Acetic Acid → HCID 90410414, compound

Participants

Reaction Steps

The 4-piperidin-2-yl-4,5-dihydroimidazo[1,5,4-de][1,4]benzoxazin-2(1H)-one (0.20 g, 0.77 mmol) of Step 1 was dissolved in acetic acid (10.0 mL, 176 mmol) at room temperature and N-bromosuccinimide (0.14 g, 0.77 mmol) was slowly added. The reaction was stirred for 2 h and was concentrated in vacuo to give a residue. The residue was dissolved in ethyl acetate, washed with aqueous potassium carbonate, washed with brine, dried over magnesium sulfate, and concentrated to give 7-bromo-4-piperidin-2-yl-4,5-dihydroimidazo[1,5,4-de][1,4]benzoxazin-2(1H)-one as a dark oil (0.22 g, 85%). LCMS calculated for C14H17BrN3O2 (M+H)+: m/z=338.0, 340.0. found: 338.0, 340.0.

Provenance & Evidence