反应详情

Ethyl 3-(2-fluoro-4-methylphenyl)-3-oxo-2-phenylpropanoate (8.0 g, 26.6 mmol) was dissolved in THF (20 mL) and hydrogen chloride (37% wt., 32.0 mL, 400 mmol) was added. The reaction was brought to reflux overnight. After cooled to room temperature, the reaction was diluted with H2O (100 mL) and neutralized to pH 8 with NaOH (4.0 M aq.). The mixture was extracted with EtOAc (3×75 mL), dried over MgSO4, and purified by column chromatography to give the title compound as a clear oil (4.81 g). LCMS m/z=229.1 [M+H]+; 1H NMR (400 MHz, DMSO-d6) δ ppm 2.36 (s, 3H), 4.28 (s, 2H), 7.11-7.18 (m, 2H), 7.19-7.26 (m, 3H), 7.27-7.34 (m, 2H), 7.77 (t, J=8.21 Hz, 1H).

1. temperatureto reflux overnight
2. extractionThe mixture was extracted with EtOAc (3×75 mL)
3. dry with materialdried over MgSO4
4. custompurified by column chromatography