反应详情

温度

0 °C

257 ml (0.9 mol) of a 3.5 molar solution of sodium-bis-(2-methoxy-ethoxy)dihydroaluminate is steadily added by drops under nitrogen to a solution of 120 g (0.3 mol) of the compound from Example VIII in 800 ml of dried tetrahydrofuran at room temperature, and the mixture is subsequently stirred for 5 h. After cooling to 0° C., 500 ml of water is carefully added by drops, the phases are separated, and the aqueous phase is extracted three times with 250 ml ethyl acetate each time. The combined organic phases are washed with saturated sodium chloride solution, dried over magnesium sulfate, and evaporated in a vacuum. The residue is mixed with petroleum ether, drawn off by suction, and dried in a desiccator.

1. customthe phases are separated
2. extractionthe aqueous phase is extracted three times with 250 ml ethyl acetate each time
3. washThe combined organic phases are washed with saturated sodium chloride solution
4. dry with materialdried over magnesium sulfate
5. customevaporated in a vacuum
6. additionThe residue is mixed with petroleum ether
7. customdried in a desiccator