where the glycopeptides are bridged by a terephthaloyl group, is an 83:17 mixture of two conformers; the amide groups of the major isomer have E-anti conformations. The spatial relationship and the relative orientation of the sugars are restricted, which may have consequences for the recognition of this and related structures in biological systems.
[反应:请参见文字]。Ugi反应已用于制备二价半
乳糖衍
生物。NMR分析表明,二糖新糖缀合物是两个构象物的83:17混合物,其中糖肽被对苯二甲酰基桥接。主要异构体的酰胺基具有E-抗构象。糖的空间关系和相对方向受到限制,这可能会对
生物系统中这种结构和相关结构的识别产生影响。