Pyridine → HCID 178430970, compound

Reaction equation

[CH3:1][C:2]1[C:7]2[NH:8][CH:9]=[N:10][C:6]=2[C:5]([C:11](O)=[O:12])=[CH:4][C:3]=1[N+:14]([O-:16])=[O:15].S(N)([NH2:20])(=O)=O.N1C=CC=CC=1>O>[CH3:1][C:2]1[C:7]2[NH:8][CH:9]=[N:10][C:6]=2[C:5]([C:11]([NH2:20])=[O:12])=[CH:4][C:3]=1[N+:14]([O-:16])=[O:15]

Participants

Procedure

A mixture of 7-Methyl-6-nitro-1H-benzimidazole-4-carboxylic Acid (23) (0.692 g, 3.12 mmol), sulfamide (0.600 g, 6.26 mmol), and pyridine (8 mL) is heated at reflux for about 16 hours. The resulting heterogeneous reaction mixture is cooled to ambient temperature, diluted with water (10 mL) and cooled to 0° C. for 1 hour. The solids that form are filtered, washed with water (10 mL) and methanol (10 mL), and dried to obtain 7-Methyl-6-nitro-1H-benzimidazole-4-carboxamide (25) as a cream colored solid (0.586 g, 85% yield).