反应详情

15 g (59.1 mmol) of tert-butyl 3-methyl-2-(4-methylphenyl)pentanoate, 11 g (62 mmol) of N-bromosuccinimide and 97 mg (0.59 mmol) of 2,2′-azobis-2-methylpropionitrile in 150 ml of dichloromethane were stirred under reflux for 2 h. After the reaction had gone to completion, the solvent was removed under reduced pressure. The crude product was purified chromatographically on silica gel (mobile phase cyclohexane/ethyl acetate 20:1). This gave 16.22 g (47.5 mmol, 80% of theory) of a colorless oil.

1. temperatureunder reflux for 2 h
2. customthe solvent was removed under reduced pressure
3. customThe crude product was purified chromatographically on silica gel (mobile phase cyclohexane/ethyl acetate 20:1)