反应详情

3-Butyryl-6-benzoyloxy-8-methoxy-4(1H)-quinolone (18.0 g) was heated under reflux in phosphorus oxychloride (100 ml) for 40 minutes. The solvent was evaporated and the residue dissolved in dichloromethane and poured into a vigorously stirred mixture of ice and sodium hydrogen carbonate solution. The organic phase was washed with sodium hydrogen carbonate solution, dried, filtered and evaporated to give 3-butyryl-6-benzyloxy-4-chloro-8-methoxy quinoline as a brown oil (25 g).

1. customThe solvent was evaporated
2. dissolutionthe residue dissolved in dichloromethane
3. additionpoured into a vigorously stirred mixture of ice and sodium hydrogen carbonate solution
4. washThe organic phase was washed with sodium hydrogen carbonate solution
5. customdried
6. filtrationfiltered
7. customevaporated