反应详情

To a solution of (3-amino-5-ethoxy-4-iodo-phenyl)-methanol (4.9 g, 16.72 mmol, 1.0 equiv) in dichloromethane (100 mL) was added activated MnO2 (7.27 g, 83.59 mmol, 5.0 equiv) and the reaction mixture heated to reflux for 3 h. Filtration through Hyflo Super Cel, concentration by evaporation under reduced pressure and purification with column chromatography on silica eluting with hexane/ethyl acetate (3:1) yielded 3.14 g (60%) of the title compound. 1H NMR (300 MHz, DMSO): δ 1.37 (t, J=7.0 Hz, 3H), 4.15 (q, J=7.0 Hz, 2H), 4.49 (d, J=5.6 Hz, 2H), 5.21 (t, J=5.6 Hz, 1H), 6.82 (s, 1H), 6.85 (s, 1H), 11.64 (br s, 1H). 13C NMR (75 MHz, DMSO): δ 14.61, 62.89, 64.26, 100.74, 106.46, 117.80, 137.50, 142.74, 144.05, 154.54. MS (ISP): 291.9 [M+H]+.

1. temperaturethe reaction mixture heated
2. temperatureto reflux for 3 h
3. filtrationFiltration
4. concentrationthrough Hyflo Super Cel, concentration
5. customby evaporation
6. customunder reduced pressure and purification with column chromatography on silica eluting with hexane/ethyl acetate (3:1)