Treatment of 1-butyltelluro-4-phenyl-1-buten-3-yne (3) with an aqueous solution of formic acid
results
in formation of the unexpected 2-phenyl-3-(4-phenylbut-3-yn-1-enyltelluro)tellurophene 5. Formation of the
expected α,β-unsaturated ketone β-telluro-substituted
4
was not observed by the reaction of 3 under
Rupe
reaction conditions. The structure of the product obtained was confirmed by X-ray diffraction of the dichlorotelluro derivative 6.
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