1-Aminoamidino-4-aroyl (thiosemicarbazides) are produced in high yield from equimolar proportions of aroyl isothiocyanates and NN′-diaminoguanidine salts in aqueous methanol. They are bases and form hydrazones. Both the adducts and their hydrazones are ring-closed by alkali to 3-aryl-5-mercapto-1, 2, 4-triazoles. The cyclisation of 1- aminoamidino-4-aroyl (thiosemicarbazides) by acids affords, with loss of ammonia or ...
