3,4,6-tri-O-acetyl-2-deoxy-2-tetrachlorophthaloylamino-β-D-glucopyranosyl bromide | 180778-38-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 异吲哚及其衍生物
• 英文名称: 3,4,6-tri-O-acetyl-2-deoxy-2-tetrachlorophthaloylamino-β-D-glucopyranosyl bromide
• 英文别名: [(2R,3S,4R,5R,6S)-3,4-diacetyloxy-6-bromo-5-(4,5,6,7-tetrachloro-1,3-dioxoisoindol-2-yl)oxan-2-yl]methyl acetate
• CAS: 180778-38-5
• 化学式: C₂₀H₁₆BrCl₄NO₉
• 分子量: 636.064
• InChiKey: IDKMVYIZIIGFMT-HHACZPCISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  35
• 可旋转键数：
  8
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  126
• 氢给体数：
  0
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  3,4,6-tri-O-acetyl-2-deoxy-2-tetrachlorophthaloylamino-β-D-glucopyranosyl bromide 在 2,6-二叔丁基-4-甲基吡啶 、 三氟甲磺酸三甲基硅酯 、 水 、 sodium methylate 、 silver trifluoromethanesulfonate 、 对甲苯磺酸 、 乙二胺 作用下， 以 甲醇 、 乙醚 、 乙醇 、 二氯甲烷 、 丙酮 、 乙腈 为溶剂， 反应 19.25h， 生成 [(2S,3R,4R,5R,6S)-2-[[(4aR,6S,7R,8R,8aS)-7-acetamido-6-[(2R,3R,4R,5S,6S)-2-methoxy-6-methyl-4,5-bis(phenylmethoxy)oxan-3-yl]oxy-2,2-dimethyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]-4-hydroxy-6-methyl-5-phenylmethoxyoxan-3-yl] acetate
  参考文献：
  名称：

  弗氏志贺氏菌5a O特异性多糖的线性五糖片段的合成及NMR研究

  摘要：

  的线性表位α-d-GLC的甲基糖苷的收敛化学合成p - （1→3）-α-L-鼠李糖p - （1→3）-α-L-鼠李糖p - （1→3） -β-d-GlcNAc的p - （1→2）-α-L-鼠李糖p对应于所述的衍生物（EBCDA）ø的-抗原痢疾杆菌5a血清型进行说明。该策略依赖于制备关键的EB三氯乙酰亚氨酸酯供体和合适的CDA三糖受体。除DA以外，三氯乙酰亚胺化学用于构建所有糖苷键，其中DA是首选的溴化物供体。五糖EBCDA 1 H和13的深入分析1 H NMR谱表明其构象接近天然多糖中相应片段的构象。

  DOI：

  10.1016/s0040-4020(02)00148-5
• 作为产物：
  描述：

  2-氨基-2-脱氧葡萄糖盐酸盐 在 吡啶 、 氢溴酸 、 溶剂黄146 、 三乙胺 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 36.0h， 生成 3,4,6-tri-O-acetyl-2-deoxy-2-tetrachlorophthaloylamino-β-D-glucopyranosyl bromide
  参考文献：
  名称：

  Design and Synthesis of C₃-Symmetric Lewis^X Antigen

  摘要：

  [GRAPHICS]C-3-Symmetric glycoconjugates carrying three equivalent Lewis(x) antigens or beta-lactosides were synthesized from p-nitrophenyl glycosides and trimesic acid via regio- and stereocontrolled glycosylation reactions. An H-1 NMR study has shown that the C-3-symmetric glycoconjugates soluble in water provide useful probes to investigate the Ca2+-dependent Lewis(x)-Lewis(x) association.

  DOI：

  10.1021/ol0351293

文献信息

• In vivo Neutralization of Naturally Existing Antibodies against Linear ?(1,3)-Galactosidic Carbohydrate Epitopes by Multivalent Antigen Presentation: A Solution for the First Hurdle of Pig-to-Human Xenotransplantation
  作者：Rudolf O. Duthaler、Beat Ernst、Reto Fischer、Andreas G. Katopodis、Willy Kinzy、Wolfgang Marterer、Reinhold Oehrlein、Markus B. Streiff、Gebhard Thoma

  DOI：10.2533/chimia.2010.23

  日期：——

  Pig-to-human xenotransplantation of islet cells or of vascularized organs would offer a welcome treatment alternative for the ever-increasing number of patients with end-stage organ failure who are waiting for a suitable allograph. The main hurdle are preexisting antibodies, most of which are specific for 'Linear-B', carbohydrate epitopes terminated by the unbranched Gal-?(1,3)Gal disaccharide. These antibodies are responsible for the 'hyper-acute rejection' of the xenograft by complement mediated hemorrhage. For depletion of such antibodies we have developed an artificial injectable antigen, a glycopolymer (GAS914) with a charge neutral poly-lysine backbone (degree of polymerization n = 1000) and 25% of its side chains coupled to Linear-B-trisaccharide. With an average molecular weight of 400 to 500 kD, presenting 250 trisaccharide epitopes per molecule, this multivalent array binds anti-?Gal antibodies with at least three orders of magnitude higher avidity on a per-saccharide basis than the monomeric epitope. In vivo experiments with non-human primates documented that rather low doses – 1 to 5 mg/kg of GAS914 injected i.v. – efficiently reduce the load of anti-Linear-B antibodies quickly by at least 80%. This treatment can be repeated without any sensitization to GAS914. Interestingly, although the antibody levels start raising 12 h after injection, they do not reach pretreatment levels. The polymer is degraded and excreted within hours, with a minute fraction remaining in lymphoid tissue of anti-?Gal producing animals only, probably binding to and inhibiting antibody-producing B-cells. The results of pig-to-non-human primate xenotransplantations established GAS914 as a relevant therapeutic option for pig-to-human transplantations as well. The synthesis of GAS914 was successfully scaled up to kg amounts needed for first clinical studies. Key was the use of galactosyl transferases and UDP-galactose for the synthesis of the trisaccharide.

  将猪到人体异种移植的胰岛细胞或血管化器官可为等待合适同种移植物的晚期器官功能衰竭患者提供一种受欢迎的治疗选择。主要障碍是已存在的抗体，其中大多数特异性针对以线性-B结尾的半乳糖-半乳糖二糖为终点的碳水化合物表位。这些抗体负责通过补体介导的出血引起的异种移植物的“超急性排斥”。为了清除这些抗体，我们开发了一种人工可注射抗原，一种具有电荷中性的聚赖氨酸骨架（聚合度n = 1000）和其25%的侧链偶联到线性-B三糖的糖聚合物（GAS914）。平均分子量为400至500千道因，每个分子呈现250个三糖表位，这种多价阵列以每糖基的至少三个数量级更高的亲和力结合抗-半乳糖抗体，而不是单体表位。非人灵长类动物的体内实验表明，注射i.v.的GAS914低剂量（1至5毫克/千克）能够迅速将至少80%的抗线性-B抗体负荷有效降低。这种治疗可以反复进行而不会对GAS914产生任何敏感性。有趣的是，尽管抗体水平在注射后12小时开始上升，但并未达到治疗前水平。聚合物在几小时内降解并排出体外，只有极小部分残留在仅产生抗-半乳糖的动物的淋巴组织中，可能与并抑制产生抗体的B细胞结合。猪到非人灵长类动物的异种移植结果将GAS914确立为猪到人体移植的相关治疗选择。GAS914的合成已成功扩大到首次临床研究所需的公斤级数量。关键是使用半乳糖转移酶和UDP-半乳糖合成三糖。
• Design and Synthesis of <i>C</i>₃-Symmetric Lewis^X Antigen
  作者：Yoshihiro Nishida、Tomoaki Tsurumi、Kenji Sasaki、Kenta Watanabe、Hirofumi Dohi、Kazukiyo Kobayashi

  DOI：10.1021/ol0351293

  日期：2003.10.1

  [GRAPHICS]C-3-Symmetric glycoconjugates carrying three equivalent Lewis(x) antigens or beta-lactosides were synthesized from p-nitrophenyl glycosides and trimesic acid via regio- and stereocontrolled glycosylation reactions. An H-1 NMR study has shown that the C-3-symmetric glycoconjugates soluble in water provide useful probes to investigate the Ca2+-dependent Lewis(x)-Lewis(x) association.
• Synthesis and NMR study of a linear pentasaccharide fragment of the Shigella flexneri 5a O-specific polysaccharide
  作者：Laurence A Mulard、Marie-Jeanne Clément、Fabienne Segat-Dioury、Muriel Delepierre

  DOI：10.1016/s0040-4020(02)00148-5

  日期：2002.3

  A convergent chemical synthesis of the methyl glycoside of the linear epitope α-d-Glcp-(1→3)-α-l-Rhap-(1→3)-α-l-Rhap-(1→3)-β-d-GlcNAcp-(1→2)-α-l-Rhap (EBCDA) corresponding to the ramification of the O-antigen of Shigella flexneri serotype 5a is described. The strategy relies on the preparation of a key EB trichloroacetimidate donor and that of an appropriate CDA trisaccharide acceptor. Trichloroacetimidate

  的线性表位α-d-GLC的甲基糖苷的收敛化学合成p - （1→3）-α-L-鼠李糖p - （1→3）-α-L-鼠李糖p - （1→3） -β-d-GlcNAc的p - （1→2）-α-L-鼠李糖p对应于所述的衍生物（EBCDA）ø的-抗原痢疾杆菌5a血清型进行说明。该策略依赖于制备关键的EB三氯乙酰亚氨酸酯供体和合适的CDA三糖受体。除DA以外，三氯乙酰亚胺化学用于构建所有糖苷键，其中DA是首选的溴化物供体。五糖EBCDA 1 H和13的深入分析1 H NMR谱表明其构象接近天然多糖中相应片段的构象。