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Article Dans Une Revue ARKIVOC - Online Journal of Organic Chemistry Année : 2019

Design of bis-NHC Ru-complexes featuring diarylmethylene N-substituents for olefin metathesis

Résumé

New ruthenium indenylidene complexes containing N-heterocyclic carbene (NHC) ligands were synthesized and evaluated in olefin metathesis. The presence of two symmetrical saturated NHCs featuring N-diarylmethylene fragments (R= H, OMe or F) led to robust ruthenium precatalysts with a good latency. A kinetic study was investigated showing that a thermal stimulus (>60 degrees C) is required to reach an efficient catalytic initiation. Interestingly, a slight electronic effect was observed depending on the presence of an electron-donating or -withdrawing group within the diarylmethylene moiety. These complexes showed good activity at 1 mol% of catalyst loading in selected ring-closing metathesis (RCM) and cross-metathesis (CM) transformations. [GRAPHICS] .

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Chimie
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Dates et versions

hal-02303421 , version 1 (09-07-2020)

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Idriss Curbet, Jennifer Morvan, Sophie Colombel-Rouen, Thierry Roisnel, Christophe Crévisy, et al.. Design of bis-NHC Ru-complexes featuring diarylmethylene N-substituents for olefin metathesis. ARKIVOC - Online Journal of Organic Chemistry, 2019, 2019 (4), pp.102-112. ⟨10.24820/ark.5550190.p010.894⟩. ⟨hal-02303421⟩
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