反应详情

To a solution of 2-phenyl-1H-imidazole-4-carbaldehyde (1.73 g) in N,N-dimethylformamide (30 mL) was added sodium hydride (60% in oil, 523 mg) at room temperature, and the mixture was stirred for 1 hr. Mesitylsulfonyl chloride (2.42 g) was added, and the mixture was stirred for 1 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated aqueous sodium hydrogen carbonate solution, 3% aqueous potassium hydrogensulfate solution and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=7:3→3:2) to give the title compound as a pale-yellow oil (yield 1.76 g, 49%).

1. stirringthe mixture was stirred for 1 hr
2. extractionthe mixture was extracted with ethyl acetate
3. washThe extract was washed with saturated aqueous sodium hydrogen carbonate solution, 3% aqueous potassium hydrogensulfate solution and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (eluent:hexane-ethyl acetate=7:3→3:2)