反应详情

To a solution of 3-chloro-4-methoxybenzyl alcohol (164 g) in dichloromethane (800 ml) was added phosphorus tribromide (45.1 ml) under ice-cooing and the mixture was stirred at ambient temperature for an hour followed by adding water to the mixture. The separated aqueous layer was extracted with dichloromethane. The combined organic layers were washed with an aqueous saturated sodium bicarbonate solution and brine, dried over magnesium sulfate, and evaporated in vacuo. The oily residue was triturated with n-hexane to obtain 3-chloro-4-methoxybenzyl bromide (200 g) as a white powder.

1. extractionThe separated aqueous layer was extracted with dichloromethane
2. washThe combined organic layers were washed with an aqueous saturated sodium bicarbonate solution and brine
3. dry with materialdried over magnesium sulfate
4. customevaporated in vacuo
5. customThe oily residue was triturated with n-hexane