A multivalent PyBox asterisk ligand |
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Authors: | Catherine Aubert Marc Gingras |
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Affiliation: | UPR CNRS 3118 Interdisciplinary Center on Nanoscience of Marseille (CINaM), Campus de Luminy, Université de la Méditerranée, 163 Avenue de Luminy, Case 913, 13288 Marseille Cedex 9, France |
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Abstract: | A discrete multivalent PyBox ligand was investigated. An efficient synthesis and the properties of 1 are reported (UV-visible, cyclic voltammetry, NMR, MALDI-Tof). It incorporates a sulfur-rich persulfurated benzene core which was compatible with a metal-catalyzed reaction in spite of donating and oxidizable sulfur atoms. Metal-catalysis with a persulfurated aromatic ligand was demonstrated for the first time in a model reaction: the Rh-enantioselective hydrosilylation of acetophenone. The interesting features were the reactivity and the enantiocatalytic behavior while varying the metal content. This work promotes new thoughts toward chiral supramolecular assemblies or metal nanoparticles stabilized with chiral multivalent ligands. |
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Keywords: | Dendrimers PyBox Multivalent ligand Sulfur Rhodium Asymmetric catalysis Hydrosilylation Cyclic voltammetry |
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