Cross-metathesis reaction of functionalized and substituted olefins using group 8 transition metal carbene complexes as metathesis catalysts
申请人:——
公开号:US20030100776A1
公开(公告)日:2003-05-29
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.
本发明涉及使用第 8 族过渡金属碳烯配合物作为烯烃交叉金属化反应的催化剂。特别是,用 N-杂环碳烯配体取代的钌和锇亚烷基络合物可用于催化交叉甲基化反应,以提供各种取代的和功能化的烯烃,包括膦酸盐取代的烯烃、直接卤化的烯烃、1,1,2-三取代的烯烃和季烯丙基烯烃。本发明进一步提供了一种创造官能团多样性的方法,利用上述配合物催化第一种烯烃反应物(可以被官能团取代,也可以不被官能团取代)与多种不同的烯烃反应物(可以被官能团取代,也可以不被官能团取代)中的每一种反应物的交叉嵌合反应,得到多种结构不同的烯烃产物。本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。