反应详情

温度

100 °C

POCl3 (8.5 ml) was added to [1,5]naphthyridine 1-oxide 483 (0.85 g, 5.81 mmol) at 0° C. and the mixture was heated at 100° C. for 6 h. After cooling, the mixture was concentrated in vacuo, neutralized with NaHCO3 solution and the aqueous phase was extracted with EtOAc (40 ml). The organic phase was washed with water and brine, dried (Na2SO4) and concentrated in vacuo. The crude residue was purified by column chromatography with n-hexane/EtOAc (88:12) as the eluent to give the title compound (0.35 g, 36%).

1. temperatureAfter cooling
2. concentrationthe mixture was concentrated in vacuo
3. extractionthe aqueous phase was extracted with EtOAc (40 ml)
4. washThe organic phase was washed with water and brine
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated in vacuo
7. customThe crude residue was purified by column chromatography with n-hexane/EtOAc (88:12) as the eluent