C2 -Symmetric atropisomeric N-heterocyclic carbene–palladium( ii ) complexes: synthesis, chiral resolution, and application in the enantioselective α-arylation of amides
| Autor: | Lingyu Kong, Yajie Chou, Muriel ALBALAT, Marion Jean, Nicolas Vanthuyne, Paola Nava, Stéphane Humbel, Hervé Clavier |
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| Přispěvatelé: | Institut des Sciences Moléculaires de Marseille (ISM2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-20-CE07-0030,cResolu,Accès direct à des complexes chiraux NHC-métal de transition : de nouvelles opportunités pour la catalyse asymétrique(2020) |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Dalton Transactions Dalton Transactions, 2023, 52 (25), pp.8728-8736. ⟨10.1039/d3dt01182h⟩ |
| ISSN: | 1477-9226 1477-9234 |
| Popis: | International audience; The concept of atropisomeric N-heterocyclic carbene (NHC)–metal complexes was extended to NHCs possessing a C2-symmetry and implemented to prepare palladium-based complexes. An in-depth study of the NHC precursors and the screening of various NHC ligands enabled us to circumvent the issue associated with the formation of meso complexes. A set of 8 atropisomeric NHC–palladium complexes were prepared and then obtained with high enantiopurities, thanks to an efficient resolution by chiral HPLC at the preparative scale. These complexes displayed good activity in the intramolecular α-arylation of amides and various cyclic products were isolated with excellent enantioselectivities (up to 98% ee). |
| Databáze: | OpenAIRE |
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