反应详情

To a suspension of EtONH2.HCl (1.05 g, 10.8 mmol) in pyridine (5 ml) was added 6-bromo-4-hydroxy-1H-1,5-naphthyridin-2-one (324 mg, 1.34 mmol) and stirring was continued for 17 h at 100° C. The mixture was allowed to cool to ambient temperature then water and ethyl acetate were added followed by separation of phases. The aqueous phase was extracted with ethyl acetate and the combined organic phases were dried over Na2SO4, filtered and concentrated in vacuo. Purification by flash chromatography eluting with ethyl acetate/MeOH, gradient, afforded 6-bromo-4-(ethoxyamino)-1H-1,5-naphthyridin-2-one.

1. customfollowed by separation of phases
2. extractionThe aqueous phase was extracted with ethyl acetate
3. dry with materialthe combined organic phases were dried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification by flash chromatography
7. washeluting with ethyl acetate/MeOH, gradient