CHELATING CARBENE LIGAND PRECURSORS AND THEIR USE IN THE SYNTHESIS OF METATHESIS CATALYSTS
    3.
    发明申请
    CHELATING CARBENE LIGAND PRECURSORS AND THEIR USE IN THE SYNTHESIS OF METATHESIS CATALYSTS 审中-公开
    卡特彼勒前驱剂及其在合成催化剂合成中的应用

    公开(公告)号:US20080108841A1

    公开(公告)日:2008-05-08

    申请号:US11853598

    申请日:2007-09-11

    IPC分类号: C07F15/00

    摘要: Chelating ligand precursors for the preparation of olefin metathesis catalysts are disclosed. The resulting catalysts are air stable monomeric species capable of promoting various metathesis reactions efficiently, which can be recovered from the reaction mixture and reused. Internal olefin compounds, specifically beta-substituted styrenes, are used as ligand precursors. Compared to terminal olefin compounds such as unsubstituted styrenes, the beta-substituted styrenes are easier and less costly to prepare, and more stable since they are less prone to spontaneous polymerization. Methods of preparing chelating-carbene metathesis catalysts without the use of CuCl are disclosed. This eliminates the need for CuCl by replacing it with organic acids, mineral acids, mild oxidants or even water, resulting in high yields of Hoveyda-type metathesis catalysts. The invention provides an efficient method for preparing chelating-carbene metathesis catalysts by reacting a suitable ruthenium complex in high concentrations of the ligand precursors followed by crystallization from an organic solvent.

    摘要翻译: 公开了用于制备烯烃复分解催化剂的螯合配体前体。 所得催化剂是能够有效促进各种复分解反应的空气稳定的单体物质,其可以从反应混合物中回收并重复使用。 使用内部烯烃化合物,特别是β-取代的苯乙烯作为配体前体。 与末端烯烃化合物如未取代的苯乙烯相比,β-取代的苯乙烯更容易制备成本更低,更稳定,因为它们不易于自发聚合。 公开了不使用CuCl制备螯合 - 碳烯复分解催化剂的方法。 这通过用有机酸,无机酸,温和氧化剂甚至水代替它来消除对CuCl的需要,导致Hoveyda型复分解催化剂的高产率。 本发明提供了一种制备螯合碳烯复分解催化剂的有效方法,该方法是通过在高浓度配体前体中合适的钌络合物,然后从有机溶剂中结晶而制备。