反应详情

温度

30 °C

1-[(5R)-4,5-dihydro-5-phenyl-3-isoxazoyl]ethanone (3.2 g, 16.7 mmol) was dissolved in 1,2-dichloroethane (15 mL), and a solution of bromine (2.13 g, 13.3 mmol) in dichloroethane (5 mL) was added over 30 minutes while maintaining the temperature of the reaction mixture at about 30° C. The reaction mixture was diluted with water (10 mL), and the organic layer was concentrated under reduced pressure and purified by medium-pressure liquid chromatography using 35% of dichloromethane in hexanes as eluant to give 2.6 g of the title compound as a white solid, melting at 31-33° C.

1. concentrationthe organic layer was concentrated under reduced pressure
2. custompurified by medium-pressure liquid chromatography