反应详情

To a solution of 2-mercapto-benzoic acid (30 g, 0.195 mol) in isopropanol (500 mL) at room temperature were added 1-fluoro-2-nitro-benzene (30.2 g, 0.214 mol), water (100 mL) and potassium hydroxide (31.1 g, 0.555 mol). The reaction mixture was stirred at room temperature overnight, quenched with water and diluted with ethyl acetate. The aqueous phase was extracted with ethyl acetate (3×400 mL) and the combined organic extracts were washed with saturated aqueous sodium chloride (500 mL), dried over magnesium sulfate, filtered, and concentrated. The crude residue was purified by flash column chromatography on silica gel to give the title compound. ESI-MS (M+1): 276 calc. for C13H9NO4S 275. 1H NMR: (CDCl3, 400 MHz): δ (ppm) 8.12-8.07 (m, 2H), 7.54-7.43 (m, 2H), 7.42-7.39 (m, 2H), 7.35-7.31 (m, 1H), 7.12-7.09 (m, 1H).

1. customquenched with water
2. additiondiluted with ethyl acetate
3. extractionThe aqueous phase was extracted with ethyl acetate (3×400 mL)
4. washthe combined organic extracts were washed with saturated aqueous sodium chloride (500 mL)
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude residue was purified by flash column chromatography on silica gel