Determination of the absolute configuration of monosaccharides by 1H NMR spectroscopy of their per-O-(S)-2-methylbutyrate derivatives
作者:William S. York、Stephen Hantus、Peter Albersheim、Alan G. Darvill
DOI:10.1016/s0008-6215(97)00050-5
日期:1997.5
Abstract An empirical method was developed to determine the absolute configuration of monosaccharides, based on high-field 1H NMR spectroscopy of their per- O-(S)-2-methylbutyrate (SMB) derivatives. The SMB derivatives of the D and L forms of a given monosaccharide are diastereomers, allowing them to be distinguished on the basis of differences in their 1H NMR chemical shifts. The reproducibility of
摘要建立了一种基于经验的方法来确定其单糖的绝对构型,该方法基于其过O-(S)-2-甲基丁酸酯(SMB)衍生物的1H NMR光谱。给定单糖的D和L形式的SMB衍生物为非对映异构体,可根据其1H NMR化学位移的差异进行区分。这些化学位移差异的可重复性可以通过比较数据库中SMB衍生物的光谱与标准光谱来常规确定各种单糖的绝对构型,从而无需为每次分析准备和分析新的标准。衍生过程使用廉价,易于处理的试剂,并且实际上是完整的。将该方法应用于三种复杂的聚糖,可以明确确定其组成单糖的绝对构型。几种单糖的对映体形式可通过其过-O-(S)-2-甲基丁酸酯衍生物的高场1H NMR光谱进行区分。