反应详情

温度

20 °C

19.3 g (0.1 mole) of chloromethanesulfonic acid bromide are added in the course of 10 minutes to a solution of 14 g (0.2 mole) of 2,5-dihydrofuran and 0.5 ml of tert.-butyl hydroperoxide in 30 ml of chloroform at -40° C. After 15 minutes, 16.5 ml of triethylamine, dissolved in 20 ml of chloroform, are added dropwise at the same temperature, so as to dehydrobrominate the 3-chloromethylsulfonyl-4-bromotetrahydrofuran which has been formed. The mixture is stirred for half an hour at 20° C., washed with water, dried and concentrated. The residue is repeatedly digested with ether and the ether extract is distilled; it boils at 115°-120° C./0.2 mm Hg. 4.8 g of 3-chloromethylsulfonyl-2,5-dihydrofuran are obtained.

1. additionare added dropwise at the same temperature
2. customhas been formed
3. washwashed with water
4. customdried
5. concentrationconcentrated
6. extractionthe ether extract
7. distillationis distilled