(1S,2R,5S)-2-isopropyl-5-methylcyclohexyl 2,3,4,6-tetra-O-benzoyl-β-D-glucopyranoside

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: (1S,2R,5S)-2-isopropyl-5-methylcyclohexyl 2,3,4,6-tetra-O-benzoyl-β-D-glucopyranoside
• 英文别名: (1S,2R,5S)-(+)-1-Menthyl 2,3,4,6-tetra-O-benzoyl-β-D-glucopyranoside；(1S,2R,5S)-(+)-1-mentyl 2,3,4,6-tetra-O-benzoyl-β-D-glucopyranoside；menthyl 2,3,4,6-tetra-O-benzoyl β-D-glucopyranoside；[(2R,3R,4S,5R,6R)-3,4,5-tribenzoyloxy-6-[(1S,2R,5S)-5-methyl-2-propan-2-ylcyclohexyl]oxyoxan-2-yl]methyl benzoate
• 化学式: C₄₄H₄₆O₁₀
• 分子量: 734.843
• InChiKey: PGVGKTOVAJXXEY-XNNCBJHMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.8
• 重原子数：
  54
• 可旋转键数：
  16
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  124
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为产物：
  描述：

  2,3,4,6-tetra-O-benzoyl-D-glucopyranosyl bromide 在 三氟甲磺酸酐 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 生成 (1S,2R,5S)-2-isopropyl-5-methylcyclohexyl 2,3,4,6-tetra-O-benzoyl-β-D-glucopyranoside
  参考文献：
  名称：

  通过远程活化羟基苯并三唑基糖苷产生核苷的糖苷化反应

  摘要：

  羟基苯并三唑因其增加的反应性而通常用于肽化学中，以减少外消旋作用。在本文中，鉴定出非常稳定的羟基苯并三唑基葡糖苷可以进行糖苷化。假设该反应通过Tf 2进行远程激活在HOBt的N3位点为O，接着是被糖基受体攻击的氧碳鎓离子的挤出。此外，两性离子苯并三唑基物质的平衡使离去基团失去竞争性，并产生已被重新转化为糖基供体的核沉子。该反应温和，高产率，快速并且适合于同时含有C2-醚和C2-酯的供体。再生供体糖苷化策略是有前途的，因为它使我们能够再生糖基供体以供进一步利用。通过成功合成HIV1-gp120复合物的支链五聚甘露聚糖核心，证明了该方法在寡糖合成中的实用性。

  DOI：

  10.1021/acs.joc.7b02027

文献信息

• Stable Alkynyl Glycosyl Carbonates: Catalytic Anomeric Activation and Synthesis of a Tridecasaccharide Reminiscent of<i>Mycobacterium tuberculosis</i>Cell Wall Lipoarabinomannan
  作者：Bijoyananda Mishra、Mahesh Neralkar、Srinivas Hotha

  DOI：10.1002/anie.201511695

  日期：2016.6.27

  a challenging task despite the advent of modern glycosidation techniques. Herein, alkynyl glycosyl carbonates are shown to be stable glycosyl donors that can be activated catalytically by gold and silver salts at 25 °C in just 15 min to produce glycosides in excellent yields. Benzoyl glycosyl carbonate donors are solid compounds with a long shelf life. This operationally simple protocol was found to

  尽管现代糖苷化技术的出现，寡糖的合成仍然是一项艰巨的任务。本文中，炔基糖基碳酸酯显示为稳定的糖基供体，其可在25℃下仅15分钟内被金和银盐催化活化，从而以优异的产率产生糖苷。苯甲酰基糖基碳酸酯供体是具有长保存期限的固体化合物。发现该操作简单的方案对于核苷，氨基酸以及酚和叠氮基糖缀合物的合成是高效的。碳酸盐糖苷化方法的重复使用使得十三碳阿拉伯甘露聚糖能够以快速的方式高度收敛地合成。
• Propargyl 1,2-orthoesters as glycosyl donors: stereoselective synthesis of 1,2-trans glycosides and disaccharides
  作者：Gopalsamy Sureshkumar、Srinivas Hotha

  DOI：10.1016/j.tetlet.2007.07.015

  日期：2007.9

  Propargyl 1,2-orthoesters are identified as glycosyl donors. Various glycosides and disaccharides were synthesized in a stereoselective manner using AuBr3 as the promoter. AuBr3 may activate the alkyne resulting in the formation of a 1,2-dioxolenium ion and also behaves as a Lewis acid to facilitate the attack of the glycosyl acceptor. The versatility of the protocol was demonstrated using a panel of aglycones comprising aliphatic, alicyclic, steroidal and sugar alcohols. (C) 2007 Elsevier Ltd. All rights reserved.
• Tetra-O-benzoylglucosylation: A New 1H Nuclear Magnetic Resonance Method for Determination of the Absolute Configuration of Secondary Alcohols
  作者：Mar Trujillo、Ezequiel Q. Morales、Jesus T. Vazquez

  DOI：10.1021/jo00101a023

  日期：1994.11

  A new method for determination of the absolute configuration of secondary alcohols based on the anisotropic effect and glycosylation-induced H-1 NMR shifts is described. The tetra-O-benzoyl-beta-glucosylation of secondary alcohols induces dramatic shifts in the aglycon H-1 NMR peaks. The differences between the proton chemical shifts of the D-glucosylated derivative and the free alcohol (Delta delta = delta(D) - delta(ROH)) or more significantly between their chemical shifts in the D- and L-glucosylated derivatives (Delta delta = delta(D) - delta(L)) are characteristic of the absolute configuration of the secondary chiral alcohol. Furthermore, in most cases the sign of the chemical shift difference of the carbinyl protons correlates with the absolute configuration of their carbons, namely positive or negative Delta delta are obtained for (R)- or (S)-carbinyl carbons, respectively. Moreover, this method involves the use of one enantiomer and generally a single derivatization is sufficient.
• Photoinduced C–S Bond Cleavage of Thioglycosides and Glycosylation
  作者：Run-Ze Mao、Fan Guo、De-Cai Xiong、Qin Li、Jinyou Duan、Xin-Shan Ye

  DOI：10.1021/acs.orglett.5b02823

  日期：2015.11.20

  A glycosyl coupling reaction via photoinduced direct activation of thioglycosides and subsequent O-glycosylation in the absence of photosensitizer was developed for the first time. This reaction underwent a selectively homolytic cleavage of a C-S bond to generate a glycosyl radical, which was oxidized to an oxacarbenium ion by Cu(OTf)(2), and a sequential O-glycosylation. A wide range of glycosides were synthesized in moderate to excellent yield using sugars, amino acids, or cholesterol as the acceptors.
• Nucleofuge Generating Glycosidations by the Remote Activation of Hydroxybenzotriazolyl Glycosides
  作者：Mahesh Neralkar、Bijoyananda Mishra、Srinivas Hotha

  DOI：10.1021/acs.joc.7b02027

  日期：2017.11.3

  by the extrusion of the oxocarbenium ion that was attacked by the glycosyl acceptor. Further, equilibration of the zwitterionic benzotriazolyl species makes the leaving group noncompetitive and generates the nucleofuge that has been reconverted to the glycosyl donor. The reaction is mild, high yielding, fast and suitable for donors containing both C2-ethers and C2-esters as well. The regenerative-donor

  羟基苯并三唑因其增加的反应性而通常用于肽化学中，以减少外消旋作用。在本文中，鉴定出非常稳定的羟基苯并三唑基葡糖苷可以进行糖苷化。假设该反应通过Tf 2进行远程激活在HOBt的N3位点为O，接着是被糖基受体攻击的氧碳鎓离子的挤出。此外，两性离子苯并三唑基物质的平衡使离去基团失去竞争性，并产生已被重新转化为糖基供体的核沉子。该反应温和，高产率，快速并且适合于同时含有C2-醚和C2-酯的供体。再生供体糖苷化策略是有前途的，因为它使我们能够再生糖基供体以供进一步利用。通过成功合成HIV1-gp120复合物的支链五聚甘露聚糖核心，证明了该方法在寡糖合成中的实用性。