Combinatorial Synthesis of an Oligosaccharide Library by Using β-Bromoglycoside-Mediated Iterative Glycosylation of Selenoglycosides: Rapid Expansion of Molecular Diversity with Simple Building Blocks
作者:Shigeru Yamago、Takeshi Yamada、Hiroki Ito、Osamu Hara、Yosuke Mino、Jun-ichi Yoshida
DOI:10.1002/chem.200500126
日期:2005.10.21
new method for constructing an oligosaccharide library composed of structurally defined oligosaccharides is presented based on an iterative glycosylation of selenoglycosides. Treatment of 2-acyl-protected selenoglycosides with bromine selectively generates beta-bromoglycosides, which serve as glycosyl cation equivalents in the oligosaccharide synthesis. Thus, the coupling of the bromoglycosides with
基于硒代糖苷的迭代糖基化,提出了一种构建由结构定义的寡糖组成的寡糖文库的新方法。用溴处理2-酰基保护的硒代糖苷可选择性生成β-溴代糖苷,其在寡糖合成中充当糖基阳离子等同物。因此,溴糖苷与另一硒代糖苷的偶联提供了相应的糖基化硒代糖苷,其可以直接用于下一个糖基化。该序列的迭代允许合成多种寡糖,包括激发子活性七糖。迭代糖基化的特征是,在与糖基受体偶联之前,可以通过活化糖基供体选择性地偶联糖基供体和具有相同端基反应性的受体。因此,相同的硒代糖苷可用于糖基供体和受体。通过针对激发子活性寡糖的寡糖文库的构建来举例说明该特征。可以从简单的硒糖苷开始构建由立体化学定义的寡糖组成的具有相当大的结构多样性的文库。该特征已通过构建针对激发子活性寡糖的寡糖文库来举例说明。可以从简单的硒糖苷开始构建由立体化学定义的寡糖组成的具有相当大的结构多样性的文库。通过针对激发子活性寡糖的寡糖文库的构建来举例说明该特征。可以从