2-(benzyloxycarbonyl)aminoethyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-α-D-mannopyranoside | 497096-20-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-(benzyloxycarbonyl)aminoethyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-α-D-mannopyranoside
• 英文别名: 2-carboxybenzylamidoethyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-α-D-mannopyranoside；benzyl N-[2-[(2S,3S,4R,5S,6R)-3-acetamido-6-(hydroxymethyl)-4,5-bis(phenylmethoxy)oxan-2-yl]oxyethyl]carbamate
• CAS: 497096-20-5
• 化学式: C₃₂H₃₈N₂O₈
• 分子量: 578.662
• InChiKey: WNGIQRRZIATMAQ-DUWVOHMTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  42
• 可旋转键数：
  15
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  125
• 氢给体数：
  3
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  2-(benzyloxycarbonyl)aminoethyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-α-D-mannopyranoside 在 四氮唑 、 间氯过氧苯甲酸 作用下， 以 乙腈 为溶剂， 反应 1.58h， 生成 2-(benzyloxycarbonyl)aminoethyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-6-O-dibenzylphosphate-α-D-mannopyranoside
  参考文献：
  名称：

  Towards a Synthetic Glycoconjugate Vaccine Against Neisseria meningitidis A

  摘要：

  Albumin conjugates of synthetic fragments of the capsular polysaccharide of the Gram-negative bacterium Neisseria meningitidis serogroup A were prepared. The fragments include monosaccharides 1 [alpha-D-ManpNAc(1--> 0)-(CH2)(2)NH2] and 2 [6-O-P(O)-(O-)(2)-alpha-D-ManpNAc-(1 --> O)-(CH2)(2)NH2] ,disaccharide 3 [alpha-D-ManpNAc[1-->O-P(O)(O-) --> 6]-alpha-D-ManpNAc(1 --> O)-(CH2)(2)NH2], and trisaccharide 4 [alpha-D-ManpNAc-[1 -->O-P(O)(O-)--> 6]-alpha-D-ManpNAc-[1 -->O-P(O)(O-)--> 6]-alpha-D-ManpNAc-(1 --> O)-(CH2)(2)NH2]. Two monosaccharide blocks were employed as key intermediates. The reduc-ing-end mannose unit featured the NHAc group at C-2, and contained the aminoethyl spacer as the aglycon for the final bioconjugation. The interresidual phosphodiester linkages were fashioned from an anomerically positioned H-phosphonate group in a 2-azido-man-nose building block. The spacer-linked saccharides 1-4 were N-acylated with hepta-4,6-dienoic acid and the resulting conjugated diene-equipped saccharides were subjected to Diels-Alder-type addition with maleimidobutyryl-group functionalized human serum albumin to form covalent conjugates containing up to 26 saccharide haptens per albumin molecule. Complete H-1, C-13, and P-31 NMR assignments for 1-4 are given. Antigenicity of the neoglycoconjugates containing 1-4 was demonstrated by a double immunodiffusion assay which indicated that a fragment as small as a monosaccharide is recognized by a polyclonal meningococcus group A antiserum and that the O-acetyl group(s) present in the natural capsular material is not essential for antigenicity.

  DOI：

  10.1002/1521-3765(20021004)8:19<4424::aid-chem4424>3.0.co;2-1
• 作为产物：
  描述：

  2-苄氧羰基氨基-1-乙醇 在 sodium tetrahydroborate 、 三氟甲磺酸三甲基硅酯 、 sodium methylate 、 nickel dichloride 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 8.5h， 生成 2-(benzyloxycarbonyl)aminoethyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-α-D-mannopyranoside
  参考文献：
  名称：

  Towards a Synthetic Glycoconjugate Vaccine Against Neisseria meningitidis A

  摘要：

  Albumin conjugates of synthetic fragments of the capsular polysaccharide of the Gram-negative bacterium Neisseria meningitidis serogroup A were prepared. The fragments include monosaccharides 1 [alpha-D-ManpNAc(1--> 0)-(CH2)(2)NH2] and 2 [6-O-P(O)-(O-)(2)-alpha-D-ManpNAc-(1 --> O)-(CH2)(2)NH2] ,disaccharide 3 [alpha-D-ManpNAc[1-->O-P(O)(O-) --> 6]-alpha-D-ManpNAc(1 --> O)-(CH2)(2)NH2], and trisaccharide 4 [alpha-D-ManpNAc-[1 -->O-P(O)(O-)--> 6]-alpha-D-ManpNAc-[1 -->O-P(O)(O-)--> 6]-alpha-D-ManpNAc-(1 --> O)-(CH2)(2)NH2]. Two monosaccharide blocks were employed as key intermediates. The reduc-ing-end mannose unit featured the NHAc group at C-2, and contained the aminoethyl spacer as the aglycon for the final bioconjugation. The interresidual phosphodiester linkages were fashioned from an anomerically positioned H-phosphonate group in a 2-azido-man-nose building block. The spacer-linked saccharides 1-4 were N-acylated with hepta-4,6-dienoic acid and the resulting conjugated diene-equipped saccharides were subjected to Diels-Alder-type addition with maleimidobutyryl-group functionalized human serum albumin to form covalent conjugates containing up to 26 saccharide haptens per albumin molecule. Complete H-1, C-13, and P-31 NMR assignments for 1-4 are given. Antigenicity of the neoglycoconjugates containing 1-4 was demonstrated by a double immunodiffusion assay which indicated that a fragment as small as a monosaccharide is recognized by a polyclonal meningococcus group A antiserum and that the O-acetyl group(s) present in the natural capsular material is not essential for antigenicity.

  DOI：

  10.1002/1521-3765(20021004)8:19<4424::aid-chem4424>3.0.co;2-1

文献信息

• Synthesis of stable C-phosphonate analogues of Neisseria meningitidis group A capsular polysaccharide structures using modified Mitsunobu reaction conditions
  作者：Peter Teodorović、Rikard Slättegård、Stefan Oscarson

  DOI：10.1039/b614038f

  日期：——

  Examples of synthetic C-phosphonate analogues of microbial polysaccharide structures containing inter-residue phosphodiester linkages are most rare. The successful construction of such analogues of the Neisseria meningitidis Group A capsular polysaccharide is described. Using a modified Mitsunobu reaction (tris(4-chlorophenyl)phosphine, DIAD, excess of Et3N) between an anomeric C-phosphonate monoester

  含有残基间磷酸二酯键的微生物多糖结构的合成C-膦酸酯类似物的例子是最罕见的。描述了脑膜炎奈瑟氏球菌A类荚膜多糖的此类类似物的成功构建。使用异头C-膦酸酯单酯和6-OH ManNAc受体之间的修饰的Mitsunobu反应（三（4-氯苯基）膦，DIAD，过量的Et3N），可获得高产率（88％）的二聚体。通过脱乙酰基将二聚体转化为新的6-OH受体，并在相同条件下与延伸的C-膦酸酯单体进一步反应，以92％的收率得到三聚体。然后重复该过程，得到四聚体，其偶联产率为85％。那个
• WO2006/120576
  申请人：——

  公开号：——

  公开（公告）日：——