5-Thiols are prepared from 4-substituted 1,2-dithiole-3-thiones (I) by the action of sulphur and dimethylamine in hot dimethylformamide or dimethylsulphoxide, or by the action of sodium polysulphide in aqueous alcohols. Some properties of the 5-thiols are described.
J. P. Brown, J. Chem. Soc. C, 1968, 1077 DOI: 10.1039/J39680001077
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