反应详情

2,4-Dimethoxy-pyrimidine-5-boronic acid (842 mg, 4.60 mmol) was dissolved in degassed n-PrOH (55 ml) and then 2-fluoro-3-bromo-5-methylpyridine (800 mg, 4.21 mmol), Na2CO3 (1.46 g, 13.77 mmol), PPh3 (348 mg, 1.33 mmol) and Pd(OAc)2 (101 mg, 0.45 mmol) were added. The suspension was stirred at reflux for 2 hours. After cooling, the solvent was evaporated under vacuum and the crude was partitioned between water and ethyl acetate. The organic phase was dried (Na2SO4) and evaporated. The residue was triturated with Et2O to give 350 mg of the title compound as a gray powder (31% yield).

1. temperatureat reflux for 2 hours
2. temperatureAfter cooling
3. customthe solvent was evaporated under vacuum
4. customthe crude was partitioned between water and ethyl acetate
5. dry with materialThe organic phase was dried (Na2SO4)
6. customevaporated
7. customThe residue was triturated with Et2O