Diarylthallium compounds

The 1,1-dimetallic compounds, R2C(SnMe3)ZnBr, were oxidized by dry air at —10 to 0°C in the presence of Me3SiCl to give aldehydes or ketones, R2C=0. In a related indirect method, arylthallium bis(trifluoroacetates) (prepared by 12-21) can be converted to phenols by treatment with lead tetraacetate followed by triphenylphosphine, and then dilute NaOH. Diarylthallium trifluoroacetates undergo the same reaction. ... 

This phenol synthesis complements the analogous reaction (see below) from arylthallium ditrifluoroacetates (147). Although yields are only moderate, the procedure represents a viable conversion of aryl Grignard reagents to phenols. It is a practical method, however, only when the diarylthallium trifluoroacetate precursor is formed via the Grignard route the alternative synthesis via symmetrization of arylthallium ditrifluoroacetates is obviously circuitous, since the latter compounds may be converted directly to phenols. 

R3T1 compounds, eg, methyl [3003-15A], ethyl [687-82-1], isobutyl [3016-08-8], and phenyl [30034)4-1] thallium(III), are usually prepared by the reaction between a dialkyl or diarylthallium halide and an oiganolithium reagent in ether (16) ... 

Diorganothallinm compounds are known to undergo disproportionation and alkyl-exchange reactions, as shown in equations (20) and (21). Dialkyl- and diarylthallium carboxy-lates react with mercmy acetate to give monoorganothallium dicarboxylates (equation 22). ... 

A series of organogold compounds can be made starting from anionic Au(I) complexes and reacting these with diarylthallium bromides ... 

C2H500CCgH4. The products compounds can be isolated as the diarylthallium chlorides. The yield of PhjTlCl is 10-20% the other yields are <10%. ... 

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