Patent ID: 8586742

Claim:
A ruthenium catalyst represented by the structure of formula A: wherein L 1 and L 2 are each independently selected from the group consisting of phosphine (PR a R b ), amine (NR a R b ), imine, sulfide (SR), thiol (SH), sulfoxide (S(═O)R), heteroaryl containing at least one heteroatom selected from nitrogen and sulfur; arsine (AsR a R b ), stibine (SbR a R b ) and a N-heterocyclic carbene represented by the structures: L 3 is a mono-dentate two-electron donor selected from the group consisting of CO, PR a R b R c , NO + , AsR a R b R c , SbR a R b R c , SR a R b , nitrile (RCN), isonitrile (RNC), N 2 , PF 3 , CS, heteroaryl and tetrahydrothiophene; R 1 and R 2 are either each hydrogen or together with the carbons to which they are attached represent a phenyl ring which is fused to the quinolinyl moiety so as to form an acridinyl moiety; R, R a , R b , R c , R 3 , R 4 and R 5 are each independently alkyl, cycloalkyl, aryl, heterocyclyl, heteroaryl, alkylcycloalkyl, alkylaryl, alkylheterocyclyl or alkylheteroaryl; Y is halogen, OCOR, OCOCF 3 , OSO 2 R, OSO 2 CF 3 , CN, OH, OR, NR 2 , NH 3 , NR 3 , R 2 NSO 2 R, or a neutral solvent molecule, wherein R is as defined above; and X represents one, two, three, four, five, six or seven substituents positioned at any carbon atom on the acridinyl moiety; or one, two, three, four or five substituents positioned on any carbon atom on the quinolinyl moiety, and is selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, heterocyclyl, heteroaryl, alkylcycloalkyl, alkylaryl, alkylheterocyclyl, alkylheteroaryl, halogen, nitro, amide, ester, cyano, alkoxy, alkylamino, arylamino, an inorganic support and a polymeric moiety.