反应详情

A mixture of N-{3-hydroxy-4-[2-(2-methoxy-ethoxy)-1,1-dimethyl-ethyl]-phenyl}-acetamide (1 g, 3.5 mmol) and HCl (5 mL) was heated at reflux for 1 h. The mixture was basified with Na2CO3 solution to pH 9 and then extracted with EtOAc (20 mL×3). The combined organic layers were washed with water and brine, dried over Na2SO4 and concentrated to dryness. The residue was purified by column chromatography (petroleum ether-EtOAc, 100:1) to obtain 2-(1-(2-methoxyethoxy)-2-methylpropan-2-yl)-5-aminophenol (C-25) (61 mg, 6%). 1H NMR (CDCl3) δ 9.11 (br s, 1H), 6.96-6.98 (d, J=8 Hz, 1H), 6.26-6.27 (d, J=4 Hz, 1H), 6.17-6.19 (m, 1H), 3.68-3.69 (m, 2H), 3.56-3.59 (m, 4H), 3.39 (s, 3H), 1.37 (s, 6H); ESI-MS 239.9 m/z (MH+).

1. temperaturewas heated
2. temperatureat reflux for 1 h
3. extractionextracted with EtOAc (20 mL×3)
4. washThe combined organic layers were washed with water and brine
5. dry with materialdried over Na2SO4
6. concentrationconcentrated to dryness
7. customThe residue was purified by column chromatography (petroleum ether-EtOAc, 100:1)