Ruthenium carbonyl compounds containing polypyridine ligands as catalysts in the reaction of N-benzylideneaniline hydrogenation
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The synthesis and characterization of ruthenium complexes containing polypyridine ligands: Ru(dppz)(PPh 3) 2Cl 2, Ru(bpy)(PPh 3) 2Cl 2, Ru(phen)(PPh 3) 2Cl 2, Ru(dppz-Cl)(PPh 3) 2Cl 2, Ru(phen)(CO) 2Cl 2, Ru(bpy)(CO) 2Cl 2 and Ru(dppz)(CO) 2Cl 2 (where dppz: dipyrido[3,2-a:2′,3′-c]phenazine, dppz-Cl: 10-chlororodypirido[3,2-a:2′,3′-c]phenazine, phen: 1,10-phenanthroline and bipy: 2,2′-bipyridine) are reported. The ruthenium complexes show high activity as catalysts in the hydrogenation reaction of N-benzylideneaniline and the hydrogen transfer reaction. The products of the catalysis were obtained with conversions between 21 and 91% after 2 h of reaction. The Ru(phen)(CO) 2Cl 2 complex was the catalyst that showed the highest conversion (91%) for the hydrogenation of N-benzylideneaniline. The complexes Ru(dppz)(PPh 3) 2Cl 2, Ru(bpy)(PPh 3) 2Cl 2 and Ru(dppz)(CO) 2Cl 2 showed 99% conversion in the hydrogen transfer reaction. © 2012 Elsevier B.V. All rights reserved.
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