Acetic Anhydride → HCID 16640801, compound
Reaction equation
[CH:1]1[CH:6]=[C:5]([S:7]([OH:10])(=[O:9])=[O:8])[CH:4]=[C:3]([NH2:11])[CH:2]=1.[C:12]([O-])(=[O:14])[CH3:13].[Na+:16].C(OC(=O)C)(=O)C>>[Na+:16].[C:12]([NH:11][C:3]1[CH:4]=[C:5]([S:7]([O-:10])(=[O:8])=[O:9])[CH:6]=[CH:1][CH:2]=1)(=[O:14])[CH3:13]Participants
4
Procedure
Metanilic acid (3-aminobenzenesulfonic acid) in an amount of 37.5 parts, and 18.7 parts of sodium acetate are charged into the kneader and the procedure described and 32 parts of acetic anhydride are added to the reaction mixture. The powdery reaction mass is mixed for one hour and then dried at 85° C. in a stream of air to give a 95% yield of 3-acetylaminobenzenesulfonic acid sodium salt. Liquid chromatography and titration analysis indicated a purity of greater than 97% and the presence of about 0.5% metanilic acid.