Abstract
Carbon disulphide and methyl iodide converted the anhydrobases (3) into 8-[(methylthio)thiocarbonyl]pyridinium iodides (4) which afforded new pyridinium anhydrobases (5) with ethoxide. These anhydrobases rearranged into the isomeric ketene S,S-dithioacetals (6), precursors for disulphides.
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