methyl-6-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-2,3,4-tri-O-benzyl-α-D-glucopyranoside

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl-6-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-2,3,4-tri-O-benzyl-α-D-glucopyranoside
• 英文别名: methyl 2,3,4-tri-O-benzyl-6-O-(3,4,6-tri-O-benzyl-2-azido-2-deoxy-β-D-glucopyranosyl)-α-D-glucopyranoside；methyl 6-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-2,3,6-tri-O-benzyl-α-D-glucopyranoside；methyl (3,4,6-tri-O-benzyl-2-azido-2-deoxy-β-D-glucopyranosyl)-(1→6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；methyl 2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-glucopyranosyl-(1→6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；methyl 6-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；methyl 2,3,4-tri-O-benzyl-6-O-(2-azido-2-deoxy-3,4,6-tri-O-benzyl-D-glucopyranosyl)-α-Dglucopyranoside；(2R,3R,4S,5R,6S)-2-[[(2R,3R,4R,5S,6R)-3-azido-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxymethyl]-6-methoxy-3,4,5-tris(phenylmethoxy)oxane
• 化学式: C₅₅H₅₉N₃O₁₀
• 分子量: 922.088
• InChiKey: HRKQPNNXEGNRPS-TTWHMWBKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9
• 重原子数：
  68
• 可旋转键数：
  24
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  107
• 氢给体数：
  0
• 氢受体数：
  12

反应信息

• 作为产物：
  描述：

  2-azido-3,4,6-tri-O-benzyl-2-deoxy-α-D-glucopyranosyl trichloroacetimidate 在 三氟甲磺酸三甲基硅酯 作用下， 以 二氯甲烷 为溶剂， 反应 1.5h， 生成 methyl-6-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl)-2,3,4-tri-O-benzyl-α-D-glucopyranoside
  参考文献：
  名称：

  A stereocontrolled construction of 2-azido-2-deoxy-1,2-trans-β-glycosidic linkages utilizing 2-azido-2-deoxyglycopyranosyl diphenyl phosphates

  摘要：

  A high-yielding and stereocontrolled construction of 2-azido-2-deoxy-1,2-trans-beta-glycosidic linkages has been achieved by exploiting TMSOTf-promoted 1,2-trans-glycosidation of 2-azido-2-deoxyglycopyranosyl diphenyl phosphates with various glycoside alcohols in propionitrile at -78degreesC. The present method exhibits the highest levels of 1,2-trans-beta-selectivity reported to date for this type of glycosidation. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(03)01557-0

文献信息

• Study of the stereoselectivity of 2-azido-2-deoxyglucosyl donors: protecting group effects
  作者：George Ngoje、Zhitao Li

  DOI：10.1039/c3ob26994a

  日期：——

  A series of tolyl 2-azido-2-deoxy-thio-glucoside donors with different combinations of protecting groups were prepared. These donors were used in glycosylation reactions to test the correlations between the stereoselectivity and the pattern of the protecting groups. Acetyl groups showed a position dependent stereo-directing effect. A remote participating mechanism is proposed to explain the observed results.

  制备了一系列具有不同保护基组合的对甲苯基2-叠氮-2-脱氧硫代葡糖供体。这些供体被用于糖基化反应，以测试立体选择性与保护基模式之间的相关性。乙酰基表现出位置依赖性的立体导向效应。提出了一种远程参与机制，以解释观察到的结果。
• An Air- and Water-Stable Iodonium Salt Promoter for Facile Thioglycoside Activation
  作者：An-Hsiang Adam Chu、Andrei Minciunescu、Vittorio Montanari、Krishna Kumar、Clay S. Bennett

  DOI：10.1021/ol5004059

  日期：2014.3.21

  iodonium salt phenyl(trifluoroethyl)iodonium triflimide is shown to activate thioglycosides for glycosylation at room temperature. Both armed and disarmed thioglycosides rapidly undergo glycosylation in 68–97% yield. The reaction conditions are mild and do not require strict exclusion of air and moisture. The operational simplicity of the method should allow experimentalists with a limited synthetic background

  空气和水稳定的碘鎓盐苯基（三氟乙基）碘鎓三氟甲磺酰亚胺在室温下可激活硫代糖苷以进行糖基化。武装和解除武装的硫糖苷都以 68-97% 的产率迅速进行糖基化。反应条件温和，不需要严格排除空气和水分。该方法的操作简单性应该允许具有有限合成背景的实验者构建糖苷键。
• Glycosylation Reactions Using Phenyl(trifluoroethyl)iodonium Salts
  申请人：Trustees of Tufts College

  公开号：US20150099870A1

  公开（公告）日：2015-04-09

  Provided are methods for the preparation of glycosylation products, including those represented by formula I: Sugar-O—R′  I comprising the step of combining R′—OH, a glycosyl sulfide glycosyl donor (“thioglycoside donor”), a hypervalent iodine alkyl-transfer activating reagent, and a base. In an embodiment, the hypervalent iodine alkyl-transfer activating reagent is (phenyl(trifluoroethyl)iodonium triflimide).

  提供了制备糖基化产物的方法，包括由式I表示的那些： 糖-O—R′  I 包括将R′—OH、糖基硫醚糖基供体（“硫代糖苷供体”）、高价碘烷基转移活化试剂和碱结合的步骤。在一种实施例中，高价碘烷基转移活化试剂为（苯基(三氟乙基)碘三氟甲磺酰胺）。
• A flexible 1,2-cis α-glycosylation strategy based on in situ adduct transformation
  作者：Jhe-Cyuan Hu、Ai-Fen Wendy Feng、Bo-Yao Chang、Chun-Hung Lin、Kwok-Kong Tony Mong

  DOI：10.1039/c7ob00839b

  日期：——

  strategy for a wide range of glycosyl donors and acceptors has been developed, which is based on an in situ adduct transformation protocol. Based on this strategy, both NFM-derived and iodide covalent adducts can be accessed for glycosylation. Using low temperature NMR spectroscopy, the aforementioned glycosyl adducts were detected.

  已经开发了一种针对多种糖基供体和受体的灵活的1,2-顺式α-选择性糖基化策略，该策略基于原位加合物转化方案。基于此策略，可以获取NFM衍生品和碘化物共价加合物进行糖基化。使用低温NMR光谱法，检测到上述糖基加合物。
• Automated Quantification of Hydroxyl Reactivities: Prediction of Glycosylation Reactions
  作者：Chun‐Wei Chang、Mei‐Huei Lin、Chieh‐Kai Chan、Kuan‐Yu Su、Chia‐Hui Wu、Wei‐Chih Lo、Sarah Lam、Yu‐Ting Cheng、Pin‐Hsuan Liao、Chi‐Huey Wong、Cheng‐Chung Wang

  DOI：10.1002/anie.202013909

  日期：2021.5.25

  (Aka) to quantify the nucleophilicity of hydroxyl groups in glycosylation influenced by the steric, electronic and structural effects, providing a connection between experiments and computer algorithms. The subtle reactivity differences among the hydroxyl groups on various carbohydrate molecules can be defined by Aka, which is easily accessible by a simple and convenient automation system to assure

  糖基化反应的立体选择性和产率至关重要，但不可预测。我们已经开发了一个亲核亲核常数（Aka）数据库，用于量化受空间，电子和结构效应影响的糖基化中羟基的亲核性，从而在实验和计算机算法之间建立联系。各种碳水化合物分子上的羟基之间的细微反应性差异可以由Aka定义，Aka可以通过简单便捷的自动化系统轻松访问，以确保高重现性和准确性。通过设计的软件程序“ GlycoComputer”可以组织和处理各种具有明确反应性和启动子的糖基化供体和受体，从而无需复杂的计算过程即可预测糖基化反应。通过随机森林算法进一步验证了Aka的重要性，并通过合成Lewis A骨架测试了适用性，表明可以准确估计立体选择性和产率。