Cross-metathesis reaction of functionalized and substituted olefins using group 8 transition metal carbene complexes as metathesis catalysts
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US09403854B2
公开(公告)日:2016-08-02
The invention pertains to the use of Group 8 transition metal carbene complexes as catalysts for olefin cross-metathesis reactions. In particular, ruthenium and osmium alkylidene complexes substituted with an N-heterocyclic carbene ligand are used to catalyze cross-metathesis reactions to provide a variety of substituted and functionalized olefins, including phosphonate-substituted olefins, directly halogenated olefins, 1,1,2-trisubstituted olefins, and quaternary allylic olefins. The invention further provides a method for creating functional diversity using the aforementioned complexes to catalyze cross-metathesis reactions of a first olefinic reactant, which may or may not be substituted with a functional group, with each of a plurality of different olefinic reactants, which may or may not be substituted with functional groups, to give a plurality of structurally distinct olefinic products. The methodology of the invention is also useful in facilitating the stereoselective synthesis of 1,2-disubstituted olefins in the cis configuration.
该发明涉及将8族过渡金属卡宾配合物用作烯烃交叉⽐特⽅反应的催化剂。具体地,使用取代有N-杂环卡宾配体的钌和锇烷基亚烯配合物来催化交叉⽐特⽅反应,从而提供各种取代和官能化的烯烃,包括磷酸酯取代的烯烃,直接卤代的烯烃,1,1,2-三取代的烯烃和季铵烯烃。该发明还提供了一种利用上述配合物催化第一烯烃反应物(可能带有或不带有官能团)与多种不同烯烃反应物(可能带有或不带有官能团)进行交叉⽐特⽅反应,从而得到多种结构不同的烯烃产物的方法。该发明的方法还有助于促进顺式构型的1,2-二取代烯烃的立体选择性合成。