反应详情

温度

120 °C

A mixture of 7-Methyl-6-nitro-1H-benzimidazole-4-carboxylic Acid (23) (16.99 g, 76.90 mmol), POCl3 (15.76 mL, 169 mmol), and sulfamide (14.767 g, 154 mmol) in sulfolane (77 mL) is heated to about 120° C. for about 3 hours. The reaction mixture is cooled to ambient temperature and added to ice water (1 L). The resultant mixture is cooled to about 0° C. filtered to provide 7-Methyl-6-nitro-1H-benzimidazole-4-carbonitrile (24), as an off white solid (12.54 g, 80% Yield).

1. temperatureThe reaction mixture is cooled to ambient temperature
2. filtrationfiltered