反应详情

3.0 g (10.93 mmol) of tert-butyl(2S)-cyclopentyl-(4-methylphenyl)acetate were heated to reflux in 20 ml of chloroform, and 90 mg (0.55 mmol) of 2,2′-azobis(2-methylpropanenitrile) and 2.72 g (15.31 mmol) of N-bromosuccinimide were then added in 5 portions every 30 min. The mixture was stirred under reflux for 6 h and then cooled to RT and concentrated on a rotary evaporator. The residue was purified by chromatography on 120 ml of silica gel (mobile phase cyclohexane/ethyl acetate 4:1). This gave 2.8 g (72% of theory) of the title compound.

1. temperatureunder reflux for 6 h
2. concentrationconcentrated on a rotary evaporator
3. customThe residue was purified by chromatography on 120 ml of silica gel (mobile phase cyclohexane/ethyl acetate 4:1)