Dithienyl ditelluride

By treatment with NaBH4 in aqueous NaOH in the presence of dithienyl ditelluride, a-phenylseleno carboxylic esters and malonates, as well as a-phenylseleno carboxylic acids, are deselenylated to the corresponding seleno-lree acids in good yields. The selective removal of the seleno group without dealkylation of the ester moiety is achieved by the methods depicted in the scheme. 

The reaction of dithienyl ditelluride with Pt(PPh3)4 in GH2CI2 yields the chloro(thienyl)platinum(ii) complex 219, and a trinuclear Pt complex whose metal centers are bridged by two telluride ligands (220, Equation (57)). Activation of the Te-Te and G-Te bonds takes place during the reaction. 

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See also in sourсe #XX -- [ ]

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