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Heterogenization of a Modified Grubbs–Hoveyda Catalyst on a ROMP-Derived Monolithic Support

Authors

  • Jens O. Krause,

    1. Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
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  • Said H. Lubbad,

    1. Institut für Analytische Chemie und Radiochemie, Universität Innsbruck, Innrain 52 a, A-6020 Innsbruck, Austria
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  • Oskar Nuyken,

    Corresponding author
    1. Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany
    • Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstr. 4, D-85747 Garching, Germany. Fax: (+49) 89-289-13562
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  • Michael R. Buchmeiser

    Corresponding author
    1. Institut für Analytische Chemie und Radiochemie, Universität Innsbruck, Innrain 52 a, A-6020 Innsbruck, Austria
    • Institut für Analytische Chemie und Radiochemie, Universität Innsbruck, Innrain 52 a, A-6020 Innsbruck, Austria. Fax: (+43) 512-507-2677
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Abstract

A ring-opening metathesis polymerization- (ROMP-) based monolith was synthesized using a Grubbs' first generation catalyst. The living termini were used for surface grafting of norborn-5-ene-2-ylmethyl hexafluoroglutarate. The free carboxylic acid groups of the graft polymer were converted into the corresponding silver salt and reacted with the Grubbs–Hoveyda catalyst [RuCl2([DOUBLE BOND]CH[BOND](2-iPrO[BOND])C6H4)(IMesH2)] (IMesH2 = 1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene) to yield a stable heterogeneous version of this catalyst for use in ring-closing metathesis (RCM) under continuous flow conditions.

original image

The monolith-supported Grubbs–Hoveyda catalyst.

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