申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0006284A1
公开(公告)日:1980-01-09
A process for racemizing an optically active phenylacetic acid of the formula (I):
wherein X an Y, which may be the same or different, each represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a halogen-substituted lower alkyl group or a halogen-substituted lower alkoxy group, or X and Y may jointly form an alkylenedioxy group; m and n, which may be the same or different, each represents an integer of 1 to 5, and the sum of m and n does not exceed 5; and R represents an isopropyl group or a cyclopropyl group, comprises heating the acid to a temperature of at least 150° C in the presence or absence of an inert solvent.
一种使式(I)的具有光学活性的苯乙酸消旋化的工艺:其中 X 和 Y 可以相同或不同,各自代表氢原子、卤素原子、低级烷基、低级烷氧基、卤素取代的低级烷基或卤素取代的低级烷氧基,或 X 和 Y 可共同形成烷基二氧基;m 和 n 可以相同或不同,各自代表 1 至 5 的整数,且 m 和 n 之和不超过 5;R 代表异丙基或环丙基。