Ao. Abdelhamid et al., Reactions with hydrazonoyl halides. Part XXV. Synthesis of some new 2,3-dihydro-1,3,4-thiadiazoles and 5-arylazothiazoles, J CHEM R-S, (9), 1999, pp. 532-533A
2,3-Dihydro-1,3,4-thiadiazoles are synthesized by the reaction of hydrazono
yl halides with alkyl benzoylhydrazinecarbodithioates in ethanolic triethyl
amine whereas alpha-keto hydrazonoyl halides react with benzoylthiosemicarb
azides to afford 5-arylazothiazoles.