反应详情

A mixture of 2-bromo-4-methylbenzonitrile (13.3 g, 81.4 mmol), NBS (14.4 g, 84.4 mmol) and BPO (0.20 g) in CCl4 (150 mL) was heated for 4 h at reflux. The reaction mixture was cooled to room temperature and filtered. Then the solid was washed with CCl4 (20 mL×2) and the combined filtrate was washed successively with saturated sodium bicarbonate (50 mL), water (2×100 mL) and sodium thiosulfate (50 mL). The organic phase was dried over Na2SO4 and concentrated in vacuum afforded the titled compound, 2-bromo-4-(bromomethyl)benzonitrile (18.7 g, 100%).

1. temperaturewas heated for 4 h
2. temperatureat reflux
3. filtrationfiltered
4. washThen the solid was washed with CCl4 (20 mL×2)
5. washthe combined filtrate was washed successively with saturated sodium bicarbonate (50 mL), water (2×100 mL) and sodium thiosulfate (50 mL)
6. dry with materialThe organic phase was dried over Na2SO4
7. concentrationconcentrated in vacuum