反应详情

温度

80 °C

To a mixture of 2-bromopyridine (1.91 ml) and tetrakis(triphenylphosphine)palladium(0) (0.46 g) in 1,2-dimethoxyethane (40 ml) was added 2M aqueous solution of sodium bicarbonate (20 ml) and a solution of dihydroxy(3-nitrophenyl)borane (3.67 g) in methanol (10 ml). The mixture was stirred at 80° C. for 2.5 hours and cooled. Then the mixture was poured into aqueous sodium bicarbonate and extracted with ethyl acetate twice. The combined organic phase was washed with aqueous sodium bicarbonate and brine, dried over magnesium sulfate and concentrated. The residue was chromatographed on silica gel (hexane-ethyl acetate (3:1)) to give 2-(3-nitrophenyl)pyridine (1.35 g).

1. temperaturecooled
2. extractionextracted with ethyl acetate twice
3. washThe combined organic phase was washed with aqueous sodium bicarbonate and brine
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated
6. customThe residue was chromatographed on silica gel (hexane-ethyl acetate (3:1))