Umicore Ag & Co Kg

Graz University of Technology

Christina Schinagl

Ralf Karch

Angelino Doppiu

Eileen Woerner

Andreas Rivas-Nass

Roland Winde

Christian Slugovc

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)X1X2Ru(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.

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)XXRu(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.

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Kalsdorf, Austria

Christina Schinagl