中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-Phenyl-1,2,4-dithiazol-3-on | 7047-10-1 | C8H5NOS2 | 195.266 |
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, 1,3-dithiole derivatives are obtained.
1,2-Dithiole-3-thiones and 1,2,4-dithiazole-3-thiones react with dibenzoylacetylene to provide thioacylmethylene or thioacylimino-1,3-dithiole adducts respectively. Some of these, on sulfurization, provide thieno[3,4d]-1,3-dithiole derivatives, but in others a retro-1,3-dipolar reaction predominates. Further reaction of the initial adducts with more dibenzoylacetylene provides spiran compounds.