反应详情

温度

10 °C

Diisobutylaluminium hydride (19.4 g.) in dry benzene (50 ml.) was added dropwise at 10° C. to a stirred solution of 7-(2-tetrahydropyranyloxy)heptanenitrile (20.6 g.) in dry diethyl ether (200 ml.). The solution was stirred at 10° C. for 30 minutes and was then added to 2N aqueous sulphuric acid (300 ml.) at 0° C. The mixture was heated at 30° C. for 30 minutes, and then saturated with sodium chloride and the layers were separated. The aqueous layer was extracted with diethyl ether and the combined organic layers were washed with aqueous sodium bicarbonate, and then aqueous sodium chloride, and dried over sodium sulphate. The solvent was evaporated and the residue was distilled under reduced pressure to give 7-(2-tetrahydropyranyloxy)heptanal (12.7 g.), b.p. 78°-106° C./0.1 mm.Hg, nD25 1.456.

1. temperatureThe mixture was heated at 30° C. for 30 minutes
2. customsaturated with sodium chloride and the layers were separated
3. extractionThe aqueous layer was extracted with diethyl ether
4. washthe combined organic layers were washed with aqueous sodium bicarbonate
5. dry with materialaqueous sodium chloride, and dried over sodium sulphate
6. customThe solvent was evaporated
7. distillationthe residue was distilled under reduced pressure