2,4,6-tri-O-acetyl-3-O-benzyl-L-idopyranosyl trichloroacetimidate | 256348-52-4

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 2,4,6-tri-O-acetyl-3-O-benzyl-L-idopyranosyl trichloroacetimidate
• 英文别名: Bn(-3)Ido2Ac4Ac6Ac-O-C(NH)CCl3；[(2S,3R,4S,5R)-3,5-diacetyloxy-4-phenylmethoxy-6-(2,2,2-trichloroethanimidoyl)oxyoxan-2-yl]methyl acetate
• CAS: 256348-52-4
• 化学式: C₂₁H₂₄Cl₃NO₉
• 分子量: 540.782
• InChiKey: HYTVLVZDWTUPII-QWJAOUKZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  34
• 可旋转键数：
  12
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  130
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  2,4,6-tri-O-acetyl-3-O-benzyl-L-idopyranosyl trichloroacetimidate 在 potassium bromide 吡啶 、 4-二甲氨基吡啶 、 2,2,6,6-tetramethyl-piperidine-N-oxyl 、 sodium hypochlorite 、 camphor-10-sulfonic acid 、 三氟化硼乙醚 、 四丁基氯化铵 、 水 、 sodium methylate 、 2,2-二甲氧基丙烷 作用下， 以 二氯甲烷 、 溶剂黄146 为溶剂， 生成 methyl 2-O-acetyl-3-O-benzyl-α-L-idopyranosiduronic acid
  参考文献：
  名称：

  Synthesis and biological activity of oligomer-model compounds containing units of a key platelet-binding disaccharide of heparin

  摘要：

  A key disaccharide unit in heparin, O-(2-deoxy-2-sulfamido-6-O-sulfo-alpha-D-glucopyranosyl)-(1-->4)-2-O-sulfo-alpha-L-idopyranosyluronic acid, was previously found to be responsible for the binding interaction of heparin to platelets. A clustering effect to enhance the binding was found to be dependent on the number and frequency of the disaccharide units in a heparin molecule. To systematically examine the clustering effect, three oligomer-model compounds containing two or three units of the disaccharide were synthesized. These compounds inhibited (3)H-Iabelled heparin binding to human platelets more strongly than a compound containing only one unit of the disaccharide, (C) 1999 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(99)01084-9
• 作为产物：
  描述：

  1,2,4,6-tetra-O-acetyl-3-O-benzyl-L-idopyranose 在 哌啶 、 caesium carbonate 作用下， 以 四氢呋喃 、 二氯甲烷 、 溶剂黄146 为溶剂， 生成 2,4,6-tri-O-acetyl-3-O-benzyl-L-idopyranosyl trichloroacetimidate
  参考文献：
  名称：

  Synthesis and biological activity of oligomer-model compounds containing units of a key platelet-binding disaccharide of heparin

  摘要：

  A key disaccharide unit in heparin, O-(2-deoxy-2-sulfamido-6-O-sulfo-alpha-D-glucopyranosyl)-(1-->4)-2-O-sulfo-alpha-L-idopyranosyluronic acid, was previously found to be responsible for the binding interaction of heparin to platelets. A clustering effect to enhance the binding was found to be dependent on the number and frequency of the disaccharide units in a heparin molecule. To systematically examine the clustering effect, three oligomer-model compounds containing two or three units of the disaccharide were synthesized. These compounds inhibited (3)H-Iabelled heparin binding to human platelets more strongly than a compound containing only one unit of the disaccharide, (C) 1999 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(99)01084-9

文献信息

• Glycosylations of Simple Acceptors with 2‐ <i>O</i> ‐Acyl <scp>l</scp> ‐Idose or <scp>l</scp> ‐Iduronic Acid Donors Reveal Only a Minor Role for Neighbouring‐Group Participation
  作者：Shifaza Mohamed、Qi Qi He、Romain J. Lepage、Elizabeth H. Krenske、Vito Ferro

  DOI：10.1002/ejoc.201800318

  日期：2018.5.24

  Several l-idose and l-iduronic acid glycosyl donors (mostly thioglycosides but also halides and trichloroacetimidates) with acyl protecting groups at the C-2 position were prepared and evaluated in glycosylation reactions with simple acceptors. In glycosaminoglycan oligosaccharide syntheses in the literature, the presence of C-2 acyl protecting groups in l-ido-configured glycosyl donors generally results

  在 C-2 位具有酰基保护基团的几个 l-艾杜糖和 l-艾杜糖醛酸糖基供体（主要是硫代糖苷，但也有卤化物和三氯乙酰亚胺）被制备并在与简单受体的糖基化反应中进行评估。在文献中的糖胺聚糖寡糖合成中，l-ido 构型糖基供体中 C-2 酰基保护基团的存在通常导致 1,2-反式糖苷键的排他性形成，这一发现通常归因于相邻基团参与。然而，这里报道的具有 l-ido 配置的供体（特别是硫糖苷）的简单醇的糖基化通常显示出不完全的立体控制并产生 1,2-反式和 1,2-顺式产物的混合物，表明相邻组的参与具有在这些反应中不太重要。确定了糖基供体和反应条件，它们对作为主要产物的所需 α-1-异头异构体（1,2-反式）提供了改进的选择性，但不是唯一的。有趣的是，在相同反应条件下，使用更复杂的单糖受体进行糖基化仅产生预期的 1,2-反式产物。使用密度泛函理论 (DFT) 计算探索了相邻基团参与这些糖基化的作用，这表
• Synthesis of heparin partial structures and their binding activities to platelets
  作者：Shuhei Koshida、Yasuo Suda、Michael Sobel、Julie Ormsby、Shoichi Kusumoto

  DOI：10.1016/s0960-894x(99)00550-8

  日期：1999.11

  A synthetic pentasaccharide corresponding to the antithrombin III-binding region in heparin was also found to bind to human platelets. To identify the platelet-binding site in the pentasaccharide which is expected to be a novel sequence in heparin responsible for its platelet-binding, five partial structures of this particular pentasaccharide were synthesized. In a competitive assay using [H-3]-heparin, a trisaccharide, O-(2-deoxy-2-sulfamido-3,6-di-O-sulfo-alpha-D-glucopyranosyl)-(1-->4)-O-(2-O-sulfo-alpha-L-idopyranosyluronic acid)-(1-->4)-2-deoxy-2-sulfamido-6-O-sulfo-alpha-D-glucopyranose, was concluded to be a high-affinity site for heparin's binding to platelets. (C) 1999 Elsevier Science Ltd. All rights reserved.
• Synthesis of oligomeric assemblies of a platelet-binding key disaccharide in heparin and their biological activities
  作者：Shuhei Koshida、Yasuo Suda、Michael Sobel、Shoichi Kusumoto

  DOI：10.1016/s0040-4039(00)01826-8

  日期：2001.2

  Heparin, highly sulfated glycosaminoglycan, binds to platelets. A key disaccharide unit in heparin was previously found to be responsible for the binding, and the Frequency of the disaccharide unit was important for the binding potency. A newly developed method based on the reductive amination was effectively applied to prepare structurally defined oligomeric assemblies possessing multiple units of the key disaccharide. From their platelet-binding activities measured by the competitive binding assay, the enhancement of the activity was clearly observed with increasing number of the key disaccharide. (C) 2001 Elsevier Science Ltd. All rights reserved.