The invention relates to a method for preparation of ruthenium-based carbene catalysts with a chelating alkylidene ligand (“Hoveyda-type catalysts”) by reacting a penta-coordinated ruthenium (II)-alkylidene complex of the type (L) (Py)X
1
X
2
Ru(alkylidene) with a suitable olefin derivative in a cross metathesis reaction. The method delivers high yields and is conducted preferably in aromatic hydrocarbon solvents. The use of phosphine-containing Ru carbene complexes as starting materials can be avoided. Catalyst products with high purity, particularly with low Cu content, can be obtained.
本发明涉及一种制备基于
钌的螯合烷基
配体(“Hoveyda型催化剂”)的方法,通过将一种五配位
钌(II)-烷基烯配合物(L)(Py)X1X2Ru(烷基烯)与适当的烯烃衍
生物在交叉重排反应中反应。该方法提供高产率,并且最好在
芳香烃溶剂中进行。可以避免使用含膦基
钌烷基配合物作为起始材料。可以获得高纯度的催化剂产品,特别是低
铜含量的催化剂产品。