反应详情

An acidic resin (Dowex 50W×8, trade name, Dow Chemical Company, 800 mg) and dihydropyran (1.89 ml, 20.7 mol) were added dropwise to a solution of 1,4-cyclohexanediol (4.0 g, 34.4 mol) in toluene (80 ml) at room temperature and vigorously stirred. After 17 hours, the reaction mixture was filtered by the use of Celite and the filtrate was concentrated under reduced pressure. The resulting residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate) to obtain 4-(tetrahydro-2H-pyran-2-yloxy)cyclo-hexanol (2.69 g, 65%).

1. filtrationthe reaction mixture was filtered by the use of Celite
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe resulting residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate)