Nucleosides. Part L.. Structure of lumazine<i>N</i><sup>1</sup>-(2′-deoxy-<scp>D</scp>-ribonucleosides) ( = 1-(2′-deoxy-<scp>D</scp>-ribofuranosyl)pteridine-2,4(1<i>H</i>,3<i>H</i>)-diones): A revision of the anomeric configuration
The anomericconfiguration of the glycosidic bond in lumazine N1-(2′-deoxy-D-ribonucleosides) 1–6 was investigated by NOE difference spectroscopy. The former configurational assignment of the α - and β -D-anomers 1 and 2, 3 and 4, and 5 and 6, respectively, has to be reversed to be in agreement with the physical data. Additional proof is presented by X-ray analysis of 3 and 6. Chemical interconversions
通过NOE差光谱法研究了lumazine N 1-(2'-脱氧-D-核糖核苷)1-6中糖苷键的异头构型。必须分别颠倒先前的α-和β-D-异头物1和2、3和4,以及5和6的构型分配,以与物理数据保持一致。通过3和6的X射线分析可以提供其他证据。1-(2'-脱氧-β-D-核呋喃核糖基)-6,7-二苯基鲁嗪(6)的化学互变为2,3'-脱水鲁嗪2'-脱氧核糖核苷16和17 也与修订后的异头构型一致。
Charubala, Ramamurthy; Bannwart, Willi; Pfleiderer, Wolfgang, Liebigs Annalen der Chemie, 1980, # 1, p. 65 - 79
作者:Charubala, Ramamurthy、Bannwart, Willi、Pfleiderer, Wolfgang