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

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• 作者：Hydrio ; Jé ; rô ; me ; Gouygou ; Maryse ; Dallemer ; Fré ; dé ; ric ; Daran ; Jean-Claude ; et. al.
• 刊名：Tetrahedron: Asymmetry
• 出版年：2002
• 出版时间：June 10, 2002
• 年：2002
• 卷：13
• 期：10
• 页码：1097-1102
• 全文大小：120 K

文摘

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)₂Cl₂] 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.