反应详情

温度

0 °C

To a solution of 5-[4-[1-(4-methylphenylsulfonyl)piperidin-4-yl]phenyl]pentanoic acid (0.50 g) in THF (10 ml) were added at room temperature oxalyl chloride (0.21 ml) and a drop of DMF, and the mixture was stirred for 1 hour. Under reduced pressure, the mixture was concentrated, and the residue was dissolved in dichloromethane (10 ml). To the mixture was added at 0° C. aluminum chloride (0.35 g), and the mixture was stirred at 0° C. for 30 minutes and then at room temperature for 5 minutes. The mixture was added to ice/water, and the mixture was extracted with ethyl acetate. The organic layer was washed with 1N hydrochloric acid, saturated sodium bicarbonate solution and saturated brine, and dried with magnesium sulfate. Under reduced pressure, the mixture was concentrated, and the residue was purified with column chromatography (ethyl acetate/hexane=1:2) to give colorless crystals of 3-[1-(4-methylphenylsulfonyl)piperidin-4-yl]-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-one (0.32 g).

1. concentrationUnder reduced pressure, the mixture was concentrated
2. dissolutionthe residue was dissolved in dichloromethane (10 ml)
3. additionTo the mixture was added at 0° C. aluminum chloride (0.35 g)
4. waitat room temperature for 5 minutes
5. additionThe mixture was added to ice/water
6. extractionthe mixture was extracted with ethyl acetate
7. washThe organic layer was washed with 1N hydrochloric acid, saturated sodium bicarbonate solution and saturated brine
8. dry with materialdried with magnesium sulfate
9. concentrationUnder reduced pressure, the mixture was concentrated
10. customthe residue was purified with column chromatography (ethyl acetate/hexane=1:2)