反应详情

To a solution of 4,6-difluoroindoline (4.6 g, 29.8 mmol) in acetonitrile (50 mL) was added a solution of N-bromosuccinimide (3.68 g, 20.6 mmol) acetonitrile (30 mL) at 0° C. dropwise. The reaction was stirred for 30 minutes and quenched with saturated aqueous sodium bicarbonate solution and diluted with ethyl acetate. The layers were separated and the organic phases were dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash chromatography (0-60% ethyl acetate in petroleum ether) to give the title compound (4.0 g, 58% yield) as colorless oil

1. customquenched with saturated aqueous sodium bicarbonate solution
2. additiondiluted with ethyl acetate
3. customThe layers were separated
4. dry with materialthe organic phases were dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by flash chromatography (0-60% ethyl acetate in petroleum ether)