反应详情

To a solution of 1,4-cyclohexandiol (cis: trans=ca. 1:1, 25.0 g) and t-butylchlorodimethylsilane (32.4 g) in dimethylformamide (150 ml) was added slowly and dropwise a solution of triethylamine 21.8 g) and 4-(dimethylamino)pyridine (1.05 g) in dimethylformamide (50 ml) at 0° C. After stirring for one hour, to the reaction mixture were added water and ether. The ether layer was separated, washed with water and saturated aqueous sodium chloride and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the resulting residue was purified by column chromatography (support; silica gel, 300 g, developing agent; ethyl acetate : hexane=1:5) to obtain the object compound (17.8 g) as a mixture of cis and trans isomers (ca. 1:1).

1. customat 0° C
2. customThe ether layer was separated
3. washwashed with water and saturated aqueous sodium chloride
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was evaporated under reduced pressure
6. customthe resulting residue was purified by column chromatography (support; silica gel, 300 g, developing agent; ethyl acetate : hexane=1:5)