New chiral phosphole ligands: their coordination behaviour and application in palladium-catalysed asymmetric allylic substitution
作者:Jérôme Hydrio、Maryse Gouygou、Frédéric Dallemer、Jean-Claude Daran、Gilbert G.A. Balavoine
DOI:10.1016/s0957-4166(02)00256-2
日期:2002.6
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
合成了新的手性1-吡咯烷基磷酸配体。这些磷脂作为过渡金属中心的单齿配体,与钯(II)和铂(II)前体形成单核双取代的[M(phosphole)2 Cl 2 ]型单核磷脂配合物。在钯催化的用丙二酸二甲酯的阴离子对1,3-二苯基-2-烯基乙酸酯的不对称烯丙基取代中,这些配体的钯和铂络合物被证明是烷基化反应的有效催化剂,但仅提供了中等的对映选择性。