反应详情

温度

80 °C

N1-Cyclopropyl-5-[(2-amino-4-pyridyl)oxy]-1H-1-indolecarboxamide (830 mg), succinic anhydride (270 mg) and toluene (30ml) were refluxed together for 30 minutes. After adding 50 ml of acetic anhydride and 82 mg of sodium acetate to the reaction solution, the mixture was stirred at 80° C. for 15 minutes. The solvent was distilled off under reduced pressure, and the residue was purified by silica gel chromatography (ethyl acetate). The second eluted substance was N1-cyclopropyl-5-{[2-(2,5-dioxotetrahydro-1H-1-pyrrolyl)-4-pyridyl]oxy}-1H-1-indolecarboxamide, of which 440 mg was obtained as a colorless powder.

1. distillationThe solvent was distilled off under reduced pressure
2. customthe residue was purified by silica gel chromatography (ethyl acetate)
3. customof which 440 mg was obtained as a colorless powder