反应详情

To a suspension of sodium hydride (60% in oil, 25 g) in tetrahydrofuran (750 mL) was added dropwise a solution of ethyl 3-oxohexanoate (164 g) in tetrahydrofuran (250 mL) at 0° C. The reaction mixture was stirred at room temperature for 1 hr, and a solution of 4′-(bromomethyl)-3′-fluorobiphenyl-2-carbonitrile in benzotrifluoride above mentioned was added at 0° C. The reaction mixture was further stirred at room temperature for 16 hr, and added to 1 M hydrochloric acid (1.0 L), and the obtained mixture was concentrated under reduced pressure. The obtained mixture was extracted with ethyl acetate, and the obtained extract was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the obtained residue was purified by silica gel column chromatography to give the title compound as a colorless oil (145 g, 76%).

1. stirringThe reaction mixture was further stirred at room temperature for 16 hr
2. concentrationthe obtained mixture was concentrated under reduced pressure
3. extractionThe obtained mixture was extracted with ethyl acetate
4. extractionthe obtained extract
5. washwas washed with saturated brine
6. dry with materialdried over anhydrous magnesium sulfate
7. customThe solvent was evaporated under reduced pressure
8. customthe obtained residue was purified by silica gel column chromatography