Patent ID: 8846938

Claim:
Method for the preparation of a ruthenium-based carbine catalyst with a chelating alkylidene ligand comprising the reaction of a ruthenium (II)-alkylidene complex with an olefin derivative according to the equation: wherein L is a saturated H2IMes (=1,3-dimedityl-imidazolidine-2-ylidene) or unsaturated IMes (=1,3-dimesityl-imidazole-2-ylidene) ligand, X 1 and X 2 are, independently from each other, inorganic or organic anionic ligands, selected from halide anions, pseudohalide anions, hydroxides, acetates, trifluoracetates, or carboxylates, Y 1 and Y 2 are, independently from each other, hydrogen, C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 1 -C 6 -alkylthio, aryl, arylthio, C 1 -C 6 -alkylsulfonyl or C 1 -C 6 -alkylsulfinyl,or Y 1 and Y 2 are taken together to form a ring of the indenylidene type according to the formula wherein in said formula R 3 is hydrogen or a substituted or unsubstituted aryl group, Py is a substituted or unsubstituted pyridine ligand, R 0 and R 1 are, independently from each other, hydrogen, C 1 -C 10 -alkenyl, C 2 -C 10 -alkynyl, or a substituted or unsubstituted aryl group, a, b, c and d are, independently from each other, hydrogen, C 1 -C 10 -alkenyl, C 2 -C 10 -alkynyl, or aryl group, or an electron withdrawing group (“EWG”), with the provision that two of a, b, c or d can form a ring, Z is a heterodonor atom selected from the group consisting of oxygen, sulphur, and nitrogen, or a group comprising a heterodonor atom, R 2 is a substituted or unsubstituted hydrocarbon group selected from alkyl, alkenyl, alkynyl, aryl, alkylamino, alkylthio, a hydrocarbon containing a keto group or a hydrocarbon containing an ester group and wherein R 2 and/or Z with d may form a quinolone, a quinoxaline or an indol ring system.