反应详情

温度

70 °C

A mixture of 2-(2-ethynylphenyl)acetamide (I8) (5.40 g, 33.9 mmol), 2,4-dichloro-5-methylpyrimidine (6.63 g, 40.7 mmol) and CuI (0.129 g, 0.678 mmol) in 1,4-dioxane (180 mL) and Et3N (14.2 mL, 101 mmol) was placed under nitrogen. PdCl2(PPh3)2 (0.238 g, 0.339 mmol) was added and the resulting mixture was stirred at 70° C. for 20 minutes, then adsorbed onto silica gel and purified by column chromatography (CombiFlash Rf, 120 g SiO2 Cartridge, 0-5% MeOH in DCM) to give the title compound I9 as a yellow solid (5.01 g, 51%); 1H NMR (300 MHz, d6-DMSO) δ 8.75 (s, 1H), 7.67 (d, J=7.5 Hz, 1H), 7.35-7.52 (m, 4H), 6.97 (brs, 1H), 3.71 (s, 2H), 2.42 (s, 3H). LCMS-B: rt 5.689 min; m/z 286 [M+H]+.

1. custompurified by column chromatography (CombiFlash Rf, 120 g SiO2 Cartridge, 0-5% MeOH in DCM)