HCID 178514504, compound → HCID 178526301, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1 g (3,5 mmol) 6-azido-7-chloro-2,3-dihydroxy-5-nitroquinoxaline and 15 ml xylene was refluxed for 3 h. After cooling to 25° C. the precipitate was filtered off and washed with toluene and ether to give 0,86 g (96%) 4-chloro-7,8-dihydroxy-1,2,5-oxadiazolo(3,4-f)quinoxaline-1-oxide, m.p.>300° C. NMR (DMSO-d6) 12.6 (1H, broad s), 12.0 (1H, broad s), 7.10 (1H,s).

Provenance & Evidence