反应详情

To a stirred solution of 4-[3-(benzyloxy)-5-fluorophenyl]-4-formyl-3,4,5,6-tetrahydro-2H-pyran (1.08 g, 3.4 mmol) in THF (16 ml) at room temperature under a nitrogen atmosphere was added on 0.96 M solution of methyl magnesium bromide (5.3 ml, 5.1 mmol) in a dropwise manner. The mixture was stirred overnight, diluted with saturated aqueous ammonium chloride (40 ml) and extracted with dichloromethane (2×40 ml). The combined organic layers were washed with water (40 ml) and brine (40 ml), dried (magnesium sulfate) and concentrated to dryness. Purification by column chromatography (silica-gel, 150 g, ethyl acetate in n-hexane as an eluent increasing the amount of ethyl acetate from 40% to 60%) afforded the titled compound as a colorless liquid (0.71 g, 63%).

1. extractionextracted with dichloromethane (2×40 ml)
2. washThe combined organic layers were washed with water (40 ml) and brine (40 ml)
3. dry with materialdried (magnesium sulfate)
4. concentrationconcentrated to dryness
5. customPurification by column chromatography (silica-gel, 150 g, ethyl acetate in n-hexane as an eluent
6. temperatureincreasing the amount of ethyl acetate from 40% to 60%)