Process for preparation of 2-methoxy-3,6-dichloro-benzoic acid
申请人:Celamerck GmbH & Co. KG
公开号:US03969404A1
公开(公告)日:1976-07-13
An improved method of preparing 2-methoxy-3,6-dichloro-benzoic acid which comprises the step of oxidizing 2-methoxy-3,6-dichloro-benzyl alcohol into the correspondingly substituted benzoic acid, where the improvement resides in that the said benzyl alcohol is prepared by catalytically de-brominating 2-hydroxy-5-bromo-3,6-dichloro-benzyl alcohol, followed by methylation of the 2-hydroxy substituent of the de-brominated benzyl alcohol.