The present invention refers to novel ruthenium- and osmium-based catalysts for olefin metathesis reactions, particularly to catalysts having stereoselective properties. Z-selectivity is obtained by utilising two monoanionic ligands of very different steric requirement. In olefin metathesis reactions these catalysts selectively provide the Z-isomer of disubstituted olefinic products.
本发明涉及用于烯烃交换反应的新型
钌和
锇基催化剂,特别是具有立体选择性特性的催化剂。通过利用两种具有非常不同立体要求的单阴离子
配体来获得Z-选择性。在烯烃交换反应中,这些催化剂可以选择性地提供二取代烯烃产物的Z异构体。