New chiral phosphole ligands: their coordination behaviour and application in palladium-catalysed asymmetric allylic substitution

Autor: Frédéric Dallemer, Jean-Claude Daran, Maryse Gouygou, Gilbert G. A. Balavoine, Jérôme Hydrio
Rok vydání: 2002
Předmět:
Zdroj: Tetrahedron: Asymmetry. 13:1097-1102
ISSN: 0957-4166
Popis: New chiral 1-pyrrolidinophosphole ligands have been synthesised. These phospholes behave as monodentate ligands towards transition metal centres giving mononuclear disubstituted phosphole complexes of the type [M(phosphole) 2 Cl 2 ] with palladium(II) and platinum(II) precursors. In the palladium-catalysed asymmetric allylic substitution of 1,3-diphenyl-2-enylacetate with the anion of dimethylmalonate, the palladium and platinum complexes of these ligands proved to be efficient catalysts for the alkylation reaction, but provided only moderate enantioselectivities.
Databáze: OpenAIRE