2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl trichloroacetimidate | 146919-08-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl trichloroacetimidate
• 英文别名: [(2S,3R,4R,5S,6R)-3-azido-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl] 2,2,2-trichloroethanimidate
• CAS: 146919-08-6
• 化学式: C₂₉H₂₉Cl₃N₄O₅
• 分子量: 619.932
• InChiKey: UNTPMXAMWXTTHZ-ACFIUOAZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7
• 重原子数：
  41
• 可旋转键数：
  13
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  84.4
• 氢给体数：
  1
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl trichloroacetimidate 在 tetrafluoroboric acid 、 三氟甲磺酸三甲基硅酯 、 3 A molecular sieve 、 sodium hydride 、 二正丁基氧化锡 、 cesium fluoride 、 三氟乙酸 、 potassium iodide 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 5.0h， 生成 1-D-6-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-α-D-glucopyranosyl)-2,3,4,5-tetra-O-benzyl-myo-inositol
  参考文献：
  名称：

  Synthesis of a partially protected 1d-6-O-(2-azido-2-deoxy-α-d-glucopyranosyl)-myo-inositol: a useful precursor of glycosylphosphatidylinositols and related compounds

  摘要：

  DOI：

  10.1016/0008-6215(95)00012-i
• 作为产物：
  描述：

  2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-glucopyranose 、 三氯乙腈 在 potassium carbonate 作用下， 以 二氯甲烷 为溶剂， 反应 4.0h， 以54%的产率得到2-azido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranosyl trichloroacetimidate
  参考文献：
  名称：

  Synthesis of a partially protected 1d-6-O-(2-azido-2-deoxy-α-d-glucopyranosyl)-myo-inositol: a useful precursor of glycosylphosphatidylinositols and related compounds

  摘要：

  DOI：

  10.1016/0008-6215(95)00012-i

文献信息

• A Study on the Influence of the Structure of the Glycosyl Acceptors on the Stereochemistry of the Glycosylation Reactions with 2-Azido-2-Deoxy-Hexopyranosyl Trichloroacetimidates
  作者：M. Belén Cid、Francisco Alfonso、Manuel Martín-Lomas

  DOI：10.1002/chem.200400746

  日期：2005.1.21

  relative influence of these factors is difficult to evaluate. For a given set of experimental conditions, the stereochemical course of these glycosylations depends on structural features of both glycosyl donor and glycosyl acceptor. It is a balance of these factors, where the structure of the glycosyl donor always plays a major role, which determines the stereochemistry of the coupling reaction. Therefore

  通过使用一系列手性肌醇衍生物作为糖基受体，研究了以2-叠氮基-2-脱氧-D-葡萄糖-和D-吡喃半乳糖基三氯乙酰亚氨酸酯作为糖基供体的糖基化的立体化学结果。糖基受体的绝对构型，构象和构象柔韧性的影响已通过在相似的预先建立的实验条件下使用不同的糖基供体进行了研究。尽管受体的结构可能在支配这些糖基化的立体化学中起一定作用，但结果表明，总的来说，这些因素的相对影响难以评估。对于给定的一组实验条件，这些糖基化的立体化学过程取决于糖基供体和糖基受体的结构特征。这些因素之间的平衡是糖基供体的结构始终起主要作用的地方，它决定了偶联反应的立体化学。因此，文献中报道的其中糖基受体的结构对于确定反应的立体化学至关重要的实施例构成了特别有利的情况，目前尚无进一步的概括。
• Probing the substrate specificity of<i>Trypanosoma brucei</i>GlcNAc-PI de-<i>N</i>-acetylase with synthetic substrate analogues
  作者：Amy S. Capes、Arthur Crossman、Michael D. Urbaniak、Sophie H. Gilbert、Michael A. J. Ferguson、Ian H. Gilbert

  DOI：10.1039/c3ob42164c

  日期：——

  brucei GlcNAc-PI de-N-acetylase. However, this compound became sensitive to the stereochemistry of the glycoside linkage (the β-anomer was neither substrate or inhibitor) and the structure of the lipid moiety (the hexadecyl derivatives were inhibitors). Chemistry was successfully developed to replace the phosphate with a sulphonamide, but the compound was neither a substrate or an inhibitor, confirming

  1- D- (2-氨基-2-脱氧-α- D-吡喃葡萄糖基) -myo-肌醇1-(1,2-di- O -hexadecanoyl - sn-甘油3-磷酸)的一系列合成类似物，由D-肌醇、D - Glc p N 或磷脂成分的 7 种变体组成，作为 GlcNAc-PI de-N-乙酰化酶的底物和抑制剂进行了制备和测试，GlcNAc-PI de- N-乙酰化酶是一种基因验证的药物靶酶，负责布氏锥虫糖基磷脂酰肌醇 (GPI) 生物合成途径的第二步。D - myo _生理底物中的-肌醇被环己二醇成功取代，仍然是布氏杆菌GlcNAc-PI de- N的底物-乙酰化酶。然而，该化合物对糖苷键的立体化学（β-异头物既不是底物也不是抑制剂）和脂质部分的结构（十六烷基衍生物是抑制剂）变得敏感。化学成功地用磺胺代替磷酸盐，但该化合物既不是底物也不是抑制剂，证实了磷酸盐对分子识别的重要性。我们还用无环类似物代替了氨
• A versatile strategy for the synthesis of complex type N-Glycans: Synthesis of diantennary and bisected diantennary oligosaccharides
  作者：Sven Weiler、Richard R. Schmidt

  DOI：10.1016/s0040-4039(98)00246-9

  日期：1998.4

  Based on readily available glucose, 2-azido-glucose, mannose, and N-phthaloyllactosamine building blocks 5, 6, 8, and 13 a highly versatile strategy for the synthesis of complex type and bisected complex type N-glycan residues is established; this is demonstrated for the synthesis of nonasaccharide 1 and decasaccharide 2, respectively. The glucose residue 5 finally provides regioselective access to

  基于容易获得的葡萄糖，2-叠氮基葡萄糖，甘露糖，和Ñ -phthaloyllactosamine积木5，6，8，和13高度通用的策略的复杂类型的合成和等分的复合型Ñ聚糖残基被建立; 这被证明分别用于合成九糖1和十糖2。葡萄糖残基5最后提供对3-，4-和/或6-羟基的区域选择性进入以进行天线附着，引入二等分的N-乙酰氨基葡糖残基和在C-2上差向异构化以产生所需的β-连接的甘露糖基残基c。
• Synthesis of DTPA-conjugated (1,4)-linked 2-aminoglycosides varying in the anomeric configuration and their MRI contrast effect
  作者：Hiroshi Tanaka、Yoshio Ando、Masatoshi Wada、Takashi Takahashi

  DOI：10.1039/b507824e

  日期：——

  We describe the efficient synthesis of DTPA-conjugated oligosaccharides composed of α- and/or β-linked tri to monoglucosamines. Gd(III) complex with DTPA-conjugated chitotriitol 1 has been reported to be an effective MRI contrast agent. In order to elucidate the structure–property relationships, we planned to synthesize the DTPA-conjugated 2-amino-tri-, di-, and monosaccharides varying in configuration at the anomeric positions and the C2 position on the reducing end. Our strategy for the synthesis of the DTPA-conjugated oligosaccharides involves O-perbenzyl protected 2-amino-tri-, di-, and monosaccharides as key intermediates. The 2-aminoglycosides were prepared by non-selective glycosidation of 2-azido-2-deoxyglycosyl donors, followed by separation of two anomeric isomers. Although the synthesis involves separation of the stereoisomers, it circumvents not only the careful tuning of reaction conditions, but also the time-consuming preparation of glycosyl donors attached to different protecting groups. The protected 2-aminoglycosides were converted to the fully deprotected DTPA-conjugated tri- to monosaccharides by the same operation. MRI phantom study using the Gd(III) complexes of DTPA-conjugated oligosaccharides indicates that the number of the monosaccharide units was critical for enhancing the relative signal intensity of water protons per Gd, and various stereoisomers would be candidate scaffolds for MRI contrast agents.

  我们描述了由α-和/或β-连接的三葡糖胺与单葡糖胺组成的 DTPA 共轭寡糖的高效合成。据报道，Gd（III）与 DTPA 共轭壳三醇 1 的复合物是一种有效的磁共振成像造影剂。为了阐明其结构-性质关系，我们计划合成 DTPA 键合的 2-氨基三糖、二糖和单糖，它们在异构体位置和还原端 C2 位置的构型各不相同。我们合成 DTPA 共轭寡糖的策略是以 O-perbenzyl 保护的 2-氨基三糖、二糖和单糖为关键中间体。2-aminoglycosides 是通过 2-azido-2-deoxyglycosyl 给体的非选择性糖苷化反应制备的，然后分离出两种异构体。虽然这种合成方法涉及立体异构体的分离，但它不仅避免了对反应条件的精心调整，还避免了制备连接不同保护基团的糖基供体的耗时过程。通过同样的操作，受保护的 2-氨基糖苷被转化为完全去保护的 DTPA 共轭三糖和单糖。使用 DTPA 共轭低聚糖的 Gd(III) 复合物进行的磁共振成像模型研究表明，单糖单元的数量对于增强每个 Gd 的水质子的相对信号强度至关重要，各种立体异构体将成为磁共振成像造影剂的候选支架。
• A highly stereoselective construction of 1,2-trans-β-glycosidic linkages capitalizing on 2-azido-2-deoxy-d-glycosyl diphenyl phosphates as glycosyl donors
  作者：Toshifumi Tsuda、Seiichi Nakamura、Shunichi Hashimoto

  DOI：10.1016/j.tet.2004.08.076

  日期：2004.11

  The scope of TMSOTf-promoted glycosidation of 2-azido-2-deoxyglycopyranosyl diphenyl phosphates is investigated. The 3,4,6-tri-O-benzyl-protected glucosyl and galactosyl donors and the 4,6-O-benzylidene-protected galactosyl donor each react with a range of acceptor alcohols in the presence of a stoichiometric amount of TMSOTf in propionitrile at -78 degreesC to afford 1,2-trans-beta-linked disaccharides in high yields with alpha:beta ratios ranging from 9:91 to 1: > 99, regardless of the anomeric composition of the donor used. The use of propionitrile as a solvent at -78 degreesC has proven to be among the best choice for the highest levels of beta-selectivity reported to date for this type of glycosidation. A plausible reaction mechanism, which features a large equilibrium preference for alpha-glycosyl-nitrilium ions over beta-nitrilium ions, is proposed based on byproducts formed through their intermediacy and accounts for the observed excellent beta-selectivities. (C) 2004 Elsevier Ltd. All rights reserved.