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. |