From organotellurolate anions and activated vinylic halides

5 From organotellurolate anions and activated vinylic halides 

Using TeLij, bis() -acylvinyl) tellurides have been prepared by a similar protocol. 

Similar substitutions at activated vinylchlorides have been performed using aluminium tellurolates.  

This protocol has been applied to the coupling of arene tellurolates with ( )-2-iodo-l-alkenyl sulphones, enolphosphonates, tosilates and triflates of )S-dicarbonyl compounds. 

General procedure for the substitution reactions between activated enols and lithium n-butyltellurolates. To a suspension of elemental tellurium (0.38 g, 3 mmol) in THF (4 mL) under nitrogen at 0°C was slowly added n-butyllithium (from a 1.4 M solution in hexane, 2.1 mL, 3 mmol). A clear yellow solution was formed. Then the appropriate enol 

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