Water → HCID 178508184, compound

Participants

Reaction Steps

To a solution of 1.53 g (10 mmol) of 3-nitro-benzene-1,2-diamine in ethanol (20 mL) was added 1.3 g (12.5 mmol) of BrCN and water (5 mL). The mixture was refluxed for 1.0 h. After cooling to room temperature, the solvent was concentrated, then the residue was dissolved in water, the pH was adjusted to 8.0 with sat. NaHCO3 solution. The resulting solid was filtered, washed with water and dried under vacuum to afford 1.42 g (80%) of the 7-nitro-1H-benzoimidazol-2-ylamine LCMS: 179 (M+1)+.

Provenance & Evidence