Platinum(II) Complexes Featuring Chiral Diphosphines and N-Heterocyclic Carbene Ligands: Synthesis and Evaluation as Cycloisomerization Catalysts
| Autor: | Myriem Skander, Angela Marinetti, Delphine Brissy, Gilles Frison, Pascal Retailleau |
|---|---|
| Přispěvatelé: | Institut de Chimie des Substances Naturelles (ICSN), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Laboratoire des mécanismes réactionnels (DCMR), École polytechnique (X)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2008 |
| Předmět: |
[CHIM.ORGA]Chemical Sciences/Organic chemistry
010405 organic chemistry Ligand Stereochemistry Organic Chemistry chemistry.chemical_element [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences Oxidative addition Combinatorial chemistry 0104 chemical sciences Catalysis [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Inorganic Chemistry chemistry.chemical_compound Cycloisomerization chemistry Diphosphines [CHIM.COOR]Chemical Sciences/Coordination chemistry Physical and Theoretical Chemistry Platinum Carbene Derivative (chemistry) |
| Zdroj: | Organometallics Organometallics, American Chemical Society, 2009, 28 (1), pp.140-151. ⟨10.1021/om800743r⟩ |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om800743r |
| Popis: | International audience; Square-planar platinum(II) complexes that combine chiral diphosphines and NHC ligands have been obtained in high yields from (NHC)Pt(0)(dvtms) complexes, via an oxidative addition/ligand exchange sequence. The use of suitable carbene−diphosphine pairs allows axially chiral, configurationally stable platinum complexes to be isolated. The Pt(II) complexes have been evaluated as precatalysts for the cycloisomerization reaction of an allyl propargylamine derivative. Their catalytic properties have been examined as a function of structural variations on both the diphosphine and the NHC units. For axially chiral species possible epimerization pathways have been envisioned and the inversion barriers have been estimated through computational studies |
| Databáze: | OpenAIRE |
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