A Modular Approach to a New Class of Monodentate Chiral Phosphorus Ligands and Their Application in Enantioselective Copper-Catalysed Conjugate Additions of Diethylzinc to Cyclohexenone
作者:Chiara Monti、Cesare Gennari、Rebecca M. Steele、Umberto Piarulli
DOI:10.1002/ejoc.200400227
日期:2004.8
A new family of chiral phosphorus ligands (5) for use in enantioselective catalysis have been synthesised. The ligands contain the electron-poor bis(sulfonyl)diazaphospholidine moiety and possess a highly modular structure which is well suited to the synthesis of a library. A small library (23 members) of ligands 5 was prepared and tested in the enantioselective copper-catalysed conjugate addition
已经合成了用于对映选择性催化的一系列手性磷配体 (5)。配体含有缺电子的双(磺酰基)二氮杂磷脂部分,并具有高度模块化的结构,非常适合库的合成。在二乙基锌与环己烯酮的对映选择性铜催化共轭加成中制备并测试了配体 5 的小型文库(23 个成员)。在对映体过量 (ee) 高达 75% 的情况下获得了完全转化。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)