反应详情

温度

80 °C

To a solution of 2-amino-5-methylpyridine-3-carbonitrile (353 mg) in ethanol (10 mL) was added concentrated sulfuric acid (5 ml), and the mixture was stirred at 80° C. for 4 hr. The reaction mixture was added dropwise to a mixture of sodium carbonate (10.6 g), water (50 mL) and ethyl acetate (50 mL) under ice-cooling with stirring. The organic layer was separated, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (373 mg) as a colorless solid.

1. temperaturecooling
2. stirringwith stirring
3. customThe organic layer was separated
4. washwashed with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)