1,2,3,4-tetra-O-benzoyl-α-D-galactopyranose | 101802-79-3

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 1,2,3,4-tetra-O-benzoyl-α-D-galactopyranose
• 英文别名: [(2R,3S,4S,5R,6R)-4,5,6-tribenzoyloxy-2-(hydroxymethyl)oxan-3-yl] benzoate
• CAS: 101802-79-3
• 化学式: C₃₄H₂₈O₁₀
• 分子量: 596.59
• InChiKey: JSXMRQAFUOMKAD-KHSPHJBMSA-N

物化性质

• 沸点：
  742.9±60.0 °C(Predicted)
• 密度：
  1.38±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.24
• 重原子数：
  44.0
• 可旋转键数：
  9.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  134.66
• 氢给体数：
  1.0
• 氢受体数：
  10.0

反应信息

• 作为反应物：
  描述：

  1,2,3,4-tetra-O-benzoyl-α-D-galactopyranose 在 2,4,6-三甲基吡啶 、 silver trifluoromethanesulfonate 、 zinc(II) chloride 作用下， 以 二氯甲烷 、 氯仿 为溶剂， 反应 2.25h， 生成 O-(2,3,4-tri-O-benzoyl-6-O-chloroacetyl-β-D-galactopyranosyl)-(1->6)-2,3,4-tri-O-benzoyl-α-D-galactopyranosyl ckloride
  参考文献：
  名称：

  Binding studies on internal immunodeterminants: synthesis of β-(1 → 6)-linked oligosaccharide methyl glycosides having one to four internal d-galactopyranosyl residues flanked by gentiobiose residues

  摘要：

  The oligosaccharide glycosides beta-D-Glc p-(1 --> 6)-beta-D-Glc p-(1 --> 6)-[beta-D-Gal p-(1 --> 6)]n-beta-D-Glc p-(1 --> 6)-beta-D-Glc p-1 --> OMe (n = 1-4) were prepared by a convergent block synthesis. Haloacetyl, tert-butyldiphenylsilyl, and dimethylthexylsilyl groups were used as temporary protective groups for the preparation of the intermediate glycosyl donors and acceptors. The deoxygenated trisaccharide glyco-sides beta-D-Glc p-(1 --> 6)-beta-D-Gal p-(1 --> 6)-4-deoxy-beta-D-xylo-Hex p-1 --> OMe and beta-D-Glc p-(1 --> 6)-4-deoxy-beta-D-xylo-Hex p-(1 --> 6)-beta-D-Gal p-1 --> OMe were also synthesized. The binding of each glycoside to the monoclonal antigalactan antibody IgA 1539 was studied and the results support the previous finding that J539 can bind to internal antigenic epitopes. The data are consistent with the interpretation that subsite C of that antibody binds glucose with a K(a) of approximately 6 (cf. 10.9 for galactose).

  DOI：

  10.1016/s0008-6215(00)90575-5
• 作为产物：
  描述：

  1,2,3,4-tetra-O-benzoyl-6-O-trityl-α-D-galactopyranose 在 三甲基氯硅烷 、 sodium iodide 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 0.05h， 以92%的产率得到1,2,3,4-tetra-O-benzoyl-α-D-galactopyranose
  参考文献：
  名称：

  通过逐步和嵌段方法高效化学合成β-（1→6）-连接的d-半乳糖寡糖的甲基β-糖苷

  摘要：

  甲基2,3,4-三-O-苯甲酰基-β-D-吡喃半乳糖苷（1）的溴乙酰化反应，然后用1,1-二氯甲基甲基醚将生成的6-O-溴乙酰基衍生物2的甲氧基裂解，3，4-三-O-苯甲酰基-6-O-溴乙酰基-α-D-吡喃半乳糖基氯（3）。三氟甲磺酸银促进3与1的反应，得到甲基O-（2,3,4-三-O-苯甲酰基-6-O-溴乙酰基-β-D-吡喃半乳糖基）-（1 ---- 6）- 2,3,4-三-O-苯甲酰基-β-D-吡喃半乳糖苷（12），在其非还原端基的O-6处带有可选择性除去的溴乙酰基。将其O-脱溴乙酰化，并将形成的二糖亲核试剂15再次用3处理，得到类似的三糖18。重复该反应序列，得到类似的四糖20，显示了逐步构建标题寡糖的可行性。3与1,2,3,4-四-O-苯甲酰基-α-（7）和β-D-吡喃半乳糖（5）的相似反应分别得到O-（2,3,4-tri-O-苯甲酰基-6-O-溴乙酰基-β-D-吡喃半乳糖基）-（1

  DOI：

  10.1016/s0008-6215(00)90266-0

文献信息

• Synthesis of a-O- and a-S-Glycosphingolipids Related to Sphingomonous cell Wall Antigens Using Anomerisation
  作者：Wayne Pilgrim、Ciaran O'Reilly、Paul Murphy

  DOI：10.3390/molecules180911198

  日期：——

  Analogues of glycolipids from Spingomonadacaece with O- and S- and SO2-linkages have been prepared using chelation induced anomerisation promoted by TiCl4. Included are examples of the anomerisation of intermediates with O- and S-glycosidic linkages as well as isomerisation of β-thioglycuronic acids (β-glycosyl thiols). The β-O-glucuronide and β-O-galacturonide precursors were efficiently prepared using benzoylated trichloroacetimidates. β-Glycosyl thiols were precursors to β-S-derivatives. Triazole containing mimics of the natural glycolipids were prepared using CuI promoted azide-alkyne cycloaddition reactions in THF. The glycolipid antigens are being evaluated currently for their effects on iNKT cells.

  来自Spingomonadacaece的糖脂类类似物，具有O-、S-和SO2-连接，通过TiCl4催化的螯合诱导的异构化进行了制备。其中包括具有O-和S-糖苷键的中间体异构化的例子，以及β-硫葡萄糖醇酸（β-糖苷硫醇）的异构化。β-O-葡萄糖醛酸酯和β-O-半乳糖醛酸酯的前体采用苯甲酰化三氯乙酰胺高效制备。β-糖苷硫醇是β-S-衍生物的前体。含有三唑的天然糖脂类模仿物使用CuI催化的叠氮烷炔环加成反应在THF中制备。当前正在评估这些糖脂抗原对iNKT细胞的影响。
• Regiospecific Anomerisation of Acylated Glycosyl Azides and Benzoylated Disaccharides by Using TiCl₄
  作者：Mark Farrell、Jian Zhou、Paul V. Murphy

  DOI：10.1002/chem.201302572

  日期：2013.10.25

  5 equiv) was employed to induce anomerisation of 15 glycosyl azide and disaccharide substrates of low reactivity, and high yields (>75 %) and stereoselectivies (α/β>9:1) were achieved. The examples included glucopyranuronate, galactopyranuronate and mannopyranuronate as well as N‐acetylated glucopyranuronate and galactopyranuronate derivatives. A disaccharide with the α1→4 linkage found in polygalacturonan

  当路易斯酸（例如TiCl 4或SnCl 4）与吡喃糖环的氧原子和另一个位点配位时，会促进螯合诱导的异构化，从而导致内环裂解和异构化为更稳定的异构体。在这项研究中，证明了区域特异性定点异构化。的TiCl 4（2.5当量）用于诱导15种反应性低的糖基叠氮化物和二糖底物的异构化，并获得高产率（＞ 75％）和立体选择性（α/β＞ 9∶1）。实例包括吡喃葡萄糖醛酸，吡喃葡萄糖醛酸和甘露吡喃醛酸酯以及N-乙酰化吡喃葡萄糖醛酸和吡喃葡萄糖醛酸酯衍生物。包括在聚半乳糖醛酸中发现的具有α1→4键的二糖。已发现使用苯甲酰化的糖类在二糖异构化中非常重要，因为尝试使相关的乙酰基保护的2,3-碳酸酯保护的衍生物异构化的尝试并不成功。
• Systematic chemical synthesis of (1→6)-β-d-galacto-oligosaccharides and related compounds
  作者：Pavol Kováč

  DOI：10.1016/s0008-6215(00)90686-4

  日期：1985.12