benzoxazol-2-yl 2,3,4,6-tetra-O-benzoyl-1-thio-β-D-glucopyranoside | 635727-37-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: benzoxazol-2-yl 2,3,4,6-tetra-O-benzoyl-1-thio-β-D-glucopyranoside
• 英文别名: [(2R,3R,4S,5R,6S)-6-(1,3-benzoxazol-2-ylsulfanyl)-3,4,5-tribenzoyloxyoxan-2-yl]methyl benzoate
• CAS: 635727-37-6
• 化学式: C₄₁H₃₁NO₁₀S
• 分子量: 729.764
• InChiKey: LKPZCIKFJJPJRH-VWJQFIRJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.9
• 重原子数：
  53
• 可旋转键数：
  15
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  166
• 氢给体数：
  0
• 氢受体数：
  12

反应信息

• 作为反应物：
  描述：

  benzoxazol-2-yl 2,3,4,6-tetra-O-benzoyl-1-thio-β-D-glucopyranoside 在 氨 作用下， 以 甲醇 为溶剂， 反应 16.0h， 以80%的产率得到benzoxazol-2-yl 1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  A New Approach to the Synthesis of Benzothiazole, Benzoxazole, and Pyridine Nucleosides as Potential Antitumor Agents

  摘要：

  A modified nitrogen and sulfur glycosylation reaction involving benzothiazole benzoxazole and pyridine nucleoside bases with furanose and pyranose sugars are described. Conformational analysis has been studied by homo- and hetero-nuclear two-dimensional NMR methods (2D DFQ-COSY, HMQC and HMBC). The N and S sites of glycosylation were determined from the H-1, C-13 hetero-nuclear multiple-quantum coherence (HMQC) experiments. All the deprotected nucleosides were tested for their potential antitumor activity.

  DOI：

  10.1081/ncn-120026407
• 作为产物：
  描述：

  benzoxazol-2-yl 2,3,4,6-tetra-O-acetyl-1-thio-β-D-glucopyranoside 在 吡啶 、 甲醇 、 氨 作用下， 反应 16.0h， 生成 benzoxazol-2-yl 2,3,4,6-tetra-O-benzoyl-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  S-苯并恶唑基在寡糖合成中作为稳定的保护基和有效的端基离开基团

  摘要：

  作为开发用于立体选择性糖基化和收敛性寡糖合成的新多功能构件的计划的一部分，我们证明了S-苯并恶唑基（SBox）糖苷对碳水化合物化学中采用的主要保护基操作稳定。另一方面，它们可以在相对温和的反应条件下被糖基化以提供1，2-反式或1，2-顺式连接的二糖。还证明了SBox部分的选择性和化学选择性活化是可行的，这通过合成许多寡糖序列得到证明。

  DOI：

  10.1021/jo071191s

文献信息

• An orthogonal and reactivity-based one-pot glycosylation strategy for both glycan and nucleoside synthesis: access to TMG-chitotriomycin, lipochitooligosaccharides and capuramycin
  作者：Haiqing He、Lili Xu、Roujing Sun、Yunqin Zhang、Yingying Huang、Zixi Chen、Penghua Li、Rui Yang、Guozhi Xiao

  DOI：10.1039/d0sc06815b

  日期：——

  (O-glycosides) and nucleosides (N-glycosides) play important roles in numerous biological processes. Chemical synthesis is a reliable and effective means to solve the attainability issues of these essential biomolecules. However, due to the stereo- and regiochemical issues during glycan assembly, together with problems including the poor solubility and nucleophilicity of nucleobases in nucleoside synthesis, the

  聚糖（ O-糖苷）和核苷（ N-糖苷）在许多生物过程中都发挥着重要作用。化学合成是解决这些重要生物分子的可获得性问题的可靠且有效的手段。然而，由于聚糖组装过程中的立体和区域化学问题，以及核苷合成中核碱基的溶解度和亲核性差等问题，高效合成聚糖和核苷的一锅糖基化策略的开发仍然很差且具有挑战性。在这里，我们报告了第一个基于糖基原-(1-苯基乙烯基)苯甲酸酯的正交和基于反应性的一锅糖基化策略，适用于聚糖和核苷合成。这种一锅糖基化策略不仅继承了先前开发的基于糖基原炔基苯甲酸酯的正交一锅糖基化策略的优点，包括无苷元转移、无离开物种的干扰、无难闻气味等优点，而且高度扩展了糖基化的应用范围。范围（聚糖和核苷）并增加可用于多步一锅合成的离去基团的数量（最多形成四个不同的糖苷键）。 特别是，目前的一锅法糖基化策略已成功应用于一种有前景的结核病药物主角卡普拉霉素的全合成，以及对β- N-乙酰氨基葡萄糖苷酶和重要
• <i>S</i>-Benzoxazolyl (SBox) Glycosides in Oligosaccharide Synthesis: Novel Glycosylation Approach to the Synthesis of β-<scp>d</scp>-Glucosides, β-<scp>d</scp>-Galactosides, and α-<scp>d</scp>-Mannosides
  作者：Alexei Demchenko、Medha Kamat、Cristina De Meo

  DOI：10.1055/s-2003-40345

  日期：——

  Per-acetylated and per-benzoylated S-benzoxazolyl (SBox) glycosides have been synthesized and applied to highly efficient 1,2-trans glycosylation. Complete stereoselectivities and remarkably high yields were achieved for the synthesis of β-d-glucosides, β-d-galactosides, and α-d-mannosides. It was also de­monstrated that benzoylated ‘disarmed’ SBox glycosides could be selectively activated in the presence of both armed and disarmed ethyl thioglycosides. Convergent synthesis of the tetra­saccharide β-d-Glc-(1-6)-β-d-Gal-(1-6)-β-d-GlcNAc-(1-6)-α-d-GlcOMe was achieved in three sequential selective glycosylation steps.

  合乙酰化和合苯甲酰化的S-苯并噁唑基(SBox)糖苷已被合成并应用于高效的1,2-反式糖苷化。对β-d-葡萄糖苷、β-d-半乳糖苷和α-d-甘露糖苷的合成实现了完全的立体选择性和显著高的产率。还证明了苯甲酰化的“去活化”SBox糖苷可以在有活化和去活化的乙硫糖苷同时存在的情况下被选择性激活。成功实现了四糖β-d-Glc-(1-6)-β-d-Gal-(1-6)-β-d-GlcNAc-(1-6)-α-d-GlcOMe的汇聚合成，通过三步连续的选择性糖苷化反应完成。
• Revisiting the Armed−Disarmed Concept Rationale:  <i>S</i>-Benzoxazolyl Glycosides in Chemoselective Oligosaccharide Synthesis
  作者：Medha N. Kamat、Alexei V. Demchenko

  DOI：10.1021/ol050969y

  日期：2005.7.1

  2-O-benzyl-3,4,6-tri-O-acyl SBox glycosides are significantly less reactive than even "disarmed" peracylated derivatives. This finding has been applied to the synthesis of various oligosaccharides, the monomeric units of which are connected via cis-cis, trans-cis, and cis-trans sequential glycosidic linkages. Two-stage activation of the armed (benzylated) donor over moderately (dis)armed (acylated) and, subsequently

  [反应：请参见文字]。已经发现2-O-苄基-3,4,6-三-O-酰基SBox糖苷的反应性甚至比“解除武装的”过酰化衍生物低得多。该发现已应用于合成各种寡糖，其单体单元通过顺式-顺式，反式-顺式和顺式-顺式顺序的糖苷键连接。事实证明，在中等程度的（解除）武装（酰化）以及随后的解除武装的（2-O-苄基-3,4-O-二酰化）受体上的两步活化（苄基化）供体也是可行的。
• Versatile Synthesis and Mechanism of Activation of <i>S</i>-Benzoxazolyl Glycosides
  作者：Medha N. Kamat、Nigam P. Rath、Alexei V. Demchenko

  DOI：10.1021/jo0711844

  日期：2007.8.31

  As a part of a program for developing new efficient procedures for stereoselective glycosylation, a range of S-benzoxazolyl (SBox) glycosides have been synthesized. The mechanistic aspects of the SBox moiety activation for glycosylation via a variety of conceptually different pathways in the presence of thiophilic, electrophilic, or metal-based promoters have been investigated.

  作为开发用于立体选择性糖基化的新有效方法的程序的一部分，已合成了一系列S-苯并恶唑基（SBox）糖苷。已经研究了在存在基于硫的，亲电子的或基于金属的启动子的情况下经由各种概念上不同的途径进行糖基化的SBox部分活化的机械方面。
• Application of Glycosyl Thioimidates in Solid-Phase Oligosaccharide Synthesis
  作者：M. Cristina Parlato、Medha N. Kamat、Haisheng Wang、Keith J. Stine、Alexei V. Demchenko

  DOI：10.1021/jo701902f

  日期：2008.3.1

  S-benzoxazolyl (SBox) and S-thiazolinyl (STaz) glycosides, were investigated as glycosyl donors for solid-phase oligosaccharide synthesis. It was demonstrated that these derivatives are suitable for both glycosyl acceptor-bound and glycosyl donor-bound strategies, commonly employed in resin-supported oligosaccharide synthesis.

  研究了两类稳定的硫代酰亚胺基衍生物，即S-苯并恶唑基（SBox）和S-噻唑啉基（STaz）糖苷，作为固相寡糖合成的糖基供体。已证明这些衍生物既适用于糖基受体结合的策略，也适用于糖基供体结合的策略，通常用于树脂支持的寡糖合成中。