反应详情

To a solution of 2-(methylthio)-5-[3-[3-(trifluoromethoxy)phenyl]-1-benzofuran-5-yl]-1,3,4-oxadiazole (2.38 g, 6.07 mmol) in acetonitrile (25 mL) was added m-chloroperbenzoic acid (70%, 3.20 g, 13.3 mmol) at 0° C., and the resulting mixture was stirred overnight at room temperature. A saturated aqueous sodium thiosulfate solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1) to give the title compound (0.87 g, yield 34%) as colorless crystals.

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with water and saturated brine
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1)