2-chloroethyl 2,3,6-tri-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranoside | 120232-83-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-chloroethyl 2,3,6-tri-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranoside
• 英文别名: 2-Chloroethyl beta-D-lactoside heptaacetate；[(2R,3R,4S,5R,6R)-4,5-diacetyloxy-6-(2-chloroethoxy)-3-[(2S,3R,4S,5S,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxyoxan-2-yl]methyl acetate
• CAS: 120232-83-9
• 化学式: C₂₈H₃₉ClO₁₈
• 分子量: 699.06
• InChiKey: KPDNUMYPNIAJKR-HHZNOXSWSA-N

物化性质

• 熔点：
  78-80 °C
• 沸点：
  690.4±55.0 °C(Predicted)
• 密度：
  1.37±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.1
• 重原子数：
  47
• 可旋转键数：
  21
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  221
• 氢给体数：
  0
• 氢受体数：
  18

反应信息

• 作为反应物：
  描述：

  2-chloroethyl 2,3,6-tri-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranoside 在 sodium azide 、 sodium methylate 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 53.0h， 生成 2-azidoethyl β-D-galactopyranosyl-(1->4)-β-D-glucopyranoside
  参考文献：
  名称：

  提供高特异性抗Gal免疫应答的α-Gal三糖表位的设计和合成†

  摘要：

  展示Galα（1,3）Gal表位的碳水化合物抗原可被人类天然存在的抗体识别。这些抗-Gal抗体最多占血清IgG的1％，并被认为是有害的，因为它们会导致超急性器官排斥。为了模拟这种情况，将α（1,3）半乳糖基转移酶敲除小鼠接种Galα（1,3）Gal表位。在我们的研究中，检查了由方酸酯部分连接的由Galα（1,3）Galβ（1,4）GlcNAc或Galα（1,3）Galβ（1,4）Glc组成的两个α-Gal三糖表位是否存在。它们在KO小鼠中引发免疫反应的能力。使用两组分酶促系统合成两个靶标表位，所述酶联体系使用含有用于偶联的接头部分的修饰的二糖底物。尽管两种糖缀合物疫苗均能诱导所需的高抗Gal IgG抗体滴度，但发现该反应对所用的Galα（1,3）Galβ（1,4）GlcNAc半抗原具有极高的特异性，而与Galα（ 1,3）Galβ（1,4）Glc半抗原。我们的发现表明，尽管同质的糖缀合物疫

  DOI：

  10.1039/c7ob00448f
• 作为产物：
  描述：

  2-bromoethyl 4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-2,3,6-tri-O-acetyl-β-D-glucopyranoside 在 sodium iodide 作用下， 以 丙酮 为溶剂， 以100%的产率得到2-chloroethyl 2,3,6-tri-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranoside
  参考文献：
  名称：

  通过表面等离振子共振和NMR光谱监测粘附/生长调节半乳糖凝集素与糖结合物的结合研究

  摘要：

  功能化的荧光聚糖有潜力充当检测和分析蛋白质与碳水化合物相互作用的工具。我们在这里提出一种固定化功能化的简便策略乳糖作为模型二糖。用粘附/生长调节半乳糖凝集素家族的三个成员在不同类型的测定法中测试生物活性，即表面等离振子共振（SPR）中的基质，溶液中的游离配体通过STD / trNOESY和对接测量。在所有情况下，二糖的活性均得以维持。这种新荧光灯的附件糖缀合物与表面的结合形成了明确定义的界面，从而实现了所需的方向灵活性并增强了结合伴侣的接触性。结果表明，这种新糖缀合物 对半乳凝素1、3和3表现出结合亲和力 CG-16。这些半乳凝素和固定化蛋白之间相互作用的动力学分析糖缀合物通过SPR分析得出的半乳糖凝集素-1的K D为1.01 mM，半乳糖凝集素3的K D为83.5μM，而半乳凝素的K D为0.28 mM。CG-16。未检测到与糖苷酸部分的主要接触，这可能会损害与其他头基的结合过程的特异性

  DOI：

  10.1039/b927139b

文献信息

• Conjugates of polyhedral boron compounds with carbohydrates. 1. New approach to the design of selective agents for boron neutron capture therapy of cancer
  作者：A. V. Orlova、A. I. Zinin、N. N. Malysheva、L. O. Kononov、I. B. Sivaev、V. I. Bregadze

  DOI：10.1023/b:rucb.0000019902.98142.33

  日期：2003.12
• Preparation of carbohydrate–oligonucleotide conjugates using the squarate spacer
  作者：Hongbin Yan、Aimé López Aguilar、Yuyan Zhao

  DOI：10.1016/j.bmcl.2007.09.078

  日期：2007.12

  Attachment of carbohydrates to oligonucleotides has proven to induce receptor-mediated endocytosis. A facile method for the formation of covalent linkages between glycans and oligonucleotides is herein described. Thus, use of 3,4-diethoxy-3-cyclobutene-1,2-dione as a linking reagent provides easy conjugation between carbohydrates bearing an amino group at the reducing end and oligonucleotides bearing an aminoalkyl modification. (c) 2007 Elsevier Ltd. All rights reserved.
• Halogeno-alkyl Glycosides. I. Monohalogeno-alkyl Derivatives
  作者：Harold W. Coles、Mary L. Dodds、Frank H. Bergeim

  DOI：10.1021/ja01272a011

  日期：1938.5
• 306. Some new covalent- and ionic-halogen derivatives of cellobiose
  作者：W. M. Corbett、J. Kidd

  DOI：10.1039/jr9590001594

  日期：——
• Synthesis of Aminoethyl Glycosides of the Ganglioside GM₁and Asialo-GM₁Oligosaccharide Chains
  作者：P. E. Cheshev、E. A. Khatuntseva、Yu. E. Tsvetkov、A. S. Shashkov、N. E. Nifantiev

  DOI：10.1023/b:rubi.0000015775.24385.a0

  日期：2004.1

  4'-O-Glycosylation of 2-azidoethyl 2,3,6-tri-O-benzyl-4-O-(2,3-di-O-benzyl-6-O-benzoyl-beta-D-galactopyranosyl)-beta-D-glucopyranoside with a disaccharide donor, 4-trichloroacetamidophenyl 4,6-di-O-acetyl-2-deoxy-3-O-(2,3,4,6-tetra-O-acetyl-beta-D-galactopyranosyl)-1-thio-2-trichloroacetamido-beta-D-galactopyranoside, in dichloromethane in the presence of N-iodosuccinimide and trifluoromethanesulfonic acid resulted in a tetrasaccharide, 2-azidoethyl (2,3,4,6-tetra-O-acetyl-beta-D-(galactopyranosyl)-(1 --> 3)-(4,6-di-O-acetyl-2-deoxy-2-trichloroacetamido-beta-D-galactopyranosyl)-(1 --> 4)-(2,3-di-O-benzyl-6-O-benzoyl-beta-D-galactopyranosyl)-(1 --> 4)-2,3,6-tri-O-benzyl-beta-D-glucopyranoside, in 69% yield. The complete removal of O-protecting groups in the tetrasaccharide, the replacement of N-trichloroacetyl by N-acetyl group, and the reduction of the aglycone azide group to amine led to the target aminoethyl glycoside of beta-D-Gal-(1 --> 3)-beta-D-Gal-NAc-(1 --> 4)-beta-D-Gal-(1 --> 4)-beta-D-Glc-OCH2CH2NH2 containing the oligosaccharide chain of asialo-GM(1) ganglioside in 72% overall yield. Selective 3'-O-glycosylation of 2-azidoethyl 2,3,6-tri-O-benzyl-4-O-(2,6-di-O-benzyl-beta-D-galactopyranosyl)-beta-D-glucopyranoside with thioglycoside methyl (ethyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-2-thio-D-glycero-alpha-D-galacto-2-nonulopyranosyl)oate in acetonitrile in the presence of N-iodosuccinimide and trifluoromethanesulfonic acid afforded 2-azidoethyl [methyl (5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-2-nonulopyranosyl)oate]-(2 --> 3)-2,6-di-O-benzyl-beta-D-galactopyranosyl)-(1 --> 4)-2,3,6-tri-O-benzyl-beta-D-glucopyranoside, the selectively protected derivative of the oligosaccharide chain of GM(3) ganglioside, in 79% yield. Its 4'-O-glycosylation with a disaccharide glycosyl donor, (4-trichloroacetophenyl-4,6-di-O-acetyl-2-deoxy-3-O-(2,3,4,6-tetra-O-acetyl-beta-D-galactopyranosyl) 1-thio-2-trichloroacetamido-beta-D-galactopyranoside in dichloromethane in the presence of N-iodosuccinimide and trifluoromethanesulfonic acid gave 2-azidoethyl (2,3,4,6-tetra-O-acetyl-beta-D-galactopyranosyl)-(1 --> 3)-4,6-di-O-acetyl-2-deoxy-2-trichloroacetamido-beta-D-galactopyranosyl)-(1 --> 4)-[methyl (5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-2-nonulopyranosyl)onate]-(2 --> 3)}-(2,6-di-O-benzyl-beta-D-galactopyranosyl)-(1 --> 4)-2,3,6-tri-O-benzyl-beta-D-glucopyranoside in 85% yield. The resulting pentasaccharide was O-deprotected, its N-trichloroacetyl group was replaced by N-acetyl group, and the aglycone azide group was reduced to afford in 85% overall yield aminoethyl glycoside of beta-D-Gal-(1 --> 3)-beta-D-GalNAc-(1 --> 4)-[alpha-D-Neu5Ac-(2 --> 3)]-beta-D-Gal-(1 --> 4)-beta-D-Glc-OCH2CH2NH2 containing the oligosaccharide chain of GM(1) ganglioside.