Activation of olefin metathesis complexes containing unsymmetrical unsaturated N-heterocyclic carbenes by copper and gold transmetalation

Abstract : The activation of ruthenium-indenylidene complexes containing two unsymmetrical unsaturated N-heterocyclic carbenes (u2-NHCs) by a transmetalation process is reported. The use of copper(i) or gold(i) chlorides promotes the rapid trapping of one NHC ligand, which releases the catalytically active Ru-species. Impressive initiation rates with full-conversions are observed within one minute. This practical protocol demonstrates excellent catalytic performances in various ring-closing metathesis (RCM) and self-metathesis (SM) reactions.
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Submitted on : Monday, October 7, 2019 - 11:31:27 AM
Last modification on : Tuesday, November 12, 2019 - 5:01:03 PM

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Fadwa Kamal, Sophie Colombel-Rouen, Adrien Dumas, Jean-Paul Guégan, Thierry Roisnel, et al.. Activation of olefin metathesis complexes containing unsymmetrical unsaturated N-heterocyclic carbenes by copper and gold transmetalation. Chemical Communications, Royal Society of Chemistry, 2019, 55 (77), pp.11583-11586. ⟨10.1039/c9cc05776e⟩. ⟨hal-02307034⟩

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