In order to do this, we prepared 3-hydrazinopyrazine 1-oxide (7) and reacted it with the cyclizing agent 2 used in the previously described reaction. In this instance, cyclization is possible in only one direction to afford compound 8 or its Dimroth rearrangement product 9 (Scheme 11). The compound obtained from this reaction did indeed have the correct elemental formula, C5H4N40, expected for either compound 8 or 9. The mass spectrum, ...
![7-oxido-[1,2,4]triazolo[3,4-c][1,2,4]triazin-7-ium Structure](https://image.chemsrc.com/caspic/200/75431-21-9.png)