反应详情

Tetrakis(triphenylphosphine)palladium(0) (0.2 g) was added to a solution of 3-bromo-4-methoxybenzldehyde (1.25 g) in toluene (10 ml) and ethanol (10 ml), followed by addition of 2M aqueous sodium carbonate (11 ml). To this mixture was added pyridine-3-boronic acid propane diol (1 g), and the mixture was heated to reflux. After 2 hours, the reaction was added to water (75 ml) and extracted with ethyl acetate (2×75 ml). The combined organic layers were washed with saturated aqueous sodium bicarbonate (100 ml) and brine (100 ml), dried over magnesium sulfate and concentrated. Chromatography (silica, 20-50% ethyl acetate/hexanes) afforded 1.08 g (87%) of 3-(3-pyridyl)-4-methoxybenzaldehyde as a white solid.

1. temperaturethe mixture was heated to reflux
2. extractionextracted with ethyl acetate (2×75 ml)
3. washThe combined organic layers were washed with saturated aqueous sodium bicarbonate (100 ml) and brine (100 ml)
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated