反应详情

温度

145 °C

A mixture of 2-bromo-4-[(4-methoxy-3-methylphenyl)(oxo)acetyl]benzonitrile (200 mg, 0.56 mmol) and 3-(tributylstannyl)pyridine (268 mg, 0.73 mmol) in 1,2-diethoxyethane is treated with dichlorobis(tri-o-tolylphosphine)palladium(II) (39.6 mg, 0.05 mmol), heated at 145° C., stirred for 30 min. and filtered to remove the catalyst. The filtrate is evaporated to dryness. The resultant residue is purified by flash chromatography (SiO2, 2/1 hexanes/EtOAc as eluent) and crystallization from ethyl ether/hexanes to afford the title compound as a yellow solid, 181 mg (91% yield), identified by HNMR and mass spectral analyses. MS m/e 357 (M+H)+; 1H NMR (400 MHz, DMSO-d6) δ 2.21 (s, 3H), 3.93 (s, 3H), 7.18 (d, J=8.69 Hz, 1H), 7.61 (m, 1H), 7.82 (d, J=8.54, 1H), 7.84 (dd, J=8.54, 1.99 Hz 1 H), 8.07 (dd, J=7.76, 1.67 Hz, 1H), 8.12 (m, J=1.38 Hz, 2H), 8.25 (d, J=8.08 Hz, 1H), 8.74 (m, 1H), 8.85 (d, 1.68 Hz, 1H).

1. filtrationfiltered
2. customto remove the catalyst
3. customThe filtrate is evaporated to dryness
4. customThe resultant residue is purified by flash chromatography (SiO2, 2/1 hexanes/EtOAc as eluent) and crystallization from ethyl ether/hexanes