Synthesis of Rh(I) and Ir(I) complexes with chiral C2-multitopic ligands: Structural and catalytic properties |
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| Affiliation: | 1. Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain;2. Instituto de Quı́mica Orgánica, CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain;1. Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia;2. Department of Natural Science, National Research University – Novosibirsk State University, Novosibirsk, 630090, Russia;3. Department of Chemistry, Moscow State University, Moscow, 119992, Russia;1. Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China;2. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;1. Muhlenberg College, 2400 Chew St., Allentown, PA 18104, USA;2. Colgate University, 13 Oak Dr., Hamilton, NY 13346, USA;3. Bucknell University, 701 Moore Ave, Lewisburg, PA 17837, USA;4. The College of William and Mary, 200 Stadium Dr., Williamsburg, VA 23186, USA;5. The University of Virginia, Charlottesville, VA 22904, USA |
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| Abstract: | Four multitopic ligands, N,N′-bis[(S)-prolyl)phenylenediamine, N,N′-bis{[(S)-pyrrolidin-2-yl]methyl}phenylenediamine, N,N′-bis[(S)-N-benzylprolyl]phenylenediamine, N,N′-bis{[(S)-N-benzyl-pyrrolidin-2-yl]methyl}phenylenediamine, were synthesised and their co-ordination properties with Rh(I) and Ir(I) studied. The complexes were prepared by the reaction of [MCl(cod)]2 with AgPF6 and further treatment with the ligand. All ligands form one to one [ML] species with the above metal ions. The structures of these complexes were elucidated by analytical and spectroscopic data (elemental analysis, mass spectroscopy, IR, 1H- and 13C-NMR). Complexes show excellent activities and enantioselectivities up to 30% for the hydrogenation of prochiral olefins under mild reaction conditions. |
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