反应详情

温度

110 °C

To a stirred solution of (3-bromo-pyridin-2-yl)-acetonitrile (158) (1 g, 5.07 mmol) and phenyl boronic acid (928 mg g, 7.16 mmol) in a solvent mixture of toluene (25 mL) and ethanol (25 mL) was added K2CO3 (2.1 g, 15.23 mmol). The mixture was degassed by argon, X-Phos (484 mg, 1.01 mmol) and Pd(triphenyl phosphine)4 (586 mg g, 0.51 mmol) were added and the mixture was again degassed. The reaction mixture was refluxed (110° C.) for 4 h. Silica thin layer chromatography was performed (30% ethyl acetate in hexane, Rf=0.45). The catalyst was filtered off through a celite bed, washing with ethyl acetate (3×50 mL) was conducted, the mixture was concentrated, the crude product was purified by a CombiFlash column (eluted at 15% ethyl acetate in hexane) to get (3-phenyl-pyridin-2-yl)-acetonitrile (159) (930 mg, 94.34%) as a light yellow solid.

1. additionwere added
2. customthe mixture was again degassed
3. filtrationThe catalyst was filtered off through a celite bed
4. washwashing with ethyl acetate (3×50 mL)
5. concentrationthe mixture was concentrated
6. customthe crude product was purified by a CombiFlash column (eluted at 15% ethyl acetate in hexane)