Efficient Synthesis of the Deoxysugar Part of Versipelostatin by Direct and Stereoselective Glycosylation and Revision of the Structure of the Trisaccharide Unit
作者:Hiroshi Tanaka、Atsushi Yoshizawa、Shuhei Chijiwa、Jun-ya Ueda、Motoki Takagi、Kazuo Shin-ya、Takashi Takahashi
DOI:10.1002/asia.200800448
日期:2009.7.6
Sweets for my sweet! Efficient synthesis of the deoxysugar part of versipelostatin (VST) was achieved by direct and stereoselective glycosidation of the reduced VST aglycon. Comparison of the synthetic and natural VST products using NMR indicate that VST has a β‐d‐digitoxose‐(1,4)‐α‐l‐oleandrose‐(1,4)‐β‐d‐digitoxose trisaccharide. A biological assay indicates that the deoxyoligosaccharide unit of the
糖果给我带来甜蜜!通过减少的VST糖苷配基的直接和立体选择性糖苷化,可实现Versipelostatin(VST)的脱氧糖部分的有效合成。使用NMR对合成和天然VST产品进行的比较表明,VST具有一个β-d-地氧糖-(1,4)-α-l-oleandrose-(1,4)-β-d-地氧糖三糖。生物学测定表明,合成糖苷的脱氧寡糖单元对于生物学活性很重要。