(2R,3R,4S,5R,6S)-5-phenylmethoxy-2-(phenylmethoxymethyl)-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]oxane-3,4-diol | 201053-19-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2R,3R,4S,5R,6S)-5-phenylmethoxy-2-(phenylmethoxymethyl)-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]oxane-3,4-diol
• CAS: 201053-19-2
• 化学式: C₄₀H₄₄O₉
• 分子量: 668.784
• InChiKey: NBFNCXHHEPFOKF-AEQXTEDISA-N

物化性质

• 沸点：
  789.6±60.0 °C(Predicted)
• 密度：
  1.27±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  49
• 可旋转键数：
  16
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  105
• 氢给体数：
  2
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-2-(dibenzylphosphityl)-3,5-dideoxy-β-D-glycero-D-galacto-2-nonulopyranosonate 、 (2R,3R,4S,5R,6S)-5-phenylmethoxy-2-(phenylmethoxymethyl)-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]oxane-3,4-diol 在 三氟甲磺酸三甲基硅酯 作用下， 以 乙腈 为溶剂， 反应 0.67h， 以41%的产率得到4-acetoxy-5-acetylamino-2-[3-benzyloxy-2-(4-benzyloxy-2-benzyloxymethyl-3,4-dihydro-2H-pyran-3-yloxy)-6-benzyloxymethyl-5-hydroxy-tetrahydro-pyran-4-yloxy]-6-(1,2,3-triacetoxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester
  参考文献：
  名称：

  神经节苷脂GM（1）的甲基糖苷的全合成。

  摘要：

  GM（1）（1b）甲基糖苷的总合成已完成。合成中的关键步骤涉及磺酰胺基糖苷化反应，该反应用于产生β键，导致连接到C3唾液酸化乳糖基部分的半乳糖单元的C4羟基的GalNAc残基。在这种情况下，还出现了以前假定的“近端羟基”导向作用，并导致β-糖苷的大量形成。连同积雪草GM（1）和其他子结构，GM（1）甲基糖苷已被提交用于生物学检测，作为细菌和病毒感染部位的潜在配体。

  DOI：

  10.1021/jo9912496
• 作为产物：
  描述：

  (3aS,4R,6S,7R,7aS)-7-Benzyloxy-6-((2R,3S,4R)-4-benzyloxy-2-benzyloxymethyl-3,4-dihydro-2H-pyran-3-yloxy)-4-triisopropylsilanyloxymethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-2-one 在 四丁基氟化铵 、 sodium hydride 、 potassium carbonate 、 溶剂黄146 作用下， 以 四氢呋喃 、 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 生成 (2R,3R,4S,5R,6S)-5-phenylmethoxy-2-(phenylmethoxymethyl)-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]oxane-3,4-diol
  参考文献：
  名称：

  Synthesis of Asialo GM₁. New Insights in the Application of Sulfonamidoglycosylation in Oligosaccharide Assembly:  Subtle Proximity Effects in the Stereochemical Governance of Glycosidation

  摘要：

  The total synthesis of asialo GM(1) (1a) has been accomplished, Using related chemistry, the methyl glycoside of the asialo compound (1b) has also been synthesized. These kinds of compounds have been identified as potential ligands for bacterial and viral infection sites, A simpler structure, which hits also been identified for its infection attracting structure in the context of glycopeptides and glycolipids (methyl glycoside 2), has also been synthesized. The key common phase in the syntheses involves the sulfonamidoglycosidation reaction which is used to create a beta-linkage leading to a galNAc residue joined to the C-4 hydroxyl group of a galactose unit either as a monosaccharide (see compound 2) or as C-4' in the contest of a lactosyl moiety, During the course of these studies there was encountered an unusual "proximal hydroxyl" directing effect. Thus, when C-4 on the galactose ring of an azaglycosylating donor bears a free hydroxyl (see, for instance, compound 13), beta-glycoside formation predominates. When this hydroxyl group is blocked, the process tends in the direction of alpha-glycoside formation (see compound 32), These findings were explained as arising from a critical intramolecular hydrogen bond between the C-4 axial hydroxyl of the galactose donor and its proximal pyranosidal ring oxygen. This interaction stabilizes conformations from which beta-glycosidation predominates.

  DOI：

  10.1021/ja9724957

文献信息

• New Applications of the <i>n</i>-Pentenyl Glycoside Method in the Synthesis and Immunoconjugation of Fucosyl GM₁:  A Highly Tumor-Specific Antigen Associated with Small Cell Lung Carcinoma
  作者：Jennifer R. Allen、Samuel J. Danishefsky

  DOI：10.1021/ja992594f

  日期：1999.12.1

  to allow for smooth global deprotection. The synthesis and subsequent immunocharacterization served to confirm the assigned structure of the natural tumor antigen. Fully synthetic conjugate 1c advances our program toward the goal of using a synthetic vaccine containing fucosyl GM1 as a potential target for immune attack against small cell lung carcinoma.

  岩藻糖基 GM1 戊烯糖苷 1b 的合成及其与载体蛋白 KLH 的结合产生 1c 是相关的。使用包含在还原端正戊烯基糖苷 (NPG) 中的侧链烯烃实现 1b 的生物偶联。努力的关键步骤是使用我们的磺酰胺糖苷化方案进行立体特异性 [3 + 3] 偶联反应（参见 23 + 12 → 15）。需要预先安装 NPG 以获得最佳 [3 + 3] 耦合产量并允许平滑的全局脱保护。合成和随后的免疫表征用于确认天然肿瘤抗原的指定结构。完全合成的偶联物 1c 使我们的计划朝着使用含有岩藻糖基 GM1 的合成疫苗作为免疫攻击小细胞肺癌的潜在目标的目标前进。