Method for preparation of ruthenium-based metathesis catalysts with chelating alkylidene ligands
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.
WINDE ROLAND DR [DE]; WOERNER EILEEN [DE]; RIVAS-NASS ANDREAS DR [DE]; KARCH RALF DR [DE]; LEXER CHRISTINA [AT]; SLUGOVC CHRISTI
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