Umicore Ag & Co Kg

Francis Walter Cornelius Verpoort

Stijn Frans Monsaert

The invention relates to a method for preparation of ruthenium-based carbene catalysts with chelating alkylidene ligands (so-called 'Hoveyda-type catalysts') in a cross metathesis reaction by reacting a ruthenium-alkylidene complex with an olefin derivate in the presence of a polymer-supported cation-exchange resin (PSR) acting as a ligand (i.e. phosphine or amine) scavenger. Preferably, penta-coordinated ruthenium benzylidene or indenylidene carbene complexes are employed. The polymer-supported cation-exchange resin (PSR) may be an acidic resin (comprising sulfonic acid or carboxylic groups) or a resin containing carboxylic acid chloride (&#x2014;COCl) groups or sulfonyl chloride (&#x2014;SOCl) groups. The process is versatile and environmentally friendly; high yields are obtained.

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Oekene, Belgium

Francis Walter Cornelius Verpoort