Organolead lithiums

See LITHIUM PERALKYLURANATES, TRIALKYLSILYLOXY ORGANOLEAD DERIVATIVES, ALKYLALUMINIUM DERIVATIVES See ARYLMETALS... 

The method most used for preparation of organolead compounds in the laboratory is treatment of lead(n) chloride with alkyl-, aryl-, or vinyl-Grignard or -lithium reagents, the main products being as shown in the following summary for magnesium 163,395 463 464... 

Aminolead compounds of the simplest types, R3PbNR2 with, e.g. R = Me, Et have recently been synthesized. Using the procedure which has been successful for the synthesis of aminotin compounds 126) these compounds were obtained without difficulty 152, 196) from lithium dialkylamides and organolead halogenides (Table XIII). 

Organolead hydrides. Dimethyl ether condensed in vacuo on a liq. Ng-cooled mixture of trimethyllead chloride and a slight excess of lithium aluminum hydride, the reaction initiated by warming to —78°, and the product isolated after a few min. at that temp. trimethyllead hydride. Y 95%. F. e. in lower yield s. W. E. Becker and S. E. Gox, Am. Soc. 82, 6264 (1960). 

Few organic lead-seleniiun compounds are known, but organolead selenolates such as (CH3)3PbSeR are known, as also are examples of the hexa-aryldilead selenides (R3Pb)2Se The lithium salts (C( Hs)3PbSeLi are formed in an interesting manner by the direct attack of selenium upon the lithium triaryl-lead. 

Organolead tellurides are very rare and appear to be currently restricted to [(C6H5)3Pb]2Te (m.p. 129°) and its lithium salt (C6Hs)3PbTeLi i . ... 

Metallation of the organolead halides by lithium, sodium or potassium yields the synthetically useful metal tri-organoleads, whose exact nature is presently not fully understood. 

The alkali metal tri-organoleads have been widely utilized as synthetic intermediates and their reactions are exemplified in the lithium organoleads. 

Insertion reactions into the lithium-lead bond has realized a useful source of organolead functional derivatives229. 

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