反应详情

温度

55 °C

A mixture of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenol (300 mg, 1.36 mmol), 2,5-dibromo-3-nitropyridine (383 mg, 1.36 mmol), tetrakis(triphenylphosphine)palladium (31 mg, 0.027 mmol), Na2CO3 (4.3 mL, 2 M aqueous), 4.3 mL toluene, and 2.1 mL EtOH was vigorously stirred at 55° C. for 2 h. After cooling to rt, the volatiles were removed under reduced pressure and the residue was purified with silica chromatography (EtOAc in hexane, 5% to 35%) to afford 4-(5-bromo-3-nitropyridin-2-yl)phenol as a yellow wax (285 mg, 71%). MS (ESI) m/z [M+H]+295, 297.

1. temperatureAfter cooling to rt
2. customthe volatiles were removed under reduced pressure
3. customthe residue was purified with silica chromatography (EtOAc in hexane, 5% to 35%)