New rearrangement of azofuroxans in an oxidising medium
Abstract
3,3'-(R)-Disubstituted 4,4'-azo-1,2,5-oxadiazole 2-oxides (furoxans) have been found to undergo a new rearrangement into 2-(furoxan-4-yl)-4-nitro-5-R-2H-1,2,3-triazole 1-oxides on heating in pertrifluoroacetic or peracetic acids.