反应详情

A mixture of 2-ethyl-5,7-dimethyl-3-(5-tributylstannyl-indan-1-yl)-3H-imidazol[4,5-b]pyridine (224 mg, 0.41 mmol), methyl 2-iodobenzoate (131 mg, 0.5 mmol) and PdCl2 (PPh3)2 (28 mg, 0.04 mmol) was heated in anhydrous 1,4-dioxane for 20 hours. After cooling to room temperature, the reaction mixture was concentrated in vacuo and chromatographed on SiO2 -gel using a gradient of 30% EtOAc/hexanes to 50% EtOAc/hexanes to give 50 mg of a colorless oil. 1H NMR (250 MHz, CDCl3): d 7.80 (1 H, d), 7.55 (t, 1 H), 7.43 (t, 2 H), 7.30 (s, 1 H), 7.10 (d, 2 H), 6.90 (m, 2 H), 6.52 (m, 1H), 3.30 (m, 1 H), 3.15 (m, 1 H), 2.85 (q, 2 H), 2.65 (s, 3 H), 2.57 (s, 3 H), 0.90 (t, 3H.

1. concentrationthe reaction mixture was concentrated in vacuo
2. customchromatographed on SiO2