ABSTRACT
It is interesting to note that the electrochemical oxidation of 2-thioxantine also forms products containing the S-S linkage, but the oxidation of the purine ring precedes the oxidation of the mercapto group [225]:
(106)
The electrooxidation of triphenylphosphine sulfide and O,O,O-triethylphosphorotioate at a Pt electrode in anhydrous MeCN/Bu4NC1O4 [226] gives a dimeric dication [Eq. (107)), similar to the result for thiocarbonyl compounds [219].
