Condensed heterocycles with a thiazole ring. 6. New method for the preparation of imidazo[1,2-c]thiazolium and thiazolo[3,4-a]pyrimidinium salts
New derivatives of condensed heterocyclic systems with a thiazole ring, viz., thiazolo[3,4-a]pyrimidinium and imidazo[1,2-c]thiazolium salts, were obtained by the reaction of α-cyanobenzyl benzenesulfonate with N-[(methylthio)thiocarbonyl] amino acids. The structures of the synthesized compounds were proved by means of the IR and PMR spectral data.