Preparation of Two New Diasteromeric Chiral Stationary Phases Based on (+)-(18-Crown-6)-2,3,11,12-tetracarboxylic Acid and (R)- or (S)-1-(1-Naphthyl)ethylamine and Chiral Tethering Group Effect on the Chiral Recognition
作者:Rajalingam Agneeswari、Ji Sung、Eun Jo、Hee Jeon、Vellaiappillai Tamilavan、Myung Hyun
DOI:10.3390/molecules21081051
日期:——
effect on the chiral recognition while (S)-1-(1-naphthyl)ethylamine and (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid constituting CSP 2 were concluded to show an uncooperative (“mismatched”) effect on the chiral recognition. From these results, it was concluded that (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid can be successfully used as a chiral tethering group for the preparation of new CSPs
基于 (+)-(18-crown-6)-2,3,11,12-四羧酸作为手性束缚基团和 Π-碱性手性单元(如 (R))的两种新型非对映体手性固定相 (CSP)制备-1-(1-萘基)乙胺(CSP 1)或(S)-1-(1-萘基)乙胺(CSP 2)。使用 20% 异丙醇/己烷作为常规流动相,将这两种 CSP 应用于 N-(3,5-二硝基苯甲酰基)-1-苯基烷基胺和 N-(3,5-二硝基苯甲酰基)-α-氨基酸衍生物的对映体分离阶段。为了阐明两个手性单元对手性识别的影响,将两种CSP的手性识别能力相互比较,并与基于(R)-1-(1-萘基)的CSP(CSP 3)的手性识别能力进行比较乙胺。从色谱手性识别结果来看,(R)-1-(1-萘基)乙胺和(+)-(18-crown-6)-2,3,11,构成 CSP 1 的 12-四羧酸显示出对手性识别的协同(“匹配”)效应,而 (S)-1-(1-萘基) 乙胺和 (+)-(18-crown-6)-2构成