反应详情

温度

95 °C

A mixture of (4-(di-p-tolylamino)phenyl)boronic acid (Compound 26) (3.17 g, 10 mmol), 2-iodo-5-bromo-pyridine (5.68 g, 20 mmol), Pd(PPh3)4 (0.58 g, 0.5 mmol) and K2CO3 (2.76 g, 20 mmol) in dioxane/water (80 mL/15 mL) was degassed and heated at about 95° C. overnight. The resulting solution was diluted with ethyl acetate (200 mL), loaded on silica gel, and purified by flash column (hexanes to hexanes/dichloromethane 9:1 to 4:1 to 3:2). The desired fraction was collected and concentrated to give a light yellow solid (Compound 27) (3.5 g, in 82% yield).

1. customwas degassed
2. additionThe resulting solution was diluted with ethyl acetate (200 mL)
3. custompurified by flash column (hexanes to hexanes/dichloromethane 9:1 to 4:1 to 3:2)
4. customThe desired fraction was collected
5. concentrationconcentrated