The formation of complexes between aza-derivatives of crown ethers and primary alkylammonium salts. Part 5. Chiral macrocyclic diamines
作者:David P. J. Pearson、Stephen J. Leigh、Ian O. Sutherland
DOI:10.1039/p19790003113
日期:——
analogous to crown ethers, are described. The chirality of these systems is based, in one case, upon the plane of chirality of paracyclophane systems and, in the other two cases, upon the axis of chirality of bridged biphenyls. Two methods are described for the measurement of chiral selectivity in the formation of complexes between these chiral macrocyclic host molecules and chiral guest primary alkylammonium
描述了类似于冠醚的三种类型的手性大环二胺的合成。在一种情况下,这些系统的手性基于对环烷系统的手性平面,而在另两种情况下,则基于桥联联苯的手性轴。描述了两种方法,用于测量这些手性大环主体分子与手性客体伯烷基铵盐之间形成络合物的手性选择性。两种方法都使用nmr光谱法,单相系统,外消旋手性宿主以及(R)-和(RS)-客体盐。第一种方法既适用于光学不稳定的宿主,也适用于光学稳定的宿主,第二种方法仅适用于光学不稳定的宿主物种。