ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside | 146788-09-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside
• 英文别名: ethyl O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1→4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside；(2R,3S,4S,5R,6S)-2-(Acetoxymethyl)-6-(((2R,3R,4S,5R,6S)-4,5-diacetoxy-2-(acetoxymethyl)-6-(ethylthio)tetrahydro-2H-pyran-3-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate；[(2R,3S,4S,5R,6S)-3,4,5-triacetyloxy-6-[(2R,3R,4S,5R,6S)-4,5-diacetyloxy-2-(acetyloxymethyl)-6-ethylsulfanyloxan-3-yl]oxyoxan-2-yl]methyl acetate
• CAS: 146788-09-2
• 化学式: C₂₈H₄₀O₁₇S
• 分子量: 680.681
• InChiKey: WUANIQLTJBQGJW-JRFIZLOQSA-N

物化性质

• 熔点：
  72 °C
• 沸点：
  684.0±55.0 °C(Predicted)
• 密度：
  1.34±0.1 g/cm3(Predicted)
• 溶解度：
  可溶于氯仿（少许）、甲醇（少许）

计算性质

• 辛醇/水分配系数(LogP)：
  0.4
• 重原子数：
  46
• 可旋转键数：
  20
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  237
• 氢给体数：
  0
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside 在 potassium tert-butylate 作用下， 以 甲醇 为溶剂， 反应 6.0h， 以94%的产率得到ethyl 4-O-β-galactopyranosyl-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  神经节苷脂GM3的高效短程全合成：有效利用邻群参与策略

  摘要：

  我们已经开发了一种有效的方法，用于使用3位取代的唾液酸进行高度立体选择性的唾液酸化，并制备了具有3个β-苯硫基的2a作为唾液酸供体。适当保护的乳糖苷3被2a糖基化，仅以高收率得到α-唾液酸三糖16。使用促进剂DMTST或NIS-TfOH将叠氮鞘氨醇4与乙酸酯17缩合，得到糖脂18，将糖脂18直接还原成Bu20P，然后在WSC存在下用十八烷酸酰化。去除保护基产生神经节苷脂GM3（1）。

  DOI：

  10.1016/0008-6215(96)00015-8
• 作为产物：
  描述：

  β-乳糖 在 三氟化硼乙醚 作用下， 生成 ethyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  [EN] MIXTURE OF STEREOISOMERS OF A SULFATED GLYCOLIPID
  [FR] MÉLANGE DE STÉRÉOISOMÈRES D'UN GLYCOLIPIDE SULFATÉ

  摘要：

  A composition comprising a mixture of two or more stereoisomers of a synthetic charged isoprenoid glycolipid of Formula (I), or a pharmaceutically acceptable salt thereof, in which n is 0 or 1, R and R' are independently hydrogen or hydroxyl, each Y is independently hydrogen or a sulfate group, and wherein at least one Y is a sulfate group, and less than 25% of the synthetic charged isoprenoid glycolipid molecules in the mixture comprise an archaeol moiety of the configuration (R)-2,3-bis(((3R,7R,11R)-3,7,11,15-tetramethylhexadecyl)oxy) propan-1-ol. Further provided are archaeosomes and immunogenic compositions comprising the composition,use of the composition as an adjuvant or immunostimulant, and processes for synthesizing the composition.

  公开号：

  WO2023131849A1

文献信息

• Triflic acid-mediated synthesis of thioglycosides
  作者：Samira Escopy、Yashapal Singh、Alexei V. Demchenko

  DOI：10.1039/c9ob01610d

  日期：——

  in the presence of triflic acid is described. The developed protocol features high reaction rates and product yields. Some reactive sugar series give high efficiency in the presence of sub-stoichiometric trifluoromethanesulfonic acid (TfOH) in contrast to other known protocols that require multiple equivalents of Lewis acids to reach high conversion rates.

  描述了在三氟甲磺酸存在下由过乙酸盐有效合成硫代糖苷的方法。制定的协议具有高反应速率和产物收率的特点。与其他化学方法相比，某些反应性糖系列在亚化学计量的三氟甲磺酸（TfOH）的存在下具有很高的效率，而其他已知方法则需要多当量的路易斯酸才能达到高转化率。
• Glycosylation and Pyranose-Furanose Isomerization of Carbohydrates Using HClO₄-SiO₂: Synthesis of Oligosaccharides Containing Galactofuranose
  作者：Anup Misra、Chinmoy Mukherjee

  DOI：10.1055/s-2007-965913

  日期：2007.3

  A series of di- and trisaccharides containing 6-O-linked galactofuranose were synthesized as an anomeric mixture of methyl glycosides using silica-supported perchloric acid.

  一系列含有6-O-连接的呋喃半乳糖的二糖和三糖被合成，它们是以甲基糖苷的异头混合物形式，通过硅胶负载的高氯酸作为催化剂。
• Synthetic Approaches to Novel Archaeal Tetraether Glycolipid Analogues
  作者：Grégory Lecollinet、Rachel Auzély-Velty、Mathieu Danel、Thierry Benvegnu、Grahame Mackenzie、John W. Goodby、Daniel Plusquellec

  DOI：10.1021/jo9822028

  日期：1999.4.1

  Symmetrical and unsymmetrical archaeal tetraether glycolipid analogues have been prepared. The syntheses are based upon the elaboration of lipid cores from versatile chiral starting materials followed by simultaneous or sequential introduction of polar headgroups. Three pathways (A-C) were elaborated for the synthesis of stereochemically defined lipids 14-16 characterized by a straight bridging spacer

  已经制备了对称和不对称的古细菌四醚糖脂类似物。合成是基于从多种手性起始原料精制脂质核心，然后同时或相继引入极性头基。阐述了合成立体化学定义的脂质14-16的三个途径（AC），这些脂质的特征是直连接间隔基和两个分别在sn-3和sn-2位置与甘油单元相连的二氢香茅烷基链。途径C似乎对于合成四醚9特别有利，该四醚9具有在嗜热嗜酸脂质中发现的环戊烷单元。通过二醇14-16与β-D-半乳糖呋喃糖基供体31的反应，以49-53％的产率生产了二糖基化脂质4-6。
• Synthesis and Supramolecular Assemblies of Bipolar Archaeal Glycolipid Analogues Containing a <i>cis</i>-1,3-Disubstituted Cyclopentane Ring
  作者：Mickaëlle Brard、Walter Richter、Thierry Benvegnu、Daniel Plusquellec

  DOI：10.1021/ja049805n

  日期：2004.8.1

  and cryotransmission electron microscopy experiments clearly demonstrated unprecedented glycolipid supramolecular organizations involving two-by-two monolayer associations coupled with interconnection and fusion phenomena. Furthermore, a significant difference in the hydration properties and in the lyotropic liquid crystalline behavior of bipolar lipids 1-2 was found depending on the position of the

  不对称古菌四醚糖脂类似物 1-2 纳入 1,3-二取代环戊烷环进入桥链已被合成。环戊烷以完全受控的顺式构型引入脂族链的中间或甘油单元的三个亚甲基与较大的二糖残基相连。冷冻断裂和低温透射电子显微镜实验清楚地证明了前所未有的糖脂超分子组织，涉及两两单层结合以及互连和融合现象。此外，根据环戊烷残基的位置，发现双极脂质 1-2 的水合特性和溶致液晶行为存在显着差异。
• Modified One‐Pot Protocol for the Preparation of Thioglycosides from Unprotected Aldoses via <i>S</i>‐Glycosyl Isothiouronium Salts
  作者：Pallavi Tiwari、Geetanjali Agnihotri、Anup Kumar Misra

  DOI：10.1080/07328300500256775

  日期：2005.9.1

  An efficient one‐pot protocol for the direct preparation of thioglycosides starting from unprotected reducing sugars via S‐glycosyl isothiouronium salts is reported. In this one‐pot methodology, BF3 · OEt2 has been used as a general catalyst for both per‐O‐acetylation of sugars and conversion of sugar per‐O‐acetates into S‐glycosyl isothiouronium salts, which was allowed to react with alkylating agents

  据报道，一种有效的一锅法方案可直接从未保护的还原糖开始，通过S-糖基异硫脲盐直接制备硫糖苷。在这种一锅法中，BF3·OEt2已被用作糖的全O-乙酰化和糖的过O-乙酸转化为S-糖基异硫脲盐的通用催化剂，该盐可与烷化剂反应在碱的存在下以优异的产率提供硫代糖苷。* CDRI通讯号 6767.作者对这项工作做出了同等的贡献。