反应详情

温度

0 °C

69.0 g (380 mmol) of B5 were dissolved in 500 ml of dry dimethylformamide, cooled to 0° C. and 11.5 g (480 mmol) sodium hydride were added and the mixture was allowed to stirr for 10 minutes. A solution of 31.2 ml (418 mmol) (chloromethyl)methylether in 100 ml of dry diemthylformamide was added at this temperature over a period of 30 minutes. After stirring at room temperature overnight, the solvent was distilled off and the residue was partitionated between 400 ml of dichloromethane and 100 ml of water. The organic layer was washed with 50 ml of aqueous sodium hydrogen carbonate and two times with water (80 ml each) and finally dried over sodium sulfate. Removing the solvent in vacuo yielded 73.5 g (87%) B6 as a colorless oil which was used without further purification.

1. distillationthe solvent was distilled off
2. washThe organic layer was washed with 50 ml of aqueous sodium hydrogen carbonate and two times with water (80 ml each)
3. dry with materialfinally dried over sodium sulfate
4. customRemoving the solvent in vacuo