phenyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside | 196876-49-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside
• CAS: 196876-49-0
• 化学式: C₃₃H₃₀O₆S
• 分子量: 554.664
• InChiKey: NYWCXRWNDVGZQI-ZTKYUFTRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.43
• 重原子数：
  40.0
• 可旋转键数：
  8.0
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.24
• 拓扑面积：
  63.22
• 氢给体数：
  0.0
• 氢受体数：
  7.0

反应信息

• 作为反应物：
  描述：

  phenyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside 在 palladium on activated charcoal 三氟甲磺酸酐 、 二苯基亚砜 、 2,4,5-tri-tert-butylpyrimidine 、 三氟化硼乙醚 、 氢气 、 对甲苯磺酸 作用下， 以 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 15.0h， 生成 isopropyl 2-O-benzoyl-3-O-[2-azido-4,6-O-benzylidene-3-O-(2,3,5,6-tetra-O-benzoyl-β-D-galactofuranosyl)-2-deoxy-α-D-galactopyranosyl]-4,6-O-[1-(R)-(methoxycarbonyl)-ethylidene]-β-D-galactopyranoside
  参考文献：
  名称：

  A synthetic study towards the PSA1 tetrasaccharide repeating unit

  摘要：

  A synthetic study to the protected tetrasaccharide repeating unit of zwitterionic polysaccharide PSA1 using 1-thio, 1-seleno and 1-hydroxyl functionalized donor glycosides is presented. The ABC trisaccharide part was successfully assembled using an iterative clehydrative glycosylation protocol. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2007.02.067
• 作为产物：
  描述：

  phenyl 3-O-benzyl-1-thio-β-D-galactopyranoside 在 对甲苯磺酸 作用下， 以 吡啶 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 3.0h， 生成 phenyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  莫诺霉素A的全合成

  摘要：

  Moenomycin A 是唯一一种已知的天然抗生素，它通过与催化肽聚糖碳水化合物链形成的转糖基酶结合来抑制细菌细胞壁合成。我们在这里报告了使用亚砜糖基化方法对 moenomycin A 的全合成。分离出一种新发现的亚砜反应副产物，该副产物导致糖基受体的大量损失。介绍了一种抑制这种副产物的通用方法，它使糖基化能够有效地进行。亚砜糖基化的反向添加协议也证明在构建一些糖苷键时必不可少。合成路线灵活，可以构建衍生物以进一步分析莫诺霉素 A 的作用机制。

  DOI：

  10.1021/ja065907x

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
• Study on systematizing the synthesis of the a-series ganglioside glycans GT1a, GD1a, and GM1 using the newly developed N-Troc-protected GM3 and GalN intermediates
  作者：Tatsuya Komori、Akihiro Imamura、Hiromune Ando、Hideharu Ishida、Makoto Kiso

  DOI：10.1016/j.carres.2009.06.009

  日期：2009.8

  A first systematic synthesis of the glycan parts of the a-series gangliosides (GT1a, GD1a, and GM1) utilizing the newly developed N-Troc-protected GM3 and galactosaminyl building blocks is described. The key processes, including the assembly of the GM2 sequence and its conversion into the 3-hydroxy acceptor, were facilitated mainly by the high degree of participation and chemoselective cleavability

  描述了利用新开发的N-Troc保护的GM3和半乳糖胺基结构单元对a系列神经节苷脂（GT1a，GD1a和GM1）的聚糖部分进行的首次系统合成。关键过程，包括GM2序列的组装及其向3-羟基受体的转化，主要是由于半乳糖胺基单元中Troc基团的高度参与性和化学选择性可切割性而促进的。此外，新型GM2受体在与半乳糖基，唾液酸半乳糖基和二唾液酸半乳糖基供体进行糖基化过程中，充当了良好的偶联伴侣，成功地生产了GM1，GD1a和GT1a聚糖。
• Synthetic studies on the carbohydrate moiety of the antigen from the parasite Echinococcusmultilocularis
  作者：Akihiko Koizumi、Noriyasu Hada、Asuka Kaburaki、Kimiaki Yamano、Frank Schweizer、Tadahiro Takeda

  DOI：10.1016/j.carres.2009.02.019

  日期：2009.5

  Stereocontrolled syntheses of branched tri-, tetra-, and pentasaccharides displaying a Gal beta 1 -> 3GalNAc core in the glycan portion of the glycoprotein antigen from the parasite Echinococcus multilocularis have been accomplished. Trisaccharide Gal beta 1 -> 3(GlcNAc beta 1 -> 6)GalNAc alpha 1-OR (A). tetrasaccharide Gal beta 1 -> 3(Gal beta 1 -> 4Gal beta 1 -> 6)GalNac alpha 1-OR(D), and pentasaccharides Gal beta 1 -> 3(Gal beta 1 -> 4Gal beta 1 -> 4Gl cNAc beta 1-6)GalNAc alpha 1-OR (E) and Gal beta 1-3(Gal alpha 1 -> 4Gal alpha 1 -> 4Gal alpha 1 -> 6)GalNAc alpha 1-OR) (F) (R = 2(trimethylsilyl)ethyl) were synthesized by block synthesis. The disaccharide 2-(trimethylsilyl)ethyl 2,3,4,6-tetra-O-acetyl-P-D-galactopyranosyl-(1 -> 3)-2-azido-4-O-benzyl-2-deoxy-alpha-D-galactopyranoside served as a common glycosyl acceptor in the synthesis of the branched oligosaccharicles. Moreover, linear trisaccharide Gal beta 1 -> Gal beta 1 -> 3GalNac alpha 1-OR (B) and branched tetrasaccharide Gal beta 1 -> Gal beta 1 -> 3(GalNac beta 1 -> 6)GalNac alpha 1-OR (C) were synthesized by stepwise condensation. (C) 2009 Elsevier Ltd. All rights reserved.
• Pondering the structural factors that affect 1,2-<i>trans</i>-galactosylation: A lesson learnt from 3-<i>O</i>-β-galactosylation of galactosamine
  作者：Qingjiang Li、Zhongwu Guo

  DOI：10.1080/07328303.2017.1406095

  日期：2017.11.22

  Stereoselective formation of glycosidic bonds remains one of the most challenging topics in carbohydrate chemistry. The predominant method for stereoselective construction of 1,2-trans-glycosidic bonds is through the neighboring group participation effect (NGPE), which proved to be less successful in synthesizing Gal(13)GalNAc disaccharide. The steric effect that overshadows NGPE and the impacts of substituents at the 3-O- and 2-N-positions of donors and acceptors, respectively, on this synthesis were systematically examined to lead to some practical guidelines for choosing protecting groups towards the successful synthesis of Gal(13)GalNAc and similar disaccharides.