Thallium i -based Catalysts

Based on the classic mechanism for the Suzuki crosscoupling, two equivalents of base are necessary to promote the transformation 

Since an aqueous solution of thallium(i) hydroxide is air and light sensitive, and there are limited commercial sources of this reagent, its replacement by thallium(i) ethoxide seems to be an excellent alternative to accelerate palladium(0)-catalysed crosscouplings. Although toxic, thallium(i) ethoxide is an easily handled liquid, more stable and readily available from several commercial sources.  

Thallium benzoate can be used as a catalyst in the oxidation of all l aromatic compounds by oxygen/air mixtures. A couple of alkyl aromatic 

Pd(PPh3)4 (3 mol%) (after Jones oxidation) TI2CO3 (1.5 equiv.) pj, 

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