A series of new N-[(methylthio)thiocarbonylmethyl] azinium salts has been synthesized by reaction of carbon disulphide and methyl iodide with the corresponding phenacylazinium salt in a two-phase system followed by acid treatment of the ylide thus obtained. Condensation of dithioster derivatives with o-phenylenediamines gave N-(benzimidazolylmethyl) azinium salts in good yields.
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Bevk et al. (1989) studied this question.