反应详情

温度

70 °C

To a mixture of 3-amino-2-fluorobenzonitrile (2.24 g, 16.46 mmol) and 4-(dimethylamino)benzoyl chloride (3.46 g, 18.84 mmol) in 1,2-dichloroethane (50 mL) at rt was added pyridine (0.891 mL, 11.02 mmol). The resulting mixture was heated at 70° C. for 5 hr. On cooling to room temperature, the mixture was diluted with ethyl acetate (250 mL), washed with water (5×60 mL) and brine (60 mL), and dried over anhydrous MgSO4. The organic solution was concentrated under vacuum, and the residue was subjected to ISCO (2×330 g silica gel, 25-50% ethyl acetate/hexane) to afford the desired product (4.11 g, 14.51 mmol, 88% yield) as a white solid.

1. temperatureOn cooling to room temperature
2. washwashed with water (5×60 mL) and brine (60 mL)
3. dry with materialdried over anhydrous MgSO4
4. concentrationThe organic solution was concentrated under vacuum