2-(trimethylsilyl)ethyl 2-O-benzoyl-4,6-O-benzylidene-β-D-galactopyranoside | 172361-31-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: 2-(trimethylsilyl)ethyl 2-O-benzoyl-4,6-O-benzylidene-β-D-galactopyranoside
• 英文别名: [(2S,4aR,6R,7R,8S,8aR)-8-hydroxy-2-phenyl-6-(2-trimethylsilylethoxy)-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl] benzoate
• CAS: 172361-31-8
• 化学式: C₂₅H₃₂O₇Si
• 分子量: 472.61
• InChiKey: ZQONZVRJJGYZKO-SIRIFCOHSA-N

物化性质

• 沸点：
  590.5±50.0 °C(Predicted)
• 密度：
  1.21±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.77
• 重原子数：
  33
• 可旋转键数：
  8
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  83.4
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  2-(trimethylsilyl)ethyl 2-O-benzoyl-4,6-O-benzylidene-β-D-galactopyranoside 在 吡啶 、 四丁基亚硝酸铵 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 13.33h， 生成 Benzoic acid (2S,4aR,6R,7R,8R,8aS)-2-phenyl-8-trifluoromethanesulfonyloxy-6-(2-trimethylsilanyl-ethoxy)-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl ester
  参考文献：
  名称：

  S-Linked Ganglioside Analogues for Use in Conjugate Vaccines

  摘要：

  Glycosidase resistant thioglycoside precursors of the melanoma-associated ganglioside GM(2) have been synthesized starting from lactose. Syntheses of several analogues of ganglioside GM(3) and a positional isomer have been developed. These compounds contain thio-linked sialic acid residues and a modified ceramide aglycon functionalized for coupling to proteins, surfaces, or matrices. The hydrolytic stability of these oligosaccharides enhances the immunogenicity of the corresponding conjugate vaccines by ensuring their integrity in the acidic compartments of antigen processing cells.

  DOI：

  10.1021/ol036460p
• 作为产物：
  描述：

  2-(trimethylsilyl)ethyl 3-O-p-methoxybenzyl-β-D-galactopyranoside 在 吡啶 、 ammonium cerium(IV) nitrate 、 对甲苯磺酸 作用下， 以 乙腈 为溶剂， 反应 12.92h， 生成 2-(trimethylsilyl)ethyl 2-O-benzoyl-4,6-O-benzylidene-β-D-galactopyranoside
  参考文献：
  名称：

  S-Linked Ganglioside Analogues for Use in Conjugate Vaccines

  摘要：

  Glycosidase resistant thioglycoside precursors of the melanoma-associated ganglioside GM(2) have been synthesized starting from lactose. Syntheses of several analogues of ganglioside GM(3) and a positional isomer have been developed. These compounds contain thio-linked sialic acid residues and a modified ceramide aglycon functionalized for coupling to proteins, surfaces, or matrices. The hydrolytic stability of these oligosaccharides enhances the immunogenicity of the corresponding conjugate vaccines by ensuring their integrity in the acidic compartments of antigen processing cells.

  DOI：

  10.1021/ol036460p

文献信息

• Synthesis and Biological Evaluation of the Forssman Antigen Pentasaccharide and Derivatives by a One-Pot Glycosylation Procedure
  作者：Hiroshi Tanaka、Ryota Takeuchi、Mitsuru Jimbo、Nami Kuniya、Takashi Takahashi

  DOI：10.1002/chem.201203865

  日期：2013.2.25

  The synthesis and biological evaluation of the Forssman antigen pentasaccharide and derivatives thereof by using a one‐pot glycosylation and polymer‐assisted deprotection is described. The Forssman antigen pentasaccharide, composed of GalNAcα(1,3)GalNAcβ(1,3)Galα(1,4)Galβ(1,4)Glc, was recently identified as a ligand of the lectin SLL‐2 isolated from an octocoral Sinularia lochmodes. The chemo‐ and

  描述了通过单锅糖基化和聚合物辅助脱保护对福斯曼抗原五糖及其衍生物的合成和生物学评估。由GalNAcα（1,3）GalNAcβ（1,3）Galα（1,4）Galβ（1,4）Glc组成的Forssman抗原五糖最近被鉴定为从八齿窦中分离的凝集素SLL-2的配体。 lochmodes。通过使用Tf 2 O，TTBP和Ph 2 SO的混合物，将硫代半乳糖苷与半缩醛供体进行化学和α选择性糖基化反应，然后活化剩余的硫代糖苷，在单罐还原端提供三糖程序。五糖是通过N的α选择性糖基化制备的用2-叠氮基-1-羟基糖基供体对Troc保护的（Troc = 2,2,2,3-三氯乙氧基羰基）硫糖苷，然后通过一锅法将得到的二糖在三糖受体的C3羟基上糖基化。接下来，我们将一锅糖基化方法应用于五糖的合成，其中半乳糖胺单元被半乳糖单元部分和完全取代。通过建立的方法成功制备了三种可能的五糖中的Galα（1,3）GalNAc和Galα（1
• Studies on the sialylation of galactoses with different C-5 modified sialyl donors
  作者：Jianzhi Gong、Han Liu、John M. Nicholls、Xuechen Li

  DOI：10.1016/j.carres.2012.08.007

  日期：2012.11

  Synthetic sialylated glycans provide useful tools to study carbohydrate-mediated biological recognition; however chemical sialylation is the most challenging practice in preparative carbohydrate chemistry, which is often associated with low yields and poor stereoselectivity. Herein, we conducted extensive studies on sialylation with five types of 5-N-modified sialyl donors and four types of galactosyl acceptors. Our studies have shown that a good combination between the donor and the acceptor seems necessary to achieve high yield and stereoselectivity. None of the donors or acceptors showed 'universal' utility toward the sialylation reaction. (C) 2012 Elsevier Ltd. All rights reserved.
• First Synthesis of a Pentasaccharide Moiety of Ganglioside GAA-7 Containing Unusually Modified Sialic Acids through the Use of <i>N</i>-Troc-sialic Acid Derivative as a Key Unit
  作者：Hideki Tamai、Hiromune Ando、Hideharu Ishida、Makoto Kiso

  DOI：10.1021/ol303122w

  日期：2012.12.21

  The pentasaccharide part of the potent neuritogenic ganglioside GAA-7 has been synthesized for the first time. The unique branched terminus constituting partially modified sialic acids and N-acetylgalactosamine was successfully established by stereoselective double-sialylation using 8-O-methyl-N-Troc-sialic acid as a donor. The final 4 + 1 coupling reaction provided a high yield of pentasaccharide, which was deprotected to deliver the target molecule.
• <i>S</i>-Linked Ganglioside Analogues for Use in Conjugate Vaccines
  作者：Jamie R. Rich、David R. Bundle

  DOI：10.1021/ol036460p

  日期：2004.3.1

  Glycosidase resistant thioglycoside precursors of the melanoma-associated ganglioside GM(2) have been synthesized starting from lactose. Syntheses of several analogues of ganglioside GM(3) and a positional isomer have been developed. These compounds contain thio-linked sialic acid residues and a modified ceramide aglycon functionalized for coupling to proteins, surfaces, or matrices. The hydrolytic stability of these oligosaccharides enhances the immunogenicity of the corresponding conjugate vaccines by ensuring their integrity in the acidic compartments of antigen processing cells.