p-methoxyphenyl 2,3-di-O-benzoyl-6-O-levulinoyl-β-D-glucopyranoside | 1381876-01-2

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 糖脂
• 英文名称: p-methoxyphenyl 2,3-di-O-benzoyl-6-O-levulinoyl-β-D-glucopyranoside
• CAS: 1381876-01-2
• 化学式: C₃₂H₃₂O₁₁
• 分子量: 592.599
• InChiKey: RXYZPERIDMXACW-ZDPOQHKJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.52
• 重原子数：
  43.0
• 可旋转键数：
  12.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  143.89
• 氢给体数：
  1.0
• 氢受体数：
  11.0

反应信息

• 作为反应物：
  描述：

  p-methoxyphenyl 2,3-di-O-benzoyl-6-O-levulinoyl-β-D-glucopyranoside 在 2,4-二甲基吡啶 、 三氟甲磺酸三甲基硅酯 、 硫脲 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 8.0h， 生成 p-methoxyphenyl 4,6-di-O-benzylidene-2-deoxy-2-phthalimido-β-D-glucopyranosyl-(1→4)-2,3-di-O-benzoyl-6-O-levulinoyl-β-D-glucopyranoside
  参考文献：
  名称：

  Synthesis and Immunological Characterization of Modified Hyaluronic Acid Hexasaccharide Conjugates

  摘要：

  The synthesis of a tetanus toxoid (TT)-conjugate of a hyaluronic acid (HA) hexasaccharide is described. The compound was intended for use in monitoring HA levels as a disease marker and as a potential vaccine against Group A Streptococcus (GAS) infections. We also report the synthesis of a chemically modified HA-hexasaccharide-TT conjugate in which the N-acetyl moiety of the N-acetyl-D-glucosamine residue is replaced with an N-propionyl unit in order to enhance immunogenicity. The oligosaccharides are synthesized in a convergent manner. The TT-conjugate syntheses rely on the reaction of the amines on the 6-aminohexyl aglycon of the hexasaccharides with diethyl squarate to give the monoethyl squarate adducts. Subsequent reactions with lysine epsilon-amino groups on TT then give the glycoconjugates containing an average of 8 hexasaccharide haptens per TT molecule. Immunological studies in mice show very similar antibody responses with both conjugates, suggesting that the N-acetyl groups of the glucosaminyl residues of the HA-hexasaccharide are not a critical part of the epitope recognized by the anti-HA polyclonal immune response. Furthermore, it would appear that the N-acyl moieties are not in close contact with the amino acid residues of the antibody combining sites.

  DOI：

  10.1021/jo4012442
• 作为产物：
  描述：

  4-methoxyphenyl 2,3-di-O-benzyl-4,6-O-benzylidene-β-D-glucopyranoside 在 2-氯-1-甲基吡啶碘化物 、 溶剂黄146 作用下， 以 氯仿 、 1,2-二氯乙烷 为溶剂， 反应 0.83h， 生成 p-methoxyphenyl 2,3-di-O-benzoyl-6-O-levulinoyl-β-D-glucopyranoside
  参考文献：
  名称：

  Synthesis and Immunological Characterization of Modified Hyaluronic Acid Hexasaccharide Conjugates

  摘要：

  The synthesis of a tetanus toxoid (TT)-conjugate of a hyaluronic acid (HA) hexasaccharide is described. The compound was intended for use in monitoring HA levels as a disease marker and as a potential vaccine against Group A Streptococcus (GAS) infections. We also report the synthesis of a chemically modified HA-hexasaccharide-TT conjugate in which the N-acetyl moiety of the N-acetyl-D-glucosamine residue is replaced with an N-propionyl unit in order to enhance immunogenicity. The oligosaccharides are synthesized in a convergent manner. The TT-conjugate syntheses rely on the reaction of the amines on the 6-aminohexyl aglycon of the hexasaccharides with diethyl squarate to give the monoethyl squarate adducts. Subsequent reactions with lysine epsilon-amino groups on TT then give the glycoconjugates containing an average of 8 hexasaccharide haptens per TT molecule. Immunological studies in mice show very similar antibody responses with both conjugates, suggesting that the N-acetyl groups of the glucosaminyl residues of the HA-hexasaccharide are not a critical part of the epitope recognized by the anti-HA polyclonal immune response. Furthermore, it would appear that the N-acyl moieties are not in close contact with the amino acid residues of the antibody combining sites.

  DOI：

  10.1021/jo4012442

文献信息

• An efficient and recyclable catalyst for the cleavage of tert-butyldiphenylsilyl ethers
  作者：Shiqiang Yan、Ning Ding、Wei Zhang、Peng Wang、Yingxia Li、Ming Li

  DOI：10.1016/j.carres.2012.02.021

  日期：2012.6

  An efficient, chemoselective, and environment-friendly method for the deprotection of tert-butyldiphenylsilyl ethers mediated by triflic acid supported on silica gel is reported. A wide range of tert-butyldiphenylsilyl ethers derived from carbohydrate and saponin residues can be smoothly cleaved in the presence of various types of other protecting groups in good to excellent yields in acetonitrile. This heterogeneous reaction does not require aqueous workup, and the supported catalyst can be readily recycled. (C) 2012 Elsevier Ltd. All rights reserved.