| 1093135-93-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• CAS: 1093135-93-3
• 化学式: C₄₉H₇₁NO₃₁
• 分子量: 1170.09
• InChiKey: QTNZWSRLDUYEDA-FPAMCNJXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -9.92
• 重原子数：
  81.0
• 可旋转键数：
  19.0
• 环数：
  12.0
• sp3杂化的碳原子比例：
  0.84
• 拓扑面积：
  489.84
• 氢给体数：
  17.0
• 氢受体数：
  31.0

反应信息

• 作为产物：
  描述：

  O-[(α-D-mannopyranosyl)-(1->6)-(α-D-mannopyranosyl)-(1->3)-β-D-mannopyranosyl]-(1->4)-(1,2-dideoxy-α-D-glucopyrano)-[2,1-d]-2-methyloxazoline 、 芍药苷 在 endo-β-N-acetylglucosaminidase from Arthrobactor protophormiae 作用下， 以 二甲基亚砜 为溶剂， 反应 2.0h， 以60%的产率得到
  参考文献：
  名称：

  Introducing N-glycans into natural products through a chemoenzymatic approach

  摘要：

  The present study describes an efficient chemoenzymatic method for introducing a core N-glycan of glycoprotein origin into various lipophilic natural products. It was found that the endo-beta-N-acetylglucosaminidase from Arthrobactor protophormiae (Endo-A) had broad substrate specificity and can accommodate a wide range of glucose (Glc)- or N-acetylglucosamine (GIcNAc)-containirig natural products as acceptors for transglycosylation, when an N-glycan oxazoline Was used as a donor substrate. Using lithocholic acid as a model compound, we have shown that introduction of an N-glycan could be achieved by a two-step approach: chemical glycosylation to introduce a monosaccharide (GIc or GIcNAc) as a handle, and then Endo-A catalyzed transglycosylation to accomplish the site-specific N-glycan attachment. For those natural products that already carry terminal GIc or GIcNAc residues, direct enzymatic transglycosylation using sugar oxazoline as the donor substrate was achievable to introduce an N-glycan. It was also demonstrated that simultaneous double glycosylation could be fulfilled when the natural product contains two GIc residues. This chemoenzymatic method is concise, site-specific, and highly convergent. Because N-glycans of glycoprotein origin can serve as ligands for diverse lectins and cell-surface receptors, introduction of a defined N-glycan into biologically significant natural products may bestow novel properties onto these natural products for drug discovery and development. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.carres.2008.08.033