 to 3) are prepared by reacting a benzaldehyde acid compound of formula (II):
with an enamine derivative of formula (III):
(wherein R2 and R3 are various organic groups) and ther hydrolizing the product. The use of the acid of formula rather than its corresponding ester enables the reaction to be effected with a good yield and under moderate and economical reaction conditions.
                            式(I):的环烷亚甲基
苯乙酸衍
生物(其中 R1 代表氢或烷基,n 为 1 至 3 的整数)是通过式(II):的
苯甲醛酸化合物与式(III):的烯胺衍
生物(其中 R2 和 R3 为各种有机基团)反应,并对产物进行
水解而制备的。 使用式中的酸而不是其相应的酯,可使反应在温和、经济的反应条件下进行,且收率高。