反应详情

The method of Cervena et al.3 was followed. To a stirred solution of 3,4-difluoroaniline (10 mmol) in toluene (5 mL) and pyridine (10 mmol) maintained at 5-10 deg C was added chloroacetyl chloride (10 mmol) in toluene (5 mL) dropwise. The mixture was allowed to stand overnight at room temperature. The organic layer was then separated and the residue was mixed with water (60 mL). The separated solid product was recrystallized from toluene to give N-(3,4-difluorophenyl) chloroacetamide (8.6 g, 84.3% yield). 1HNMR (300 MHz, CDCl3) δ 8.24 (s, 1H, NH), 7.63 (td, J=8.1 Hz, 1H, Ar—H), 7.16-7.12 (m, 2H, Ar—H), 4.19 (s, 2H, COCH2Cl).

1. customThe organic layer was then separated
2. additionthe residue was mixed with water (60 mL)
3. customThe separated solid product was recrystallized from toluene