[C:1]([C:4]1[CH:5]=[CH:6][C:7](F)=[C:8]([S:10]([NH2:13])(=[O:12])=[O:11])[CH:9]=1)(=[O:3])[CH3:2].[NH3:15]>C(O)C>[C:1]([C:4]1[CH:5]=[CH:6][C:7]([NH2:15])=[C:8]([S:10]([NH2:13])(=[O:12])=[O:11])[CH:9]=1)(=[O:3])[CH3:2]A solution of 5-acetyl-2-fluorobenzenesulphonamide (0.5 g) in ethanol (40 ml) saturated with ammonia was heated at 100° in a bomb overnight. Concentration of the resultant solution yielded a yellow crystalline solid, 0.4 g, m.p. 263°-264° (from ethanol).
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