摘要Nmr光谱(1 H,13 C)已显示伯胺与d-核糖缩合,主要生成d-核糖吡喃糖基胺,其中1 C 4构象的α端基异构体占优势。β端基异构体主要呈现4 C 1构象。因此,有可能推论N-苯基-d-核糖胺的结构并使某些文献数据相关。对于2,3-O-异亚丙基-d-呋喃呋喃糖基胺衍生物,异亚丙基甲基的13 Cn.mr信号的Δδ值可用于建立异头构型。
First synthesis of indirubin N-glycosides (red sugars)
摘要:
The first indirubin N-glycosides were prepared by reaction,of isatine N-glycosides with indoxyl acetate under basic conditions. (c) 2006 Elsevier Ltd. All rights reserved.