反应详情

温度

140 °C

Methyl 4-amino-6-chloro-5-fluoropicolinate (1.9 g, 9.29 mmol) and bis(triphenylphosphine)palladium(II) dichloride (0.326 g, 0.464 mmol) were combined in dichloroethane (30 ml) and tributyl(vinyl)stannane (3.26 ml, 11.14 mmol) was added. The reaction mixture was heated in a microwave reactor at 140° C. for 2 hrs. The cooled reaction mixture was purified by flash chromatography (SiO2, 0-40% THF:Hex gradient) to provide the title compound as a white solid (0.9 g, 4.59 mmol, 49.4% yield): 1H NMR (400 MHz, DMSO-d6) δ 3.83 (s, 3H), 5.57 (dd, J=10.9, 2.2 Hz, 1H), 6.28 (dd, J=17.3, 2.2 Hz, 1H), 6.54 (s, 2H), 6.84-6.97 (m, 1H), 7.37 (d, J=6.7 Hz, 1H); 19F NMR (376 MHz, DMSO-d6) δ −148.25; ESIMS m/z 197 ([M+H]+), 195 ([M−H]−).

1. customThe cooled reaction mixture
2. customwas purified by flash chromatography (SiO2, 0-40% THF:Hex gradient)