反应详情

温度

70 °C

A mixture of 5-bromo-4,6-dimethoxypyrimidine (2.18 g, 10 mmol), pyridine-4-boronic acid (1.85 g, 15 mmol), K2CO3 (2.76 g, 20 mmol), and PXPd (539 mg, 1.0 mmol) in ethanol/THF (1:1, 25 mL) under argon was heated at 70° C. for 3 h. Analysis by HPLC/MS indicated that the reaction was complete. After the reaction mixture was cooled to room temperature, the solvent mixture was removed under reduced pressure. The residue was dissolved in EtOAc (30 mL) and washed with saturated aqueous NaCl (20 mL), then dried over Na2SO4, filtered and evaporated under reduced pressure. The crude product was purified by silica gel column chromatography eluted with ethyl acetate-hexanes to obtain the title compound (1.79 g) as a white solid. 1H NMR (CDCl3): δ 3.97 (s, 6H), 7.36 (d, 2H), 8.47 (s, 1H), 8.64 (d, 2H).

1. temperatureAfter the reaction mixture was cooled to room temperature
2. customthe solvent mixture was removed under reduced pressure
3. dissolutionThe residue was dissolved in EtOAc (30 mL)
4. washwashed with saturated aqueous NaCl (20 mL)
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. customevaporated under reduced pressure
8. customThe crude product was purified by silica gel column chromatography
9. washeluted with ethyl acetate-hexanes