<scp>d</scp>-Glucuronate and <scp>d</scp>-Glucuronate Glycal Acceptors for the Scalable Synthesis of <scp>d</scp>-GlcN-α-1,4-<scp>d</scp>-GlcA Disaccharides and Modular Assembly of Heparan Sulfate
作者:Imlirenla Pongener、Gavin J. Miller
DOI:10.1021/acs.joc.3c01108
日期:2023.8.4
Reported herein is a scalable chemical synthesis of disaccharide building blocks for heparan sulfate (HS) oligosaccharide assembly. The use of d-glucuronate-based acceptors for dehydrative glycosylation with d-glucosamine partners is explored, enabling diastereoselective synthesis of appropriately protected HS disaccharide building blocks (d-GlcN-α-1,4-d-GlcA) on a multigram scale. Isolation and characterization
本文报道了用于硫酸乙酰肝素(HS)寡糖组装的二糖结构单元的可扩展化学合成。探索了使用基于d-葡萄糖醛酸的受体与d-葡萄糖胺伙伴进行脱水糖基化,从而能够在多克规模上非对映选择性合成适当保护的 HS 二糖结构单元 ( d -GlcN-α-1,4- d -GlcA)。关键供体(1,2 糖醛)和受体(原酸酯、脱水)衍生副产物的分离和表征确保方法改进以减少其形成;用对甲氧基苯基单元保护异头位置的d-葡萄糖醛酸受体被证明是最佳的。我们还引入了糖醛酸受体,表明它们的反应性与吡喃糖醛酸受体相当。总而言之,这种克级访问提供了探索包含d -GlcN-α-1,4- d -GlcA 重复序列的已定义 HS 序列的迭代组装的能力,通过完成两个四糖合成来强调这一点。