Patent ID: 7632772

Claim:
A composition comprising a recyclable ruthenium catalyst having a ligand chemically bonded to a support material and which is represented by formula IIIa, IIIb, or IIIc: wherein G is a support material selected from the group consisting of resins, polymers, PEGs, and silica gel, wherein the support material has amino, hydroxy, alkylthio, haloalkyl, or carboxylic group on the surface or terminal thereof; X 1 and X 2 are the same or different and each are electron-withdrawing anionic ligands, wherein X 1 and X 2 may be linked to each other via carbon-carbon and/or carbon-heteroatom bonds; Y is a neutral two-electron donor selected from the group consisting of oxygen, sulfur, nitrogen and phosphorus; R is H, halogen atom, alkyl, alkoxy, aryl, aryloxy, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, aryloxycarbonyl, heteroaryl, carboxyl, (RCO 2 —), cyano, nitro, amido, amino, aminosulfonyl, N-heteroarylsulfonyl, alkylsulfonyl, arylsulfonyl, alkylsulfinyl, arylsulfinyl, alkylthio, arylthio, or sulfonamido group; R 1 and R 2 are each H, Br, I, alkyl, alkoxy, aryl, aryloxy, alkylcarbonyl, alkoxycarbonyl, aryloxycarbonyl, carboxyl, amido, amino, heteroaryl, alkylthio, arylthio, or sulfonamido group; R 3 is an alkyl, aryl, heteroaryl, alkylcarbonyl, arylcarbonyl, thiocarbonyl, or aminocarbonyl group; EWG is an electron withdrawing group selected from the group consisting of aminosulfonyl, amidosulfonyl, N-heteroarylsulfonyl, arylsulfonyl, arylsulfinyl, arylcarbonyl, alkylcarbonyl, aryloxycarbonyl, aminocarbonyl, amido, sulfonamido, chloro, fluoro, and haloalkyl group; and L is an electron donating ligand, which may be linked to X 1 via carbon-carbon and/or carbon-heteroatom bonds.