G. Labbe et al., RING-OPENING DESULFURIZATION OF 1,2,3-THIADIAZOLIUM SALTS WITH N-NUCLEOPHILES, Journal of the Chemical Society. Perkin transactions. I, (17), 1995, pp. 2079-2081
The 1,2,3-thiadiazolium chlorides 4a,b react with benzylamine, aniline
, phenylhydrazine, hydroxylamine and N-methylhydroxylamine at low temp
erature to yield the 1-arylamino-1,4-diazadienes 5-9 which have been f
ully characterized by NMR spectroscopy.