1,6-anhydro-2,3,4,7-tetra-O-benzyl-L-glycero-β-D-manno-heptopyranose | 215381-41-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 1,6-anhydro-2,3,4,7-tetra-O-benzyl-L-glycero-β-D-manno-heptopyranose
• 英文别名: (1R,2S,3S,4S,5R,7S)-2,3,4-tris(phenylmethoxy)-7-(phenylmethoxymethyl)-6,8-dioxabicyclo[3.2.1]octane
• CAS: 215381-41-2
• 化学式: C₃₅H₃₆O₆
• 分子量: 552.667
• InChiKey: IWJDIVWZITVUGF-QHXLDJMASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.4
• 重原子数：
  41
• 可旋转键数：
  13
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  55.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  1,6-anhydro-2,3,4,7-tetra-O-benzyl-L-glycero-β-D-manno-heptopyranose 在 palladium on activated charcoal 2,4,6-三甲基吡啶 、 氢气 、 对甲苯磺酸 作用下， 以 乙醇 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， -78.0~25.0 ℃ 、810.6 kPa 条件下， 反应 16.25h， 生成 7-O-acetyl-1,6-anhydro-2,3-O-isopropylidene-L-glycero-β-D-manno-heptopyranose
  参考文献：
  名称：

  Synthesis of a Branched Heptose- and Kdo-Containing Common Tetrasaccharide Core Structure of Haemophilus influenzae Lipopolysaccharides via a 1,6-Anhydro-l-glycero-β-d-manno-heptopyranose Intermediate

  摘要：

  The synthesis of a common tetrasaccharide core structure of Haemophilus influenzae lipopolysaccharides, beta-D-glucopyranosyl-(1-->4)-[L-glycero-alpha-D-manno-heptopyranosyl-(1-->3)]-L-glycero-alpha-D-manno-heptopyranosyl-(1-->5)-3-deoxy-alpha-D-manno-octulopyranoside and the trisaccharide beta-D-glucopyranosyl-(1-->4)-[L-glycero-alpha-D-manno-heptopyranosyl-(1-->3)]-L-glycero-alpha-D-manno-heptopyranoside is described. The oligosaccharides are synthesized as glycosides of a bifunctional spacer, 2-(4-aminophenyl)ethanol, to allow the subsequent formation of immunogenic glycoconjugates, which will be evaluated as well-defined glycoconjugate vaccine candidates. The syntheses of the 3,4-branched structures were accomplished using a 1,6-anhydro-L-glycero-beta-D-manno-heptopyranose intermediate to diminish the steric crowding between the 3- and 1-substituent. This intermediate was effectively synthesized from a mannose precursor via a stereoselective one-carbon elongation using a Barbier reaction (which was found to be more convenient than a Grignard reaction) and anhydro bridge formation through an internal glycosylation of a 6-O-trimethylsilylated ethyl thioheptoside using NIS/TfOH as a promoter. The 3- and 4-substituent were readily introduced into the 1,6-anhydro intermediate by glycosylation reactions using thioglycosides as donors and NIS/TfOH as a promoter, a task which has not been possible using accepters with equatorial 3,4-substituents. Acetolysis of the anhydro bridge followed by conversion into the ethyl thioglycoside afforded a trisaccharide donor, which, in NIS/TfOH-promoted couplings to the spacer and to a Kdo acceptor followed by deprotection, efficiently gave the two target compounds.

  DOI：

  10.1021/jo9808573
• 作为产物：
  描述：

  ethyl 2,3,4,7-tetra-O-benzyl-1-thio-L,D-glycero-α-D-manno-heptopyranoside 在 吡啶 、 N-碘代丁二酰亚胺 、 三氟甲磺酸 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 1.92h， 生成 1,6-anhydro-2,3,4,7-tetra-O-benzyl-L-glycero-β-D-manno-heptopyranose
  参考文献：
  名称：

  Synthesis of a Branched Heptose- and Kdo-Containing Common Tetrasaccharide Core Structure of Haemophilus influenzae Lipopolysaccharides via a 1,6-Anhydro-l-glycero-β-d-manno-heptopyranose Intermediate

  摘要：

  The synthesis of a common tetrasaccharide core structure of Haemophilus influenzae lipopolysaccharides, beta-D-glucopyranosyl-(1-->4)-[L-glycero-alpha-D-manno-heptopyranosyl-(1-->3)]-L-glycero-alpha-D-manno-heptopyranosyl-(1-->5)-3-deoxy-alpha-D-manno-octulopyranoside and the trisaccharide beta-D-glucopyranosyl-(1-->4)-[L-glycero-alpha-D-manno-heptopyranosyl-(1-->3)]-L-glycero-alpha-D-manno-heptopyranoside is described. The oligosaccharides are synthesized as glycosides of a bifunctional spacer, 2-(4-aminophenyl)ethanol, to allow the subsequent formation of immunogenic glycoconjugates, which will be evaluated as well-defined glycoconjugate vaccine candidates. The syntheses of the 3,4-branched structures were accomplished using a 1,6-anhydro-L-glycero-beta-D-manno-heptopyranose intermediate to diminish the steric crowding between the 3- and 1-substituent. This intermediate was effectively synthesized from a mannose precursor via a stereoselective one-carbon elongation using a Barbier reaction (which was found to be more convenient than a Grignard reaction) and anhydro bridge formation through an internal glycosylation of a 6-O-trimethylsilylated ethyl thioheptoside using NIS/TfOH as a promoter. The 3- and 4-substituent were readily introduced into the 1,6-anhydro intermediate by glycosylation reactions using thioglycosides as donors and NIS/TfOH as a promoter, a task which has not been possible using accepters with equatorial 3,4-substituents. Acetolysis of the anhydro bridge followed by conversion into the ethyl thioglycoside afforded a trisaccharide donor, which, in NIS/TfOH-promoted couplings to the spacer and to a Kdo acceptor followed by deprotection, efficiently gave the two target compounds.

  DOI：

  10.1021/jo9808573

文献信息

• Convergent Synthesis of 4-<i>O</i>-Phosphorylated <scp>l</scp>-<i>glycero</i>-<scp>d</scp>-<i>manno</i>-Heptosyl Lipopolysaccharide Core Oligosaccharides Based on Regioselective Cleavage of a 6,7-<i>O</i>-Tetraisopropyldisiloxane-1,3-diyl Protecting Group
  作者：Christian Stanetty、Martin Walter、Paul Kosma

  DOI：10.1021/jo402312x

  日期：2014.1.17

  The structurally conserved lipopolysaccharide core region of many Gram-negative bacteria is composed of trisaccharides containing 4-O-phosphorylated l-glycero-d-manno-heptose (l,d-Hep) units, which act as ligands for antibodies and lectins. The disaccharides Glc-(1→3)-Hep4P Hep-(1→3)-Hep4P and Hep-(1→7)-Hep4P and the branched trisaccharide Glc-(1→3)-[Hep-(1→7)]-Hep4P, respectively, have been synthesized

  许多革兰氏阴性菌的结构上保守的脂多糖芯区域由含有4-三糖的ö磷酸化的升-甘油基- d -甘露-heptose（升，d -Hep）单元，其充当配体抗体和凝集素。二糖 Glc-(1→3)-Hep4P Hep-(1→3)-Hep4P 和 Hep-(1→7)-Hep4P 和支链三糖 Glc-(1→3)-[Hep-(1→7) ]-Hep4P 分别由甲基吡喃庚糖苷受体合成，步骤少于 10 步。合成策略基于在庚糖的 4 位提前引入磷酸三酯，然后区域选择性地打开 6,7- O-(1,1,3,3-四异丙基-1,3-二硅氧烷-1,3-二基) 基团允许直接进入第 7 位的糖基化。全苄基化N-苯基三氟乙酰亚胺葡萄糖基和庚糖基衍生物作为 α-选择性糖基供体。
• Synthesis of a Branched Heptose- and Kdo-Containing Common Tetrasaccharide Core Structure of <i>Haemophilus </i><i>i</i><i>nfluenzae</i> Lipopolysaccharides via a 1,6-Anhydro-<scp>l</scp>-<i>g</i><i>lycero</i>-β-<scp>d</scp>-<i>m</i><i>anno-</i>heptopyranose Intermediate
  作者：Christian Bernlind、Stefan Oscarson

  DOI：10.1021/jo9808573

  日期：1998.10.1

  The synthesis of a common tetrasaccharide core structure of Haemophilus influenzae lipopolysaccharides, beta-D-glucopyranosyl-(1-->4)-[L-glycero-alpha-D-manno-heptopyranosyl-(1-->3)]-L-glycero-alpha-D-manno-heptopyranosyl-(1-->5)-3-deoxy-alpha-D-manno-octulopyranoside and the trisaccharide beta-D-glucopyranosyl-(1-->4)-[L-glycero-alpha-D-manno-heptopyranosyl-(1-->3)]-L-glycero-alpha-D-manno-heptopyranoside is described. The oligosaccharides are synthesized as glycosides of a bifunctional spacer, 2-(4-aminophenyl)ethanol, to allow the subsequent formation of immunogenic glycoconjugates, which will be evaluated as well-defined glycoconjugate vaccine candidates. The syntheses of the 3,4-branched structures were accomplished using a 1,6-anhydro-L-glycero-beta-D-manno-heptopyranose intermediate to diminish the steric crowding between the 3- and 1-substituent. This intermediate was effectively synthesized from a mannose precursor via a stereoselective one-carbon elongation using a Barbier reaction (which was found to be more convenient than a Grignard reaction) and anhydro bridge formation through an internal glycosylation of a 6-O-trimethylsilylated ethyl thioheptoside using NIS/TfOH as a promoter. The 3- and 4-substituent were readily introduced into the 1,6-anhydro intermediate by glycosylation reactions using thioglycosides as donors and NIS/TfOH as a promoter, a task which has not been possible using accepters with equatorial 3,4-substituents. Acetolysis of the anhydro bridge followed by conversion into the ethyl thioglycoside afforded a trisaccharide donor, which, in NIS/TfOH-promoted couplings to the spacer and to a Kdo acceptor followed by deprotection, efficiently gave the two target compounds.