反应详情

2-Bromo-N-[4-methoxy-3-(4-methyl-1-piperazinyl)phenyl]pyridine-5-carboxamide (0.125 g;0.31 mmol) was stirred with 4-pyridylboronic acid (0.038 g;0.31 mmol), tetrakis(triphenylphosphine)palladium(0) (0.024 g) and anhydrous sodium carbonate (0.036 g;0.34 mmol) in water (5 ml) and DME (5 ml) and the whole heated at reflux under Ar (18 hours). The reaction mixture was poured into 10% Na2CO3 (aq) (20 ml) and extracted into CHCl3. The organic extracts were combined, dried over Na2 SO4, filtered and the filtrate evaporated in vacuo to a brown gum. The gum was purified by flash silica-gel chromatography and eluted with 5%MeOH/CHCl3 to yield a orange/yellow gum(0.060 g;48%).

1. temperaturethe whole heated
2. temperatureat reflux under Ar (18 hours)
3. extractionextracted into CHCl3
4. customdried over Na2 SO4
5. filtrationfiltered
6. customthe filtrate evaporated in vacuo to a brown gum
7. customThe gum was purified by flash silica-gel chromatography
8. washeluted with 5%MeOH/CHCl3
9. customto yield a orange/yellow gum(0.060 g;48%)