反应详情

To a solution of 4-mercaptobenzoic acid (Apin, 1.72 g, 11.17 mmol) in anhydrous methyl alcohol (20.0 mL) was added concentrated sulfuric acid (0.43 mL). The reaction mixture is then warmed to reflux for 16 h, concentrated in vacuo, diluted with ethyl acetate (100 mL) and washed with saturated sodium bicarbonate (2×100 mL). The organic phase is then separated, dried over anhydrous magnesium sulfate and concentrated in vacuo to give 712 mg (Y: 38%) of the title product; 1H-NMR (CDCl3): δ7.89 (d, J=8.7 Hz, 2H), 7.29 (d, J=8.7 Hz, 2H), 3.90 (s, 3H), 3.60 (s, 1H).

1. temperatureThe reaction mixture is then warmed
2. temperatureto reflux for 16 h
3. concentrationconcentrated in vacuo
4. additiondiluted with ethyl acetate (100 mL)
5. washwashed with saturated sodium bicarbonate (2×100 mL)
6. customThe organic phase is then separated
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated in vacuo