反应详情

温度

50 °C

2-Amino 5-cyano pyrazine (0.25 g, 2.08 mmol) was dissolved in THF and DCM (3:1, 40 mL) and pyridine (0.49 g, 6.2 mmol) was added. The mixture was stirred for 15 minutes. Phenylchloroformate (0.97 g, 6.2 mmol) was added and the reaction mixture was heated at 50° C. for 2 hours. The reaction mixture was cooled to RT and DCM (40 mL) and water (25 mL) were added. The separated organic layer was washed with water (2×25 mL), brine (25 mL), dried (Na2SO4) and the solvents evaporated under reduced pressure. The product was purified by column chromatography on neutral silica gel using 15-20% EtOAc in hexane to give the title compound (0.29 g, 54%).

1. temperatureThe reaction mixture was cooled to RT
2. washThe separated organic layer was washed with water (2×25 mL), brine (25 mL)
3. dry with materialdried (Na2SO4)
4. customthe solvents evaporated under reduced pressure
5. customThe product was purified by column chromatography on neutral silica gel using 15-20% EtOAc in hexane