Use of Axially Chiral 2′-Methoxy-1,1′-binaphthyl-2-carboxylic Acid as Chiral Derivatizing Agent for Discrimination of Enantiomeric Alcohols and Amines by<sup>1</sup>H NMR
作者:Sotaro Miyano、Shin-ichi Okada、Hiroki Hotta、Masayuki Takeda、Takatsugu Suzuki、Chizuko Kabuto、Fujiko Yasuhara
DOI:10.1246/bcsj.62.3886
日期:1989.12
separation of those protons, allowing determination of the enantiomeric purities and assignment of the absolute configurations of the enantiomeric alcohols and amines. An X-ray crystallographic analysis of the amide ((aS,S)-2) obtained from (aS)-1 and (S)-1-phenylethylamine showed structural resemblance between the amides and esters of 1. Steric models which explain the NMR behavior of the diastereomeric
轴向手性 2'-甲氧基-1,1'-联萘-2-羧酸 (1) 被有效地用作手性衍生剂,通过 1H NMR 借助 Eu(fod)3 区分对映体醇和胺。在由 (aS)-1 和 α-手性醇或胺制备的一对非对映体酯或酰胺中,(aS,R)-非对映体的甲氧基质子表现出比( aS,S)-对应物。因此,添加高达 0.5-1.0 等量的 Eu(fod)3 会导致这些质子的基线分离,从而可以确定对映体纯度并确定对映体醇和胺的绝对构型。酰胺 ((aS, 从 (aS)-1 和 (S)-1-苯乙胺获得的 S)-2) 显示出 1 的酰胺和酯之间的结构相似性。解释非对映体酯和酰胺的 NMR 行为的空间模型基于 X-射线分析。还报道了两种方法...