反应详情

A solution of bromine (35 ml) in chloroform (150 ml) was added dropwise over 3 hours to a stirred mixture of 1-[1-(4-chlorophenyl)cyclobutyl]ethanone (150 g), chloroform (50 ml) and methanol (235 ml). When the addition was complete, the mixture was stirred at ambient temperature for a further 3 hours, then it was diluted with ice-cold water (750 ml). The product was extracted into dichloromethane (3×200 ml), and the combined extracts were washed with saturated aqueous sodium hydrogen carbonate solution (3×100 ml) and water (100 ml), dried (MgSO4), and the solvents removed in vacuo, to leave 2-bromo-1-[1-(4-chlorophenyl)cyclobutyl]ethanone as an oil which was used without further purification.

1. additionWhen the addition
2. extractionThe product was extracted into dichloromethane (3×200 ml)
3. washthe combined extracts were washed with saturated aqueous sodium hydrogen carbonate solution (3×100 ml) and water (100 ml)
4. dry with materialdried (MgSO4)
5. customthe solvents removed in vacuo