1,2,3,4-tetra-O-acetyl-D-glucose | 65620-65-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 1,2,3,4-tetra-O-acetyl-D-glucose
• 英文别名: 1,2,3,4-tetra-O-acetyl-D-glucopyranose；1,2,3,4-tetra-O-acetylglucopyranose；(3R,4S,5R,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate；[(2R,3R,4S,5R)-4,5,6-triacetyloxy-2-(hydroxymethyl)oxan-3-yl] acetate
• CAS: 65620-65-7
• 化学式: C₁₄H₂₀O₁₀
• 分子量: 348.307
• InChiKey: FEQXFAYSNRWXDW-RQICVUQASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.1
• 重原子数：
  24
• 可旋转键数：
  9
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.71
• 拓扑面积：
  135
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  1,2,3,4-tetra-O-acetyl-D-glucose 在 咪唑 作用下， 以 吡啶 为溶剂， 反应 2.0h， 生成 2,3,4-tri-O-acetyl-6-O-benzoylglucosyl bromide
  参考文献：
  名称：

  Rapid Preparation of Variously Protected Glycals Using Titanium(III)

  摘要：

  Glycosyl chlorides and bromides can be rapidly converted to glycals in high yield by reaction with (Cp2Ti[III]Cl)(2). This reagent tolerates a wide range of common carbohydrate protecting groups, including silyl ethers, acetals, and esters; the methodology provides a general route for the preparation of glycals substituted with both acid- and base-labile functionality. A reaction mechanism is proposed that is based on heteroatom abstraction to give an intermediate glycosyl radical. This radical reacts with a second equivalent of Ti(III) to yield a glycosyltitanium(IV) species. P-Heteroatom elimination from the glycosyltitanium(IV) complex gives the glycal.

  DOI：

  10.1021/jo982447k
• 作为产物：
  描述：

  1,2,3,4,6-alpha-D-葡萄糖五乙酸酯 在 二氯二茂锆 、 二异丁基氢化铝 作用下， 以 四氢呋喃 为溶剂， 以87%的产率得到1,2,3,4-tetra-O-acetyl-D-glucose
  参考文献：
  名称：

  C=O键的锆催化氢铝化：全乙酰化化合物的位点选择性脱-O-乙酰化和机理洞察

  摘要：

  本文报道了一种前所未有的由二氯化锆催化的 C = O 键的氢铝化，并应用于全乙酰化功能底物的位点选择性脱保护。具有 1:1 锆/铝化学计量比的混合金属氢化物也显示为还原物质。最终为这种转化提出了一种催化循环，这在锆催化领域是没有先例的。

  DOI：

  10.1021/acs.joc.1c00060

文献信息

• Camptothecin derivatives and improved synthetic methods
  申请人：Shull Keith Brian

  公开号：US20070099948A1

  公开（公告）日：2007-05-03

  The present invention relates to compositions and methods for preparing pharmaceutical compositions. In some embodiments, the invention includes compounds and methods of resolving chiral compounds. In some embodiments, the invention includes chiral and crystalline compositions and hydrates. In some embodiments, the invention contemplates compositions comprising camptothecin derivatives and synthetic intermediates thereof. In some embodiments, the invention includes methods of protecting, inserting, modifying, separating isomers, and removing chemical groups.

  本发明涉及制备药物组合物的组合物和方法。在某些实施例中，该发明包括化合物和解决手性化合物的方法。在某些实施例中，该发明包括手性和晶体组合物和水合物。在某些实施例中，该发明考虑包括紫杉醇衍生物及其合成中间体的组合物。在某些实施例中，该发明包括保护、插入、修改、分离异构体和去除化学基团的方法。
• [EN] SYNTHESIS AND USE OF GLYCOSIDE PRO-DRUG ANALOGS<br/>[FR] SYNTHÈSE ET UTILISATION D'ANALOGUES GLYCOSIDES DE PROMÉDICAMENT
  申请人：NUTEK PHARMA LTD

  公开号：WO2012142141A1

  公开（公告）日：2012-10-18

  The present invention relates to methods and compositions for the synthesis, production, and use of pro-drug analogs. This invention relates to a method for the production of a broad group of glycosylated drugs, including but not limited to propofol, acetaminophen, and camptothecin carbohydrate derivatives.

  本发明涉及用于合成、生产和使用前药类似物的方法和组合物。本发明涉及一种用于生产包括但不限于丙泊酚、对乙酰氨基酚和喜树碱糖衍生物在内的广泛群体的糖基药物的方法。
• Excited-State Palladium-Catalyzed 1,2-Spin-Center Shift Enables Selective C-2 Reduction, Deuteration, and Iodination of Carbohydrates
  作者：Gaoyuan Zhao、Wang Yao、Jaclyn N. Mauro、Ming-Yu Ngai

  DOI：10.1021/jacs.0c11209

  日期：2021.2.3

  Excited-state catalysis, a process that involves one or more excited catalytic species, has emerged as a powerful tool in organic synthesis because it allows access to the excited-state reaction landscape for the discovery of novel chemical reactivity. Herein, we report the first excited-state palladium-catalyzed 1,2-spin-center shift reaction that enables site-selective functionalization of carbohydrates

  激发态催化是一种涉及一种或多种激发态催化物质的过程，已成为有机合成中的强大工具，因为它允许进入激发态反应景观以发现新颖的化学反应性。在此，我们报告了第一个激发态钯催化的 1,2-自旋中心转移反应，该反应能够实现碳水化合物的位点选择性功能化。该策略的特点是反应条件温和，具有高水平的区域和立体选择性，可耐受多种官能团和复杂的分子结构。机理研究表明，一种根本机制涉及杂合钯物种的形成，该杂合钯物种经历1,2-自旋中心转移，然后进行还原、氘化和碘化，以提供功能化的2-脱氧糖。新的反应性将为快速生成天然和非天然碳水化合物提供通用方法。
• Methods And Systems For Growing Plants Using Silicate-Based Substrates, Cultivation Of Enhanced Photosynthetic Productivity And Photosafening By Utilization Of Exogenous Glycopyranosides For Endogenous Glycopyranosyl-Protein Derivatives, And Formulations, Processes And Systems For The Same
  申请人：Innovation Hammer, LLC

  公开号：US20140331555A1

  公开（公告）日：2014-11-13

  Methods for promoting plant growth based on novel photosafening treatment regimes with glycopyranosides including glycopyranosylglycopyranosides, and aryl-a-D-glycopyranosides, and more specifically, with one or more compounds comprising terminal mannosyl-triose, optionally in the presence of light enhanced by one or more light reflecting and/or refracting members such as silicon-based substrates. Furthermore, chemical synthesis processes for the above compounds are disclosed for general application to plants. Silicate microbeads of the like are distributed over the ground or substrate in which roots of a plant are supported and planted, beneath and around a plant in a manner that light is refracted or reflected toward the phylloplane.

  基于新型光保护处理方案促进植物生长的方法，包括甘露聚糖苷类化合物，如甘露聚糖苷和芳基-a-D-甘露聚糖苷，更具体地，使用含有端基甘露三糖的一个或多个化合物，可选地在存在硅基基底等一个或多个反射和/或折射光的成员的情况下增强光线。此外，还公开了上述化合物的化学合成过程，以供普遍应用于植物。类似的硅酸盐微珠分布在植物的根部支撑和种植的地面或基质上，在植物的下方和周围，使光线以折射或反射的方式朝向叶面。
• Nickel-Catalyzed Radical Migratory Coupling Enables C-2 Arylation of Carbohydrates
  作者：Gaoyuan Zhao、Wang Yao、Ilia Kevlishvili、Jaclyn N. Mauro、Peng Liu、Ming-Yu Ngai

  DOI：10.1021/jacs.1c03563

  日期：2021.6.16

  concerted 1,2-acyloxy rearrangement via a cyclic five-membered-ring transition state followed by nickel-catalyzed carbon–carbon bond formation. The novel reactivity provides an efficient route to valuable C-2-arylated carbohydrate mimics and building blocks, allows for new strategic bond disconnections, and expands the reactivity profile of nickel catalysis.

  镍催化为解决有机合成中未解决的挑战提供了令人兴奋的机会。在这里，我们报告了第一个镍催化自由基迁移交叉偶联反应，用于从容易获得的 1-溴糖和芳基硼酸直接制备 2-芳基-2-脱氧糖苷。该反应具有广泛的底物范围，并耐受广泛的官能团和复杂的分子结构。初步的实验和计算研究表明，1,2-酰氧基通过环状五元环过渡态进行协同重排，然后形成镍催化的碳-碳键。新的反应性为有价值的 C-2-芳基化碳水化合物模拟物和结构单元提供了一条有效途径，允许新的战略键断开，并扩展了镍催化的反应性特征。