反应详情

A solution of n-butyl lithium (1.8 ml) was added dropwise to a solution of 560 mg of 1,1-(ethylenedioxy)-4-methyl-3-(phenylsulfonyl)-cyclohexane and 4 mg of triphenylmethane in 5 ml of THF under argon stream at −78° C. The resulting mixture was stirred for 10 minutes and then reacted at room temperature for 1 hour. HMPA (1 ml) was added and the resulting mixture was recooled to −78° C., followed by the dropwise addition of a solution of 166 mg of 10-bromo-1-decanol in 2 ml of THF. After stirring the reaction at −20° C. for 2 hours, the reaction mixture was poured into a saturated solution of ammonium chloride. The resulting mixture was extracted with ethyl ether. The organic layer was washed with water and saturated saline and then, dried over magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by chromatography on a silica gel column while using hexane-ethyl acetate, whereby 1,1-(ethylenedioxy)-3-(10-hydroxydecyl)-4-methyl-3-(phenylsulfonyl)-cyclohexane was obtained in the form of a colorless oil. Yield: 97%, TLC: (hexane-AcOEt: 6-4) Rf=0.14

1. customreacted at room temperature for 1 hour
2. customwas recooled to −78° C.
3. stirringAfter stirring
4. customthe reaction at −20° C. for 2 hours
5. extractionThe resulting mixture was extracted with ethyl ether
6. washThe organic layer was washed with water and saturated saline
7. dry with materialdried over magnesium sulfate
8. distillationThe solvent was distilled off under reduced pressure
9. customThe residue was purified by chromatography on a silica gel column