反应详情

Water (2 ml) and concentrated sulfuric acid (2 ml) were added to a acetic acid suspension (2 ml) of 4-methyl-1H-indazole-5-carbonitrile (399 mg, 2.00 mmol) at room temperature, and then the reaction was carried out for 18 hours under reflux conditions. The reaction mixture was poured onto ice (20 g) and the precipitate was collected by filtration and dried to obtain 4-methyl-1H-indazole-5-carboxylic acid (247 mg, 70.1%).

1. additionThe reaction mixture was poured onto ice (20 g)
2. filtrationthe precipitate was collected by filtration
3. customdried