反应详情

温度

23 °C

To a solution of 2-ethyl-5,7-dimethyl-3-(5-tributylstannanyl-indan-1-yl)-3H-imidazo[4,5-b]pyridine (264 mg, 0.48 mmol) in anhydrous dioxane (1.5 mL) was added 2-bromobenzonitrile (109 mg, 0.6 mmol) and PdCl2 (PPh3)2 (34 mg, 0.048 mmol). The reaction mixture was heated under reflux for 17 hours, cooled to 23° C. and concentrated in vacuo. The crude residue was chromatographed on SiO2 -gel using 30% ethyl acetate/hexanes to give 100 mg of the desired product. 1H NMR (250 MHz, CDCl3): d 7.75 (1H, m), 7.64 (1H, m), 7.55 (m, 2 H), 7.35 (t, 1 H), 7.00 (d, 1 H), 6.9 (s, 1 H), 6.6 (m, 1 H), 3.4 (m, 2 H), 2.95 (m, 1 H), 2.65 (s, 3 H), 2.58 (s, 3 H), 1.3 (t, 3 H).

1. temperatureThe reaction mixture was heated
2. temperatureunder reflux for 17 hours
3. concentrationconcentrated in vacuo
4. customThe crude residue was chromatographed on SiO2