Ruthenium–Indenylidene Olefin Metathesis Catalyst with Enhanced Thermal Stability |
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| Authors: | Dr Anzhelika Kabro Dr Thierry Roisnel Dr Cédric Fischmeister Dr Christian Bruneau |
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| Institution: | 1. Sciences Chimiques de Rennes, Catalyse et Organométalliques, UMR 6226 CNRS Université de Rennes 1, Campus de Beaulieu, 263 Avenue du Général Leclerc, 35042 Rennes (France), Fax: (+33)?223236939;2. Centre de diffractométrie X, UMR 6226 CNRS Université de Rennes 1, Campus de Beaulieu, 263 Avenue du Général Leclerc, 5042 Rennes (France) |
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| Abstract: | Two new ruthenium complexes bearing a bidentate (κ2O,C)‐isopropoxy–indenylidene ligand and a PPh3 ( 9 ) or PCy3 ( 10 , Cy=cyclohexyl) ligand have been synthesized and fully characterized by 1H and 13C NMR spectroscopy and X‐ray crystallography. Complex 10 displays a very high thermal stability with a half life of six days at 110 °C in D8]toluene. Complex 10 was evaluated in various ring‐closing metathesis reactions and ring‐opening metathesis polymerization of dicyclopentadiene, in which it showed a latent behavior with low activity at room temperature and high activity upon thermal activation. |
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| Keywords: | indenylidene latent catalysts metathesis olefins ruthenium |
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