反应详情

温度

-5 °C

260 g (about 1.05 mol) of crude (3-bromo-4-chlorophenyl)methanol were dissolved in 2.86 liters of dichloromethane, the solution was cooled to −5° C. and 127.1 g (44.6 ml, 460 mmol) of phosphorus tribromide were added slowly. After the end of the addition, the mixture was stirred at −5° C. for another 1 h and then diluted with diluted with dichloromethane and water. The organic phase was removed, dried over magnesium sulphate and concentrated under reduced pressure. This gave, as a crude product, 280.5 g (about 84% of theory) of 2-bromo-4-(bromomethyl)-1-chlorobenzene.

1. additionAfter the end of the addition
2. additiondiluted
3. customThe organic phase was removed
4. dry with materialdried over magnesium sulphate
5. concentrationconcentrated under reduced pressure