Ammonia → 2,6-Dibromo-4-nitro-1-oxo-1lambda~5~-pyridine

Participants

Reaction Conditions

Reaction Steps

A solution of 2,6-dibromopyridine 1-oxide (34.0 g, 0.13 mol) in sulfuric acid (120 mL) was cooled to 0-5° C. followed by addition of nitric acid (60 mL). The reaction mixture was stirred at the same temperature for 10-15 min then heated to 60-65° C. for 20 h. The reaction was then cooled to rt, poured into ice-cold water and neutralized with aqueous ammonia solution. The resulting solution was stirred for 10 min at 0-5° C. then filtered and dried to obtain the desired product as a pale yellow solid (32 g, 83%).

Provenance & Evidence