The invention relates to ruthenium alkylidene complexes having an N-heterocyclic carbene ligand comprising a 5-membered heterocyclic ring having a carbenic carbon atom and at least one nitrogen atom contained within the 5-membered heterocyclic ring, wherein the nitrogen atom is directly attached to the carbenic carbon atom and is substituted by a phenyl ring, and wherein the phenyl ring has a hydrogen at either or both ortho positions and is substituted at at least one ortho or meta position. The invention also relates to an olefin metathesis reactions and particularly to the preparation of tetra-substituted cyclic olefins via a ring-closing metathesis.
本发明涉及一种具有N-杂环卡宾
配体的
钌烯烃配合物,其中该
配体包含一个5元杂环环,该环具有一个卡宾
烯碳原子和至少一个
氮原子,所述
氮原子直接连接在卡宾
烯碳原子上,并被
苯环取代,所述
苯环在其两个邻位上具有
氢原子,并在至少一个邻位或间位上被取代。本发明还涉及
烯烃交换反应,特别是通过环闭合
烯烃交换反应制备四取代环状
烯烃。