Selective Homodecoupled 1D-1H NMR Experiment for Unravelling Enantiomers

被引:6
|
作者
Naresh, K. S. [1 ,3 ]
Kumar, Theerthan N. [1 ]
Singam, Siva Sankara Reddy [2 ,3 ]
Chaudhari, Sachin R. [1 ,3 ]
机构
[1] CSIR Cent Food Technol Res Inst, Dept Spice & Flavour Sci, Mysuru 570020, Karnataka, India
[2] CSIR Cent Food Technol Res Inst, Dept Food Safety, Analyt Qual Control Lab, Mysuru 570020, Karnataka, India
[3] AcSIR Acad Sci & Innovat Res, Ghaziabad 201002, Uttar Pradesh, India
关键词
LANTHANIDE SHIFT-REAGENTS; CHIRAL DISCRIMINATION; H-1-NMR SPECTRA; SEPARATION; RESOLUTION; EXCESS; ENANTIODISCRIMINATION; SPECTROSCOPY; RECOGNITION;
D O I
10.1021/acs.analchem.2c01020
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
H-1 NMR spectroscopy is a quick and easy tool to resolve enantiomers. However, the paradigm of resolution of enantiomers by 1H NMR is a difficult task due to the minor chemical shift differences and overlap of the resonances of the enantiomers. In the current study, we have performed the conventional selective homodecoupling 1D -H-1 NMR experiment to achieve chiral resolutions. The predominant features of the proposed methods are (a) high sensitivity as opposed to routinely employed pure shift NMR experiments, (b) easy optimization like conventional 1D -H-1 NMR, and (c) an artifact-free spectrum. The application of the method has been exhibited in the measurement of proton chemical shift differences between diastereomers and enantiomer excess (ee). The broad use of the proposed method was demonstrated by employing the six samples utilizing the chiral solvating and derivatizing agents.
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页码:10299 / 10303
页数:5
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