Thallium organic compounds alkyl derivatives

RTIX2 derivatives are covalent compounds, generally soluble in organic solvents. The aryl and vinyl derivatives are more stable than the corresponding alkyl compounds. This type of compound has been postulated to be an intermediate in many organic synthetic reactions involving thallium(III) species. 

Oxidation of easily enoUzable ketones such as alkyl aryl ketones affords either a-oxylated ketones or carboxyhc acid derivatives via oxythallation of the enol forms, the products depending on the kind of Tl(lll) salts and/or solvents employed (Scheme 9.24). Use of TTN usually induces aryl group migration leading to the formation of carboxyhc acids or their esters [26], making this oxidative transformation useful for organic synthesis (Schemes 9.25 [27], 9.26 [28], 9.27 [29] and 9.28 [30]). Use of TTA, thallium tosylate [ l l(OTs), ], thallium triflate [ l1(()Tf), ], and thallium mesylate [ l1(()Ms)j, on the other hand, produces -oxylated ketones which sometimes further react to give useful compounds (Schemes 9.29 [31], 9.30 [32], 9.31 [33], 9.32 [34] and 9.33 [35]). 

---