反应详情

Argon gas was blown into a suspension of indoxyl acetate (1.75 g, 10 mmol) and isatin (1.47 g, 10 mmol) in anhydrous methanol (20 mL) for 5 minutes. Sodium carbonate (2.12 g, 20 mmol) was added to the reaction liquid and stirred at room temperature for 18 hours. The reaction liquid was then poured into water (1 L). The precipitated crude crystals were collected by suction filtration. The resulting crude crystals were recrystallized from 1,4-dioxane/hexane to give purple needle-shaped crystals of indirubin (1.81 g, 69%).

1. customThe reaction liquid
2. customThe precipitated crude crystals
3. filtrationwere collected by suction filtration
4. customThe resulting crude crystals were recrystallized from 1,4-dioxane/hexane