Synthesis of Chiral Biphenol-Based Diphosphonite Ligands and Their Application in Palladium-Catalyzed Intermolecular Asymmetric Allylic Amination Reactions
作者:Ce Shi、Chih-Wei Chien、Iwao Ojima
DOI:10.1002/asia.201000697
日期:2011.2.1
library of new 2,2′‐bis(diphenylphosphinoyloxy)‐1,1′‐binaphthyl (binapo)‐type chiral diphosphonite ligands was designed and synthesized based on chiral 3,3′,5,5′,6,6′‐hexasubstituted biphenols. These bop ligands have exhibited excellent efficiency in a palladium‐catalyzed intermolecular allylic amination reaction, which provides a key intermediate for the total synthesis of Strychnos indole alkaloids
基于手性3,3',5,5',6,6'-设计并合成了新的2,2'-双(二苯基膦酰氧基)-1,1'-联萘(binapo)型手性二膦酸酯配体的库六取代的双酚。这些bop配体在钯催化的分子间烯丙基胺化反应中显示出卓越的效率,这为马来酸酐吲哚生物碱的全合成提供了关键中间体,对映体纯度高达96% ee。