反应详情

温度

0 °C

The crude propyl 3-methyl-4-propoxybenzoate was dissolved in methanol (25 mL) and water (50 mL) and treated with solid sodium hydroxide (31.6 g, 789 mmol). The reaction mixture was refluxed for 1 h. The reaction mixture cooled to 0° C. and acidified with 12 M HCl (74 mL, 890 mmol). The resulting solid filtered to provide 3-methyl-4-propoxy-benzoic acid (3.22 g, 16.6 mmol, 84%) as a light pink solid. ESI-MS m/z calc. 194.0943. Found 195.3 (M+1)+; Retention time: 1.41 minutes (3 min run). 1H NMR (400 MHz, DMSO-d6) δ 12.50 (s, 1H), 7.77 (dd, J=8.5, 2.2 Hz, 1H), 7.73 (d, J=1.4 Hz, 1H), 6.99 (d, J=8.6 Hz, 1H), 4.01 (t, J=6.4 Hz, 2H), 2.18 (s, 3H), 1.82-1.69 (m, 2H), 1.01 (t, J=7.4 Hz, 3H).

1. temperatureThe reaction mixture was refluxed for 1 h
2. filtrationThe resulting solid filtered