反应详情

To a solution of 3-(4-methoxybenzyl)-1-bromobenzene (155 mg, 0.559 mmol) in THF (0.80 mL), an n-butyllithium 2.44 M hexane solution (0.23 mL, 0.559 mmol) was added dropwise at −78° C. and the mixture solution was stirred for 25 minutes. Then, a solution of 2,3,4-tribenzyloxy-5-(benzyloxy-methyl)cyclohexanone (200 mg, 0.373 mmol) in THF (0.70 mL) was added dropwise thereto and the reaction mixture was stirred for 75 minutes. To the reaction mixture was added a saturated ammonium chloride aqueous solution and the mixture was extracted with ethyl acetate, and the organic layer was washed with a saturated sodium chloride aqueous solution, and then dried over anhydrous magnesium sulfate. The solvent was concentrated and the obtained residue was purified by silica gel chromatography [developing solution=ethyl acetate:n-hexane (2:5)] to obtain the title compound (80 mg, 27%) as a mixture of 1R-isomer and 1S-isomer.

1. stirringthe reaction mixture was stirred for 75 minutes
2. extractionthe mixture was extracted with ethyl acetate
3. washthe organic layer was washed with a saturated sodium chloride aqueous solution
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationThe solvent was concentrated
6. customthe obtained residue was purified by silica gel chromatography [developing solution=ethyl acetate:n-hexane (2:5)]