N-bromobutanimide → HCID 86683660, compound

Participants

Reaction Steps

7-bromo-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one (1.5 g, 6.55 mmol) and NBS (5.83, 32.7 mmol) were heated to 80° C. in DMF (30 ml) for 2 hours. The resulting reaction mixture was diluted with ethyl acetate (30 ml) and water (30 ml). The aqueous phase was extracted with fresh ethyl acetate (50 ml×3) and the combined organic layers were washed with brine (50 ml), dried on anhydrous Na2SO4, filtered and concentrated to dryness under reduced pressure to give the title compound (1.6 g, 79%). It was used for the next step without further purification. LCMS (Method D): RT=0.91 min, M+1=309.

Provenance & Evidence