The Synthesis of New HetPHOX Ligands and Their Application to the Intermolecular Asymmetric Heck Reaction
作者:Martin O. Fitzpatrick、Helge Muller-Bunz、Patrick J. Guiry
DOI:10.1002/ejoc.200800761
日期:——
The synthesis of six members of the HetPHOX ligand class and the application of palladium complexes of these ligands to the intermolecular asymmetric Heck reaction is described. The tert-leucinol-derived ligands proved the most enantioselective, with palladium complexes of these ligands affording ee values of up to 96, 95 and 94 % in the phenylation, cyclohexenylation and naphthylation, respectively
描述了 HetPHOX 配体类的六个成员的合成以及这些配体的钯配合物在分子间不对称 Heck 反应中的应用。叔亮氨酸衍生的配体被证明是最具对映选择性的,这些配体的钯配合物在 2,3-二氢呋喃的苯基化、环己烯基化和萘基化中分别提供高达 96%、95% 和 94% 的 ee 值。作为对观察到的选择性的解释的辅助,制备了最具对映选择性配体的钯配合物并获得了X射线晶体结构。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)