Molecular Mechanics Predictions and Experimental Testing of Asymmetric Palladium-Catalyzed Allylation Reactions Using New Chiral Phenanthroline Ligands
作者:Eduardo Peña-Cabrera、Per-Ola Norrby、Magnus Sjögren、Aldo Vitagliano、Vincenzo De Felice、Johan Oslob、Shingo Ishii、David O'Neill、Björn Åkermark、Paul Helquist
DOI:10.1021/ja950860t
日期:1996.1.1
of a number of substituted phenanthrolines and their η3-allylpalladium complexes. Special attention was focused on phenanthrolines bearing chiral, terpene-derived, alkyl and alkenyl groups at C(2). Based upon these calculations, predictions could then be made regarding the suitability of the several ligands for use in asymmetric palladium-catalyzed substitution reactions of allylic acetates. Each of
分子力学计算用于探测许多取代菲咯啉及其 η3-烯丙基钯配合物的构象特性。特别关注在 C(2) 处带有手性、萜烯衍生、烷基和烯基的菲咯啉。基于这些计算,然后可以预测几种配体在不对称钯催化的乙酸烯丙酯取代反应中的适用性。每个取代的菲咯啉都是通过简单的方法制备的。在催化烯丙基化中使用这些配体得到的结果与基于计算的预测非常一致。预测了最高水平的不对称诱导,并使用现成的 2-(2-冰片基) 菲咯啉配体 13 获得。结果与先前报道的使用其他配体获得的数据进行了比较。总体而言,这项工作进一步表明了组合计算/实验的潜在效用……