反应详情

To a stirred solution of 1-(2,3-dihydro-benzofuran-5-yl)-ethanone (2.5 g, 15.4 mmol) (Lancaster) in dioxane (2 mL) was added dropwise a solution of bromine (2.96 g, 18.5 mmol) in dioxane (60 mL). After stirring 15 minute the mixture was concentrated in vacuo and the residue was purified by chromatography on silica gel (2:1 hexane-dichloromethane) to provide 1.41 g (38%) of 2-bromo-1-(2,3-dihydro-benzofuran-5-yl)-ethanone.

1. concentrationwas concentrated in vacuo
2. customthe residue was purified by chromatography on silica gel (2:1 hexane-dichloromethane)