反应详情

To a solution (120 mL) of 1-benzothiophene (11.2 g) in tetrahydrofuran was added m-chloroperbenzoic acid (70% containing, 43.1 g) at 0° C. and the mixture was stirred at the same temperature for 1 hr, further stirred at room temperature for 1 hr. An aqueous sodium thiosulfate solution (50 mL) was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with 1 mol/L aqueous sodium hydroxide solution, saturated aqueous sodium hydrogencarbonate solution, water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was recrystallized from ethyl acetate to give the title compound as a white solid (yield 10.3 g, 74%).

1. stirringfurther stirred at room temperature for 1 hr
2. extractionthe mixture was extracted with ethyl acetate
3. washThe extract was washed with 1 mol/L aqueous sodium hydroxide solution, saturated aqueous sodium hydrogencarbonate solution, water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe residue was recrystallized from ethyl acetate