Method for preparation of ruthenium-based metathesis catalysts with chelating alkylidene ligands

US9562116B2 · kind B2 · utility

Assignees

• UMICORE AG & CO. KG · DE
• Graz University of Technology · AT

Inventors

• Roland Winde · Frankfurt, DE
• Angelino Doppiu · Seligenstadt, DE
• Eileen Woerner · Nidderau, DE
• Andreas Rivas-Nass · Schriesheim, DE
• Ralf Karch · Kleinostheim, DE
• Christian Slugovc · Graz, AT
• Christina Schinagl · Graz, AT

Key dates

• Filing date: Aug 28, 2014
• Grant date: Feb 7, 2017
• Expiry date: Sep 24, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/821
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.