D. Clarke et al., A NOVEL ENTRY TO THE IMIDOYLKETENE OXOKETENIMINE ENERGY SURFACE, Journal of the Chemical Society, Chemical Communications, (12), 1993, pp. 1026-1027
Gas-phase pyrolysis of the 1,2,3-triazoles 3-6 gives the pyrazolopyrim
idinones 11-13 and the quinolinone 14 respectively: the mechanism invo
lves an oxoketenimine-imidoylketene rearrangement.