反应详情

N,N-Dimethylacetamide (15 mL) is added to a flask charged with a stir bar, 3-bromo-2-phenethyl-pyridine (3.34 g), freshly dried K2CO3 (3.52 g), palladium(II) acetate (0.14 g), and tricyclohexylphosphonium tetrafluoroborate (0.47 g) and kept under argon atmosphere at room temperature. The flask is put into a 150° C. hot oil bath and the mixture is stirred therein for 2 h. After cooling the mixture to room temperature, the solvent is evaporated and the residue is chromatographed twice on silica gel (1. dichloromethane/methanol 98:2; 2. cyclohexane/ethyl acetate 90:10→50:50) to afford the title compound as an oil. Yield: 1.51 g (65% of theory); LC (method 1): tR=1.83 min; Mass spectrum (ESI+): m/z=182 [m+H]+.

1. additioncharged with a stir bar
2. customkept under argon atmosphere at room temperature
3. customis put into a 150° C.
4. customthe solvent is evaporated
5. customthe residue is chromatographed twice on silica gel (1. dichloromethane/methanol 98:2; 2. cyclohexane/ethyl acetate 90:10→50:50)