反应详情

A mixture of 3-iodo-2-methyl-benzoic acid (90 mmol, 23.6 g), methanol (250 mL), and concentrated sulfuric acid (13 mL) was refluxed with stirring for 40 h before it was concentrated in vacuo. The residue was dissolved in ethyl acetate and the mixture was neutralized by adding small portions of a saturated aqueous NaHCO3 solution with stirring. The organic phase was dried over MgSO4 and concentrated in vacuo to give the title compound as a yellowish oil (24.3 g); 1H NMR (CDCl3, 200 MHz): δ=7.96 (d, 1H), 7.71 (d, 1H), 6.91 (t, 1H), 3.89 (s, 3H), 2.66 (s, 3H).

1. temperaturewas refluxed
2. concentrationwas concentrated in vacuo
3. dissolutionThe residue was dissolved in ethyl acetate
4. additionby adding small portions of a saturated aqueous NaHCO3 solution
5. stirringwith stirring
6. dry with materialThe organic phase was dried over MgSO4
7. concentrationconcentrated in vacuo