Ruthenium-based complexes containing a benzimidazolium tag covalently connected to N-heterocyclic carbene ligands: environmentally friendly catalysts for olefin metathesis transformations. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Dalton Transactions Année : 2013

Ruthenium-based complexes containing a benzimidazolium tag covalently connected to N-heterocyclic carbene ligands: environmentally friendly catalysts for olefin metathesis transformations.

Marek Klučiar
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Karol Grela
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Résumé

Two ruthenium-based pre-catalysts containing an ionic tag covalently connected to a N-heterocyclic carbene (NHC) ligand are reported. These novel complexes, bearing a polar benzimidazolium group, are air-stable and can be easily prepared from commercially available reagents. The quaternary benzimidazolium tag allows the efficient separation of ruthenium waste from the metathesis product after reaction. Application in several olefin metathesis transformations leads to desired products of high purity, which exhibit ruthenium contamination levels as low as 1 ppm after simple filtration through a pad of silica gel.

Domaines

Catalyse
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Dates et versions

hal-00881422 , version 1 (08-11-2013)

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Citer

Marek Klučiar, Karol Grela, Marc Mauduit. Ruthenium-based complexes containing a benzimidazolium tag covalently connected to N-heterocyclic carbene ligands: environmentally friendly catalysts for olefin metathesis transformations.. Dalton Transactions, 2013, 42 (20), pp.7354-8. ⟨10.1039/c2dt32856a⟩. ⟨hal-00881422⟩
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