A simple protocol for determination of enantiopurity of amines using BINOL derivatives as chiral solvating agents <i>via</i><sup>1</sup>H- and <sup>19</sup>F-NMR spectroscopic analysis
作者:Pooja Chaudhary、Geeta Devi Yadav、Surendra Singh
DOI:10.1039/d2ra05291a
日期:——
A rapid and simple protocol for the determination of enantiopurity of primary and secondary amines was developed by using (S)-BINOL/(S)-BINOL derivatives/(R)-1,1′-binaphthyl-2,2′-diyl hydrogenphosphate as chiral solvating agents via 1H- and 19F-NMR spectroscopic analysis. In this protocol, the analyte and chiral solvating agent were directly mixed in an NMR tube in chloroform-d and after shaking for
使用 ( S )-BINOL/( S )-BINOL 衍生物/( R )-1,1'-binaphthyl-2,2'- diyl hydrophosphate通过 1 H- 和19 F-NMR 光谱分析作为手性溶剂化剂。在该方案中,分析物和手性溶剂在 NMR 管中直接混合在氯仿-d中,并在摇动 30 秒后将1 H- 和19记录了 F-NMR 光谱,这为分析物中存在的两种对映异构体提供了良好分辨的共振峰。测定了1,2-二苯基乙二胺的对映体过量,并观察到与系数R 2 = 0.9995 的线性关系。通过使用紫外-可见光谱,还计算了分析物5的两种对映异构体与 CSA ( S ) -3a之间形成的非对映体复合物的结合常数和相关的 Δ G值。