反应详情

A suspension of 3-hydroxybenzonitrile (5.00 g, 42.0 mmol) and 60% sodium hydride (oil dispersion, 2.01 g, 50.3 mmol) in DMF (200 mL) was stirred at room temperature for 30 min, ethyl 4-bromobutanoate (9.82 g, 50.3 mmol) was added thereto, and the mixture was stirred at room temperature for 15 hr. The mixture was allowed to cool to room temperature, and concentrated under reduced pressure. The residue was extracted with ethyl acetate and saturated aqueous ammonium chloride solution. The organic layer was washed with saturated aqueous ammonium chloride solution and saturated brine, dried over sodium sulfate, and concentrated. The obtained residue was purified by silica gel column chromatography (0-10% ethyl acetate/hexane) to give the title compound as a colorless oil (10.2 g, 100%).

1. stirringthe mixture was stirred at room temperature for 15 hr
2. temperatureto cool to room temperature
3. concentrationconcentrated under reduced pressure
4. extractionThe residue was extracted with ethyl acetate and saturated aqueous ammonium chloride solution
5. washThe organic layer was washed with saturated aqueous ammonium chloride solution and saturated brine
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated
8. customThe obtained residue was purified by silica gel column chromatography (0-10% ethyl acetate/hexane)