反应详情

温度

70 °C

To a solution of 4-fluorophenol (8.0 g, 71.4 mmol) in dimethylformamide (130.0 mL) was added potassium carbonate (13.5 g, 97.4 mmol) and 2-bromopentan-3-one (836) (10.7 g, 64.9 mmol). The suspension was heated at 70° C. for 18 h, cooled to room temperature, diluted with water (50 mL), and extracted with ethyl acetate (2×25 mL). The organic layers were combined, dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by chromatography (0-20% EtOAc in hexanes) to provide the desired 2-(4-fluorophenoxy)pentan-3-one (837) (5.2 g, 40.8%) as a colorless oil.

1. temperaturecooled to room temperature
2. extractionextracted with ethyl acetate (2×25 mL)
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified by chromatography (0-20% EtOAc in hexanes)