反应详情

3-Benzylamino-5-chlorosulfonyl-4-phenylbenzoic acid (1.0 g) is in portions added to conc. ammonium hydroxide (10 ml) while stirring at 10°-12° C. After additional stirring at room temperature for about 18 hours, the resulting solution is dropwise added to an excess of icecold 4 N hydrochloric acid. The resulting precipitate is collected by filtration, washed with water and dried. After recrystallization from aqueous ethanol, 3-benzylamino-4-phenyl-5-sulfamylbenzoic acid is obtained with a melting point of 221°-222° C.

1. stirringAfter additional stirring at room temperature for about 18 hours
2. filtrationThe resulting precipitate is collected by filtration
3. washwashed with water
4. customdried
5. customAfter recrystallization from aqueous ethanol