反应详情

温度

80 °C

To a mixture of ethyl 2-fluoro-3,6-dimethoxybenzoate (8.1 g, 35.5 mmol) in methanol (150 mL) and water (50 mL), lithium hydroxide (7.5 g, 178 mmol) was added. The resulting mixture was heated at 80° C. for 5 h. The reaction mixture was concentrated to remove methanol, acidified with 2 M HCl until pH 4, and extracted with dichloromethane (4×200 mL). The combined organic layers were dried (Na2SO4) and concentrated under reduced pressure to give the title compound (6.98 g). 1H NMR (DMSO-d6): δ 13.39 (br s, 1H), 7.19 (t, 1H), 6.82 (dd, 1H), 3.79 (s, 3H), 3.75 (s, 3H).

1. additionwas added
2. concentrationThe reaction mixture was concentrated
3. customto remove methanol
4. extractionextracted with dichloromethane (4×200 mL)
5. dry with materialThe combined organic layers were dried (Na2SO4)
6. concentrationconcentrated under reduced pressure