Aryl[2.2]paracyclophane-Based Chiral Regioisomeric Analogs of Salicyl Aldehyde: Novel Sources for Construction of Phenoxy-Imine Ligands
作者:Roman P. Zhuravsky、Tatiana I. Danilova、Dmitrii Yu. Antonov、Elena V. Sergeeva、Zoya A. Starikova、Ivan A. Godovikov、Michail M. Il'in、Valeria I. Rozenberg
DOI:10.1002/ijch.201100096
日期:2012.2
Efficient procedures for the resolution of the racemic hydroxy aldehydes into enantiomers via Schiff bases with enantiomers of α‐phenylethyl amine were elaborated, and the absolute configurations of enantiomers were established on the basis of X‐ray analysis of diastereomeric imines. Starting from these chiral hydroxy aldehydes the first representatives of bi‐, tri‐, and tetradentate phenoxy‐imine ligands
高效,高产率的两种新型区域异构水杨醛类似物,4-甲酰基-13-(2-羟基苯基)-[2.2]对环环糊精和4-甲酰基-12-(2-羟基苯基)-[2.2]对环环糊精(iso ‐FHPhPC和伪‐FHPhPC描述了分别基于芳基[2.2]对环环烷骨架构建的。骨架形成的关键阶段是对环烷酰基卤化物与芳基硼酸的Suzuki交叉偶联。阐述了通过席夫碱与α-苯乙胺对映体将外消旋羟基醛拆分为对映异构体的有效方法,并根据非对映异构亚胺的X射线分析建立了对映体的绝对构型。从这些手性羟基醛开始,获得了属于芳基[2.2]对环环烷族的双齿,三齿和四齿苯氧基亚胺配体的第一个代表。在Et 2 Zn与醛的不对称加成中测试了配体的诱导能力。