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R-VAPOL-phosphoric acid based H-1 and C-13-NMR for sensing of chiral amines and acids

机译:基于R- VAPOL-磷酸的H-1和C-13-NMR,用于检测手性胺和酸

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摘要

Enantiomers have significant importance in pharmaceuticals, biology and modern chemistry and therefore distinguishing and quantifying the enantiomeric forms is of utmost importance. Herein, we propose diphenyl-3,3 '-biphenanthryl-4,4 '-diyl phosphate (R-VAPOL-PA) as a promising chiral solvating agent to discriminate amines and acids of poly-functional groups such as chiral amines, amino alcohols and hydroxy acids. The methodological approach involves using the nature of hydrogen bonds and ion pairs as a mode of weak interactions to form diastereomers where the probe is associated with enantiomers. The resulting diastereomer difference in the NMR spectrum enables the chiral discrimination with a complete baseline peak separation and an accurate enantiomeric excess (ee) analysis. We also carried out density functional theory (DFT) calculations to understand the complex formation to explain enantiodiscrimination by analysing the formation and stability of different chiral complexes. The binding energy differences between enantiomeric forms revealed by DFT calculations are qualitatively in agreement with the diastereomer difference in the NMR spectrum and unequivocally establishes the suggested experimental protocol of R-VAPOL-PA-based enantiomeric discrimination.
机译:对映体在制药,生物和现代化学显著重要性,因此鉴别和定量的对映体形式是非常重要的。在此,我们提出二苯基-3,3“-biphenanthryl -4,4” - 二基磷酸盐(R-VAPOL-PA)作为有力的手性溶解剂判别胺和多官能团,例如手性胺,氨基醇的酸的和羟基酸。的方法学方法涉及使用的氢键和离子对作为弱相互作用的一个模式的性质,以形成其中所述探针与对映异构体非对映体相关联。在NMR谱所得到的非对映体差使得能够与一个完整的基线峰的分离和准确的对映体过量(ee)分析手性歧视。我们还进行了密度泛函理论(DFT)计算,以了解该复合物的形成,通过分析不同的手性复合物的形成和稳定来解释enantiodiscrimination。对映体形式之间的结合能的差异揭示的DFT计算定性与在NMR谱非对映体差协议和明确地建立-VAPOL-的R PA-对映体歧视的建议的实验方案。

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  • 来源
    《RSC Advances》 |2020年第4期|共10页
  • 作者单位

    CSIR Cent Food Technol Res Inst Dept Spice &

    Flavour Sci Mysore 570020 Karnataka India;

    Indian Inst Technol Jodhpur Dept Phys Karwar 342037 Rajasthan India;

    CSIR Cent Food Technol Res Inst Dept Spice &

    Flavour Sci Mysore 570020 Karnataka India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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