反应详情

温度

50 °C

To a solution of methyl 4-ethoxy-3-(hydroxymethyl)benzoate (1.6 g, 7.61 mmol) in dioxane (10 mL) was added NaOH (6.0 g, 37.5 mmol) and the reaction mixture was heated at 50° C. for 2 hours. The reaction mixture was concentrated in vacuo to half-volume, acidified to pH 2 with aq. 6N HCl solution. The resulting suspension was filtered, the solid rinsed with water and acetonitrile, then dried in vacuo to give 4-ethoxy-3-(hydroxymethyl)benzoic acid (740 mg, 50%) as a white solid. 1H NMR (400 MHz, DMSO) δ 12.51 (s, 1H), 8.00 (s, 1H), 7.81 (dd, J=8.5, 2.2 Hz, 1H), 7.01 (d, J=8.6 Hz, 1H), 5.13 (t, J=5.7 Hz, 1H), 4.50 (d, J=5.2 Hz, 2H), 4.11 (q, J=7.0 Hz, 2H), 1.34 (t, J=7.0 Hz, 3H).

1. concentrationThe reaction mixture was concentrated in vacuo to half-volume
2. filtrationThe resulting suspension was filtered
3. washthe solid rinsed with water and acetonitrile
4. customdried in vacuo