反应详情

A solution of 4-chloro-5-methylsulfonylanthranilic acid (250 mg.) and benzyl bromide (180 mg.) in 5% aqueous sodium hydroxide is heated on a water bath at 50° C. for four hours during which time 5% aqueous sodium hydroxide is added a few drops at a time to maintain a basic reaction medium. The reaction mixture is poured into water and acidified with hydrochloric acid to give 2-benzylamino-4-chloro-5-methylsulfonylbenzoic acid, m.p. 179° C. after recrystallization from ethanol and water.

1. additionis added a few drops at a time
2. temperatureto maintain a basic reaction medium