Nitric Acid → HCID 178514693, compound

Participants

Reaction Steps

To a solution of 1,0 g (3,4 mmol) 2,3-dihydroxy-7-sulphamoylbenzo[f]quinoxaline in 25 ml concentrated sulfuric acid was added at 0° C. 0,15 ml 100% nitric acid. Stirring was continued at 0° C. for 30 min, and then the mixture was poured into 100 ml ice-water to give a precipitate. The crude product was recrystallized (dimethylformamide-water) to give 0,7 g (61%) 2,3-dihydroxy-6-nitro-7-sulphamoyl-benzo[f]quinoxaline.

Provenance & Evidence