反应详情

温度

85 °C

A mixture of 6-bromo-2-chloro-7-methoxyquinazoline (2.4 g, 8.82 mmol), 3,5-dimethoxyphenylboronic acid (1.6 g, 8.82 mmol), cerium carbonate (8.6 g, 26.46 mmol) and Pd(PPh3)2Cl2 (1.4 g, 2.1 mmol) in THF (10 mL), dioxane (10 mL) and water (2 mL) was degassed with nitrogen three times and stirred at 85° C. for 3 hours. The mixture was cooled to room temperature and extracted with dichloromethane (3×50 mL). The organic layers were separated, combined, washed with water and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by silica gel chromatography (petroleum ether: ethyl acetate=1:4) to give the title compound (1.1 g, 38%) as a white solid. MS (ES+) C17H15ClN2O3 requires: 330, 332, found: 331, 333 [M+H]+.

1. customwas degassed with nitrogen three times
2. temperatureThe mixture was cooled to room temperature
3. extractionextracted with dichloromethane (3×50 mL)
4. customThe organic layers were separated
5. washwashed with water and brine
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by silica gel chromatography (petroleum ether: ethyl acetate=1:4)