5-Aryl-1, 2, 4-dithiazole-3-thiones may be made by sulfurization of N-aroyl-isothiocyanates,- thionocarbamates, or-dithiocarbamates. Attempts to produce 5-alkyl compounds failed, whereas an alternate cyclization of a reaction intermediate produced a 1, 3-thiazine from cinnamoyl isothiocyanate. The mechanisms of the reactions are discussed briefly. The thiones readily form adducts with methyl iodide and reactive acetylenes. In the latter case, ...
