反应详情

To a solution (60 mL) of 5-bromo-1-(phenylsulfonyl)-1H-pyrrole-3-carbaldehyde (3.5 g) in methanol were added methylammonium chloride (7.5 g) and sodium cyanoborohydride (2.4 g), and the mixture was stirred at room temperature for 1 hr. The reaction mixture was concentrated under reduced pressure. Saturated aqueous sodium hydrogen carbonate was added to the residue, and the mixture was extracted with ethyl acetate. The extract was washed with saturated aqueous sodium hydrogen carbonate, water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give the title compound as a brown oil (yield 4.4 g, quantitative).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. additionSaturated aqueous sodium hydrogen carbonate was added to the residue
3. extractionthe mixture was extracted with ethyl acetate
4. washThe extract was washed with saturated aqueous sodium hydrogen carbonate, water and saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure