Abstract
The reaction of thiosemicarbazides 1a-h with hydrazonoyl chlorides 2a-g at ambient temperature, in the presence of triethylamine yielded, in each case, two products. The structure of these compounds was confirmed as 1,3,4-oxadiazoles 14a-h and hydrazonothioates 15a-g. The structure of 15b was confirmed through single crystal X-ray diffraction. A mechanism was proposed for this cyclodesulfurization reaction.