Sodium tellurolates

The reaction proceeds via a single electron transfer (SET) from sodium tellurolate to perfluoroalkyl halides followed by a radical chain reaction of the SRN mechanism. 

The reduction of ditellurium compounds with sodium borohydride is suitable for the generation of sodium tellurolates derived from carbohydrates4. 

Tabic 2 Sodium Tellurolates from Diorgano Ditellurium Compounds and Sodium Boro-... 

These reductions were carried out in the presence of an alkyl halide that reacted with the sodium tellurolate. The expected unsymmetrical diorgano tellurium derivatives were isolated. 

Copper(I) chloride and sodium tellurolates produced polymeric copper(I) tellurolates1. 

Copper(I) alkanetellurolates and arenetellurolates were prepared from the sodium tellurolates or triphenylstannyl organo tellurium compounds and copper(I) chloride. The copper tellurolates are extremely insoluble, polymeric red-brown solids. 

The organotelluro group is introduced into the steroid molecule by reacting sodium tellurolates with halosteroids or />- to I uen e s u I fonates of steroids. Generally, the products were purified by chromatography. The pure compounds should be stored in the dark at low temperatures. The tellurolates were obtained by reduction of the di telluriums with sodium borohydride. 

Sodium 1-methylethanetellurolate and hexadecanetellurolate were obtained from sodium hydrogen telluride and the appropriate alkyl halide in THF or THF/ethanol. The sodium hydrogen telluride was prepared from tellurium and sodium borohydride in water. Equimolar amounts of disodium telluride combined with aliphatic carboxylic acid chlorides in tetrahydrofuran at — 30" and with aromatic carboxylic acid chlorides in tetrahydrofuran at 0° to give sodium tellurolates that have an acyl group bonded to the tellurium atom. These tellurolates, the sodium salts of tellurolocarboxylic acids, are dark-red substances that were obtained in almost quantitative yields. 

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