反应详情

温度

80 °C

To a 250 ml round bottomed flask was added 4,6-dichloropyrimidine (2.67 g, 17.95 mmol), 2-methoxyphenyl boronic acid (3.00 g, 19.7 mmol), acetonitrile (50 ml) and sodium carbonate (2.95 g, 26.9 mmol). The mixture was sparged with nitrogen for 15 minutes, Pd(PPh3)4 (0.48 g, 0.41 mmol) was then added, and the resulting yellow mixture was heated under an atmosphere of nitrogen at 80° C. for 48 hours. After cooling, the solution was diluted with aqueous NaHCO3 and extracted with dichloromethane. The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuum. Purification of the residue by silica gel chromatography (2 to 5% ethyl acetate/hexane) afforded 4-chloro-6-(2-methoxy-phenyl)-pyrimidine as a white solid. Yield: 2.5 g

1. customThe mixture was sparged with nitrogen for 15 minutes
2. temperatureAfter cooling
3. extractionextracted with dichloromethane
4. dry with materialThe combined organic extracts were dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuum
7. customPurification of the residue by silica gel chromatography (2 to 5% ethyl acetate/hexane)