methyl 2,3,4-tri-O-benzyl-6-O-(2,3,4,6-tetra-O-acetyl-5'-thio-α-D-glucopyranosyl)-α-D-glucopyranoside | 146558-09-0

• 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: methyl 2,3,4-tri-O-benzyl-6-O-(2,3,4,6-tetra-O-acetyl-5'-thio-α-D-glucopyranosyl)-α-D-glucopyranoside
• 英文别名: 5-thio-Glc2Ac3Ac4Ac6Ac(a1-6)[Bn(-2)][Bn(-3)][Bn(-4)]a-Glc1Me；[(2R,3S,4S,5R,6S)-3,4,5-triacetyloxy-6-[[(2R,3R,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]methoxy]thian-2-yl]methyl acetate
• CAS: 146558-09-0
• 化学式: C₄₂H₅₀O₁₄S
• 分子量: 810.917
• InChiKey: NQRUYRSJSFSMNW-JQGWILBRSA-N

物化性质

• 沸点：
  805.2±65.0 °C(predicted)
• 密度：
  1.29±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  57
• 可旋转键数：
  22
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  186
• 氢给体数：
  0
• 氢受体数：
  15

反应信息

• 作为反应物：
  描述：

  methyl 2,3,4-tri-O-benzyl-6-O-(2,3,4,6-tetra-O-acetyl-5'-thio-α-D-glucopyranosyl)-α-D-glucopyranoside 在 氨 、 sodium 作用下， 生成 methyl 6-O-(5'-thio-α-D-glucopyranosyl)-α-D-glucopyranoside
  参考文献：
  名称：

  前所未有的5-硫代葡萄糖化学糖基化生成二糖。

  摘要：

  2,3,4,6-四-O-乙酰基-5-硫代吡喃葡萄糖的糖基三氯乙酰亚氨酸酯，用于糖基化带有2-OH和6-OH位置的选择性保护的吡喃葡萄糖基受体时，会提供1,2-连接的和1 ，6-连接的二糖分别为3：1和1.5：1α：β混合物。

  DOI：

  10.1016/0040-4039(93)88013-9
• 作为产物：
  描述：

  1,2,3,4,6-penta-O-acetyl-5-thio-α,β-D-glucopyranose 在 4 A molecular sieve 、 三乙基硅基三氟甲磺酸酯 、 乙酸肼 、 potassium carbonate 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 27.0h， 生成 methyl 2,3,4-tri-O-benzyl-6-O-(2,3,4,6-tetra-O-acetyl-5'-thio-α-D-glucopyranosyl)-α-D-glucopyranoside
  参考文献：
  名称：

  Synthesis of sulfur analogues of methyl and allyl kojibiosides and methyl isomaltoside and conformational analysis of the kojibiosides

  摘要：

  The synthesis of methyl and allyl 5'-thio-alpha-D-kojibiosides and methyl 5'-thio-alpha-D-isomaltoside is described. The phenylselenoglycoside and trichloroacetimidate of 2,3,4,6-tetra-O-acetyl-5-thioglucose have been employed as glycosyl donors to glycosylate glucopyranosyl accepters with 2-OH and 6-OH positions free. The disaccharides thus obtained are potential glucosidase inhibitors. The conformational preferences of allyl 5'-thiokojibioside (34) were studied by comparison of experimental NOE curves with the theoretical counterparts for the corresponding methyl glycoside 25, derived from a Boltzmann-averaged grid search using the program PIMM91. Very goad agreement of experimental NOE curves derived from selective NOE measurements with the theoretical curves is found. The data are consistent with the population of a global minimum structure Phi=-43, Psi-39 degrees) to the extent of 90%, and a second local minimum (Phi=-36, Psi=-173 degrees) to the extent of 6%. An X-ray crystal structure of 34 at 190 K (R=4.2%) indicates a conformation (Phi=-46, Psi=-23 degrees) that is similar to that of the global minimum.

  DOI：

  10.1016/s0957-4166(00)80386-9