反应详情

温度

105 °C

A mixture of 4-bromo-6-(2,6-diethyl-phenyl)-2-methyl-nicotinic ethyl ester (308 mg, 0.82 mmol), methyl propargyl ether (0.69 mL, 8.2 mmol), Pd(PPh3)4 (95 mg, 0.082 mmol), and copper iodide (8 mg, 0.041 mmol) in diisopropylamine (8 mL) is heated at 105° C. in a sealed tube. After filtration through celite, the filtrate is concentrated in vacuo and the residue purified by flash chromatography to give 6-(2,6-diethyl-phenyl)-4-(3-methoxy-propyn-1-yl)-2-methyl-nicotinic acid ethyl ester as a yellow oil. 1H NMR (CDCl3) 7.36-7.29 (m, 2H), 7.20-7.15 (m, 2H), 4.47 (q, 2H), 4.32 (s, 2H), 3.41 (s, 3H), 2.62 (s, 3H), 2.38-2.27 (m, 4H), 1.41 (t, 3H), 1.06 (t, 6H).

1. filtrationAfter filtration through celite
2. concentrationthe filtrate is concentrated in vacuo
3. customthe residue purified by flash chromatography