Trisubstituted vinyl tellurides

It was observed that the obtained telluroborane fails to react under the Suzuki coupling (Phl/Pd(PPh3)4/Na3P04/DMF) to give trisubstituted vinyl tellurides. 

Disubstituted vinylic tellurides are converted into trisubstituted olefins by a similar reaction catalysed by Ni(O). ... 

Vinylic tellurides (e.g., 183) are reacted with diethylzinc to give the corresponding vinylzincs, which are captured with H20 or D20 to give the detellurated olefin (e.g., 184) in variable isomeric ratios (Scheme 103).262 In one case, the intermediate vinylzinc was coupled with para-MeC6H4l under Pd(PPh3)4 catalysis, leading to the trisubstituted olefin 185 in 72% yield with retention of the double-bond geometry (Scheme 103).262... 

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