Process for preparation of o-(2,6-dichloroanilino)phenylacetic acid and
申请人:Ikeda Mohando Co., Ltd.
公开号:US04283532A1
公开(公告)日:1981-08-11
Disclosed is a process for the preparation of o-(2,6-dichloroanilino)phenylacetic acid (Diclofenac) or its pharmacologically acceptable acid addition salt, which comprises hydrolyzing an N,N-disubstituted-o-(2,6-dichloroanilino)phenylacetamide derivative with an alkali. Also a novel intermediate for use in the preparation of Diclofenac, that is, an N,N-disubstituted-o-halogenophenylacetamide in which the halogen is iodine or bromine, is disclosed.