反应详情

4'-chloropropiophenone (39.6 g) and anhydrous aluminum chlorid (0.1 g) were dissolved in 100 ml of chloroform. To the resulting solution was protionwise added bromine (37.6 g) at a temperature of 30° to 35° C. The reaction mixture was stirred at room temperature for 30 minutes. Then nitrogen was blown into the reaction mixture to remove the formed hydrogen bromide therefrom. Thereafter, the solvent was distilled off under reduced pressure to give 2-bromo-4'-chloropropiophenone (58.1 g). mp 77.5°-79.5° C.

1. customat a temperature of 30° to 35° C
2. customto remove the formed hydrogen bromide
3. distillationThereafter, the solvent was distilled off under reduced pressure