Schiff base derivatives of ruthenium and osmium olefin metathesis
catalysts
    23.
    发明授权
    Schiff base derivatives of ruthenium and osmium olefin metathesis catalysts 有权
    钌基钌碱衍生物和锇烯烃复分解催化剂

    公开(公告)号:US5977393A

    公开(公告)日:1999-11-02

    申请号:US192175

    申请日:1998-11-12

    CPC分类号: C07F15/0046 C07F15/002

    摘要: The present invention generally relates to ruthenium and osmium carbene catalysts for use in olefin metathesis reactions. More particularly, the present invention relates to Schiff base derivatives of ruthenium and osmium carbene catalysts and methods for making the same. The inventive catalysts are generally prepared by the treatment of unmodified catalysts with the salts of the desired Schiff base ligands, in which an anionic and a neutral electron donating ligands of the unmodified catalysts are simultaneously replaced. The Schiff base derivatives of the ruthenium and osmium carbene catalysts show unexpectedly improved thermal stability while maintaining high metathesis activity, even in polar protic solvents. Although the inventive catalysts may be used in all metathesis reactions, use of these catalysts for ring-closing metathesis ("RCM") reactions is particularly preferred.

    摘要翻译: 本发明一般涉及用于烯烃复分解反应的钌和锇卡宾催化剂。 更具体地说,本发明涉及钌和咔卡因催化剂的席夫碱衍生物及其制备方法。 本发明的催化剂通常通过用所需希夫碱配体的盐处理未改性的催化剂来制备,其中未改性的催化剂的阴离子和中性给电子配体被同时替代。 钌和锇卡宾催化剂的席夫碱衍生物即使在极性质子溶剂中也能保持高的复分解活性,而且意外地改善了热稳定性。 尽管本发明的催化剂可用于所有复分解反应,但是特别优选使用这些催化剂进行闭环复分解(“RCM”)反应。