反应详情

Part A. A solution of 4-bromopyridine (1.0 g, 5.2 mmol) in acetonitrile-water (10 mL/5 mL) is treated with 3-carboethoxybenzeneboronic acid (0.93 g, 5.2 mmol), sodium carbonate (2.2 g, 21 mmol) and catalytic tetrakis(triphenylphosphine)palladium. The solution is heated to reflux for 12 h., then cooled and extracted with ethyl acetate. The extract is washed with brine, dried over sodium sulfate, filtered and evaporated. The residual material is separated by flash chromatography to afford ethyl 3-pyridin-4-yl-benzoate (1.0 g, 86%).

1. temperatureThe solution is heated
2. temperatureto reflux for 12 h.
3. temperaturecooled
4. extractionextracted with ethyl acetate
5. washThe extract is washed with brine
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. customevaporated
9. customThe residual material is separated by flash chromatography