反应详情

2-Bromo4,6-difluoroaniline (10.4 g, Aldrich) was dissolved in dichloromethane (75ml) and treated with pyridine (4.63 g) in an ice bath. 4-Dimethylaminopyridine (0.61 g) was then added and the mixture was allowed to warm to room temperature. After dropwise addition of pivotally chloride (7.23 g, BDH), the reaction was stirred for 5 hours. On completion, the mixture was added to diethyl ether (250 ml), washed twice with 2M HCl (250m1) and the resulting organic layer was treated with saturated NaHCO3 (2×250 ml). The organic layer was washed with water (250 ml), and dried over MgSO4. Removal of the solvent from the filtrate gave the crude title product as a white solid (13.40 g).

1. washwashed twice with 2M HCl (250m1)
2. additionthe resulting organic layer was treated with saturated NaHCO3 (2×250 ml)
3. washThe organic layer was washed with water (250 ml)
4. dry with materialdried over MgSO4
5. customRemoval of the solvent from the filtrate