A general and accurate nmr determination of the enantiomeric purity of α-aminoacids and α-aminoacid derivatives
作者:Monique Calmes、Jacques Daunis、Robert Jacquier、Jean Verducci
DOI:10.1016/s0040-4020(01)86812-5
日期:——
Derivatization of α-aminoacids, α-aminoesters and α-aminolactones as N-acetyl derivatives allow the accurate NMR determination of the enantiomeric purity. In these conditions the major coordination site with a chiral shift reagent will correspond to the NMR observation site. Experimental factors leading to the highest ΔΔδ values are ascertained. No straightforward correlation with absolute configurations
作为N-乙酰基衍生物的α-氨基酸,α-氨基酯和α-氨基内酯的衍生化可以对对映体纯度进行准确的NMR测定。在这些条件下,具有手性移位试剂的主要配位点将对应于NMR观察位点。确定导致最高ΔΔδ值的实验因素。无法建立与绝对配置的直接关联。