Gi. Yranzo et al., Formation of cumulenes, triple-bonded, and related compounds by flash vacuum thermolysis of five-membered heterocycles, EUR J ORG C, (12), 2001, pp. 2209-2220
Flash vacuum thermolysis of a large variety of heterocyclic compounds is a
useful means of production of ketenes, ketenimines, thioketenes, allenes, i
minopropadienones, bis(imino)propadienes, iminopropadienethiones, carbodiim
ides, isothiocyanates, acetylenes, fulminic acid, nitrile imines and nitril
e ylides, nitriles, cyanamides, cyanates, and other compounds, often in pre
paratively useful yields.