Abstract

Diene-dienophile-functionalized Fischer-type carbene complexes containing 2-furfurylamino(2-propenyl)carbene ligands have been prepared from hexacarbonyl tungsten and tricarbonyl(methylcyclopentadienyl)manganese. These complexes are distinctly more reactive towards intramolecular Diels-Alder reactions than their acrylic amide congeners. Their reactivity increases with the electron acceptor capacity of the coligand metal fragment and with increasing steric bulk of the amino group.

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