反应详情

温度

25 °C

A solution of 3-fluoro-4-(trifluoromethyl)phenylacetic acid (2.50 g, 11.25 mmol) in methanol (25 mL) was treated slowly with 4 drops of concentrated sulfuric acid. The resulting reaction mixture was heated under reflux for 15 h. The reaction mixture was allowed to cool to 25° C. and then concentrated in vacuo to remove methanol. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 1/1 hexanes/ethyl acetate) afforded (3-fluoro-4-trifluoromethyl-phenyl)-acetic acid methyl ester (2.58 g, 97%) as a colorless oil: EI-HRMS m/e calcd for C10H8F4O2 (M+) 236.0460, found 236.0457.

1. customThe resulting reaction mixture
2. temperaturewas heated
3. temperatureunder reflux for 15 h
4. concentrationconcentrated in vacuo
5. customto remove methanol