methyl 3,4,6-tri-O-benzyl-2-O-(2,3,4,6-tetra-O-acetyl-5-thio-α-D-mannopyranosyl)-α-D-mannopyranoside | 215653-55-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 3,4,6-tri-O-benzyl-2-O-(2,3,4,6-tetra-O-acetyl-5-thio-α-D-mannopyranosyl)-α-D-mannopyranoside
• CAS: 215653-55-7
• 化学式: C₄₂H₅₀O₁₄S
• 分子量: 810.917
• InChiKey: WKDMLULVMNASJI-RJKRNPRLSA-N

物化性质

• 沸点：
  802.049±65.00 °C(Press: 760.00 Torr)(predicted)
• 密度：
  1.296±0.10 g/cm3(Temp: 25 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.93
• 重原子数：
  57.0
• 可旋转键数：
  18.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  160.58
• 氢给体数：
  0.0
• 氢受体数：
  15.0

反应信息

• 作为反应物：
  描述：

  methyl 3,4,6-tri-O-benzyl-2-O-(2,3,4,6-tetra-O-acetyl-5-thio-α-D-mannopyranosyl)-α-D-mannopyranoside 在 甲醇 、 4-二甲氨基吡啶 、 氨 、 sodium methylate 、 sodium 作用下， 反应 5.5h， 生成 methyl 2-O-(5-thio-α-D-mannopyranosyl)-α-D-mannopyranoside
  参考文献：
  名称：

  Synthesis of heteroanalogues of disaccharides as potential inhibitors of the processing mannosidase Class I enzymes

  摘要：

  Three disaccharide analogues of alpha-D -Man-(l-->2)-alpha-D-Man-OMe in which the ring and/or glycosidic oxygen atoms have been replaced by sulfur have been synthesized as potential inhibitors of Class I mannosidase enzymes. Glycosylation of appropriately protected methyl alpha-D-mannopyranosides, having free alcohol or thiol functional groups at the 2-position, with 2,3,4,6-tetra-O-acetyl-5-thio-alpha-D-mannopyranosyl trichloroacetitmidate was selective for the synthesis of cr-linked disaccharides in the case of the 2-alcohols, but yielded an alpha/beta mixture in the case of the 2-thiol glycosyl accepters. A disaccharide containing a single sulfur in the linkage was synthesized by nucleophilic substitution of the 2-triflate of a methyl alpha-D-glucopyranoside derivative by the thiolate anion of 2,3,4,6-tetra-O-acetyl-1-thio-alpha-D-mannopyranose. Protecting groups were removed by standard methods to give the free heterosubstituted disaccharides. (C) 1998 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(98)00162-1
• 作为产物：
  描述：

  1,2,3,4,6-penta-O-acetyl-5-thio-α-D-mannopyranose 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 23.25h， 生成 methyl 3,4,6-tri-O-benzyl-2-O-(2,3,4,6-tetra-O-acetyl-5-thio-α-D-mannopyranosyl)-α-D-mannopyranoside
  参考文献：
  名称：

  Synthesis of heteroanalogues of disaccharides as potential inhibitors of the processing mannosidase Class I enzymes

  摘要：

  Three disaccharide analogues of alpha-D -Man-(l-->2)-alpha-D-Man-OMe in which the ring and/or glycosidic oxygen atoms have been replaced by sulfur have been synthesized as potential inhibitors of Class I mannosidase enzymes. Glycosylation of appropriately protected methyl alpha-D-mannopyranosides, having free alcohol or thiol functional groups at the 2-position, with 2,3,4,6-tetra-O-acetyl-5-thio-alpha-D-mannopyranosyl trichloroacetitmidate was selective for the synthesis of cr-linked disaccharides in the case of the 2-alcohols, but yielded an alpha/beta mixture in the case of the 2-thiol glycosyl accepters. A disaccharide containing a single sulfur in the linkage was synthesized by nucleophilic substitution of the 2-triflate of a methyl alpha-D-glucopyranoside derivative by the thiolate anion of 2,3,4,6-tetra-O-acetyl-1-thio-alpha-D-mannopyranose. Protecting groups were removed by standard methods to give the free heterosubstituted disaccharides. (C) 1998 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(98)00162-1