反应详情

Add bis(triphenylphosphine)palladium (II) dichloride (93 mg, 0.13 mmol), copper (I) iodide (50 mg, 0.26 mmol), and 3-ethynyl-5-methoxypyridine, (prepared as described in PREPARATION 10), (350 mg, 2.6 mmol) to a solution of 2-bromo-1-fluoro-4-iodobenzene, (prepared as described in PREPARATION 43), (1.03 g, 3.4 mmol) in triethylamine (4.0 mL, 39.5 mmol). Stir at room temperature for 20 h then concentrate. Purify by silica gel chromatography, eluting with 100:0 to 80:20 dichloromethane:ethyl acetate, followed by a second silica gel chromatography, eluting with 75:25 to 60:40 hexanes:ethyl acetate, to give the title compound as a white solid (750 mg, 93%).

1. concentrationthen concentrate
2. customPurify by silica gel chromatography
3. washeluting with 100:0 to 80:20 dichloromethane
4. washeluting with 75:25 to 60:40 hexanes