Synthesis and reactions of 3-aminothiazolidine-2-thion-4-one derivatives. 3. Reaction of 3-[N-(α-methylthio)ethylidene] aminothiazolidine-2-thion-4-one with amines

It is shown that recyclization leading to the formation of 1,3,4-thiadiazole derivatives occurs in the reaction of 3-[N-(-methylthio)ethylidene]aminothiazolidine-2-thion-4-one with amines. The structures of the compounds obtained were established by spectral methods and were confirmed by alternative synthesis.See [1] for Communication 2.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 339–342, March, 1981.