Dethallation reaction

Other monovinylthallium(ni) compounds such as (132), the product of oxythallation of acetylenes, react analogously to the arylthallium compounds. Halogenodethallation and pseudohalogeno-dethallation reactions result from the interaction of the oxyalkenylthallium compound with either potassium iodide or with the appropriate copper derivatives. 6... 

The oxidation of L-(+)-ascorbic acid to its radical anion has been studied in the presence of AtaTlOH. The complexed radical anions are very stable, their half lives are several days long, and the e.s.r, spectra permit quantitative determination of L-(+)-ascorbic acid. Direct evidence has been found for the formation of alkyl radicals in bromo-dethallation reactions, a spin-trapping technique was used. ... 

Interestingly, cyclic products are not found in the 0-5 and 0-6 assisted oxythallation reactions perhaps because of rearrangements during the dethallation step. The finding of the tetrahydrofuran products (235) and (237) after dethallation of the oxidation products of l-buten-4-ol (234)... 

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