反应详情

To a solution of 2-[4-(cyclopropylsulfonyl)phenyl]-N-methoxy-N-methyl-3-(tetrahydro-2H-pyran-4-yl)propanamide (1.00 g) in tetrahydrofuran (10 mL) was added 1-propenylmagnesium bromide (0.5M tetrahydrofuran solution, 17.2 mL) under ice-cooling, and the mixture was warmed to room temperature and stirred for 3 hr. The reaction mixture was poured into a mixture of concentrated hydrochloric acid (5 mL) and ice (100 g), and the mixture was stirred for 15 min. The mixture was extracted with ethyl acetate, and the ethyl acetate layer was washed with saturated aqueous sodium hydrogen carbonate and saturated brine, dried (MgSO4) and concentrated. The residue was subjected to silica gel column chromatography, and the title compound (632 mg, yield 61%) was obtained as a colorless oil from a fraction eluted with ethyl acetate-hexane (4:1, volume ratio). MS: 363 (MH+).

1. temperaturecooling
2. stirringthe mixture was stirred for 15 min
3. extractionThe mixture was extracted with ethyl acetate
4. washthe ethyl acetate layer was washed with saturated aqueous sodium hydrogen carbonate and saturated brine
5. dry with materialdried (MgSO4)
6. concentrationconcentrated