Abstract The reactions of benzoylacetylene, propiolic acid, and methyl propiolate with 2, 4- dithiobiuret and 1-substituted and 1, 5-disubstituted 2, 4-dithiobiurets in glacial AcOH in the presence of HClO 4 or BF 3· Et 2 O were used to obtain 2-substituted 4-amino-6-imino-1, 3, 5-dithiazinium perchlorates or trifluoroborates, respectively.
