申请人:Warner-Lambert Company
公开号:US04885386A1
公开(公告)日:1989-12-05
An improved process for the preparation of 3-chloro-2,4,5-trifluorobenzoic acid is described which involves reaction of a diester of 3,4,5,6-tetrafluoro-1,2-benzenedicarboxylic acid with a substituted amine to afford 3-amino-2,4,5-trifluorobenzoic acid followed by subsequent conversion of the amio intermediate into 3-chloro-2,4,5-trifluorobenzoic acid.
描述了一种改进的制备3-氯-2,4,5-三氟苯甲酸的过程,涉及将3,4,5,6-四氟-1,2-苯二甲酸二酯与取代胺反应,得到3-氨基-2,4,5-三氟苯甲酸,随后将氨基中间体转化为3-氯-2,4,5-三氟苯甲酸。