The reaction of 3-amino-5-trifluoromethyl[1,2,4]triazole with carbon disulfide or phenyl isothiocyanate followed by heterocyclization with haloketones, haloesters and hydrazonoyl halides has been utilized for the synthesis of the title compounds; chemical and spectroscopic evidence for the suggested structures of the new compounds and a sequence leading to their formation are discussed.