反应详情

To a solution of 2-phenyl-1H-imidazole-4-carbaldehyde (1.73 g) in N,N-dimethylformamide (35 mL) was added sodium hydride (60% in oil, 483 mg) at room temperature, and the mixture was stirred for 1 hr. 4-Methylphenylsulfonyl chloride (1.92 g) was added, and the mixture was stirred at 50° C. for 30 min. The reaction mixture was cooled, water was added, and the mixture was extracted with ethyl acetate. The extract was washed with water, 1 mol/L hydrochloric acid and saturated aqueous sodium hydrogen carbonate solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=9:1→7:3), and crystallized from diisopropyl ether to give the title compound as colorless crystals (yield 1.95 g, 60%).

1. stirringthe mixture was stirred at 50° C. for 30 min
2. temperatureThe reaction mixture was cooled
3. extractionthe mixture was extracted with ethyl acetate
4. washThe extract was washed with water, 1 mol/L hydrochloric acid and saturated aqueous sodium hydrogen carbonate solution
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=9:1→7:3)
8. customcrystallized from diisopropyl ether