反应详情

To a solution of 4-chloro-3-(trifluoromethyl)benzonitrile (1.5 g), iron (III) acetylacetonate (130 mg), and 1-methylpyrrolidin-2-one (4 mL) in THF (45 mL) was added a 1 M solution of cyclopentyl magnesium bromide in THF (8.8 mL) at 5° C., followed by stirring at room temperature for 0.5 hours and diluting with diethylether. 1 M hydrochloric acid was slowly added thereto, followed by extraction with EtOAc. The organic layer was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:EtOAc=100:0 to 95:5) to obtain 4-cyclopentyl-3-(trifluoromethyl)benzonitrile (367 mg) as a white solid.

1. extractionfollowed by extraction with EtOAc
2. washThe organic layer was washed with brine
3. dry with materialdried over MgSO4
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane:EtOAc=100:0 to 95:5)