From Sodium Telluride and Acyl Chlorides

Sodium telluride, prepared from tellurium and sodium borohydride in aqueous medium, reacted with benzoyl chlorides using a phase transfer technique, to produce rather unstable 7e-benzyl tellurobenzoates (benzyl benzoyl telluriums) in low yields and not the expected dibenzoyl telluriums. Sodium telluride must reduce benzoyl groups to benzyl groups during these reactions. 

Te-4-methoxybenzyl 4-methoxytellurobenzoate Te-2-fluorohenzyl 2-ftuorotellurobenzoate Te-4-chlorobenzyl 4-chlorolellurobenzoate  

The Te-benzyl tellurobenzoates can be stored for several months in the dark at — 15°. The products of the reactions with benzoyl chloride were very unstable and could not be isolated . 

When sodium telluride is reacted under these conditions with 2-(chloroalkyl)-benzoyl chloride or with (2-bromomethylphenyl)-acetyl chloride heterocyclic tellurium compounds are formed in moderate yields. 

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