反应详情

温度

120 °C

To a solution (5 mL) of tert-butyl {[5-(4-bromo-3-thienyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl]methyl}methylcarbamate (470 mg) in N,N-dimethylformamide were added zinc cyanide (215 mg) and tetrakis(triphenylphosphine)palladium (212 mg) and the mixture was sufficiently degassed. The mixture was stirred with heating at 120° C. for 18 hr and cooled to room temperature. Water and ethyl acetate were added and the mixture was filtered through celite. The filtrate was concentrated under reduced pressure and the residue was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=4:1→2:1) to give the title compound as a pale-yellow oil (yield 297 mg, 71%).

1. customthe mixture was sufficiently degassed
2. temperaturecooled to room temperature
3. additionWater and ethyl acetate were added
4. filtrationthe mixture was filtered through celite
5. concentrationThe filtrate was concentrated under reduced pressure
6. extractionthe residue was extracted with ethyl acetate
7. washThe extract was washed with saturated brine
8. dry with materialdried over anhydrous sodium sulfate
9. concentrationconcentrated under reduced pressure
10. customThe residue was purified by silica gel column chromatography (eluent: hexane-ethyl acetate=4:1→2:1)