反应详情

Methyl 4-nitro-1-phenyl-1H-pyrazole-3-carboxylate (1.14 g, 4.63 mmol) was suspended in 1N sodium hydroxide (11 mL), and the solution was stirred at room temperature for 2 hours under a nitrogen atmosphere. The precipitates formed upon addition of IN hydrochloric acid (12 mL) were collected by filtration, washed with water and dried to obtain the title compound (1.00 g, 93.2%).

1. filtrationwere collected by filtration
2. washwashed with water
3. customdried