Sodium Thiosulfate → 2-(Methylsulfonyl)-5-[3-[3-(trifluoromethoxy)phenyl]-1-benzofuran-5-yl]-1,3,4-oxadiazole

Participants

Reaction Steps

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.

Provenance & Evidence