Advances in design of ruthenium aryloxide catalysts for olefin metathesis are described. The target complexes are accessible on reaction of RuCl2(NHC)(py)2 (CHPh) (NHC – N-heterocyclic carbene) with electron-deficient, monodentate aryl- oxides, or aryloxides that yield small, rigid chelate rings. The best of these catalysts offer activity comparable to or greater than that of the parent chloride (Grubbs) systems in ring-closing metathesis (RCM). Preliminary studies of the electronic nature of the Ru–X bond suggest that the metal center is more electropositive in the aryloxide complexes than in the Grubbs systems.
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Monfette, S., Blacquiere, J.M., Conrad, J.C., Beach, N.J., Fogg, D.E. (2007). Ruthenium–Aryloxide Catalysts for Olefin Metathesis. In: Imamoglu, Y., Dragutan, V., Karabulut, S. (eds) Metathesis Chemistry. NATO Science Series, vol 243. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6091-5_4
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