反应详情

To a solution of 5-(2-methylphenyl)-1H-pyrrole-3-carbaldehyde (371 mg) in tetrahydrofuran (10 mL) were added sodium hydride (60% in oil, 288 mg) and 15-crown-5 (1.32 g) at room temperature. After stirring for 5 min, a suspension of pyridine-3-sulfonyl chloride hydrochloride (642 mg) in N,N-dimethylformamide (5 mL) was added at the same temperature. After stirring for 15 min, ice water was added, and the mixture 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=6:1→3:1) to give the title compound as a red oil (yield 521 mg, 80%).

1. additionwas added at the same temperature
2. stirringAfter stirring for 15 min
3. extractionthe mixture was extracted with ethyl acetate
4. washThe extract was washed with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=6:1→3:1)