反应详情

To a mixture of (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (6.7 g, 0.012 mol), tris(dibenzylideneacetone)dipalladium(0) (10.0 g, 0.012 mol), 6-bromoquinoline (120.0 g, 0.577 mol) in DMF (360 mL) in a 3-neck round bottom flask with stirring under an atmosphere of nitrogen was added (trimethylsilyl)acetonitrile (98.7 mL, 0.721 mol), followed by zinc difluoride (42 g, 0.40 mol). The flask was sealed under an atmosphere of nitrogen. The reaction was stirred at 105° C. for 20 h. After cooling the solution to RT, the reaction mixture was quenched with aqueous ammonia solution and extracted with ethyl acetate (3×500 mL). The combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was chromatographed on a silica gel column (ethyl acetate in hexanes: 0-65%) to afford the desired product quinolin-6-ylacetonitrile (70 g, 72.1%). Analytical LCMS: (M+H)+=168.9.

1. customThe flask was sealed under an atmosphere of nitrogen
2. stirringThe reaction was stirred at 105° C. for 20 h
3. customthe reaction mixture was quenched with aqueous ammonia solution
4. extractionextracted with ethyl acetate (3×500 mL)
5. washThe combined organic layers were washed with brine
6. dry with materialdried over anhydrous Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe residue was chromatographed on a silica gel column (ethyl acetate in hexanes: 0-65%)