4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-β-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate | 150969-32-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-β-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate
• CAS: 150969-32-7
• 化学式: C₅₆H₅₆Cl₃NO₁₁
• 分子量: 1025.42
• InChiKey: XQBAWXUDDXZDME-JKNZNMCRSA-N

物化性质

• 密度：
  1.32±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  10.86
• 重原子数：
  71.0
• 可旋转键数：
  20.0
• 环数：
  9.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  125.38
• 氢给体数：
  1.0
• 氢受体数：
  12.0

反应信息

• 作为反应物：
  描述：

  allyl 2,3,6-tri-O-benzyl-β-D-galactopyranoside 、 4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-β-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate 在 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下， 生成 、 allyl 4-O-<4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-β-D-glucopyranosyl)-2,3,6-tri-O-benzyl-α-D-glucopyranosyl>-2,3,6-tri-O-benzyl-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of structural elements of the capsular polysaccharide of streptococcus pneumoniae type 8

  摘要：

  The synthesis is reported of propyl 4-O-alpha-D-galactopyranosyl-beta-D-glucopyranosiduronic acid (25), 4-O-[4-O-(beta-D-glucopyranosyluronic acid)-beta-D-glucopyranosyl]-D-glucopyranose (34), and 4-O-(4-O-beta-D-glucopyranosyl-alpha-D-glucopyranosyl)-D-galactopyranose (38), each representing a structural element of the repeating unit of the capsular polysaccharide of Streptococcus pneumoniae type 8, [-->4)-beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->4)-alpha-D-Glcp-(1-->4)-alpha-D-Galp-(1-->]n. 2,3-Di-O-benzyl-4,6-O-benzylidene-alpha-D-galactopyranosyl trichloroacetimidate (12) was coupled to allyl 2-0-acetyl-3-O-benzyl-6-0-trityl-beta-D-glucopyranoside (7) in dichloromethane-ether, using trimethylsilyl trifluoromethanesulfonate as a promoter, to give disaccharide derivative 20. Detritylation of 20, followed by oxidation and deprotection, afforded disaccharide propyl glycoside 25. Coupling of 2,3,4,6-tetra-0-acetyl-alpha-D-glucopyranosyl trichloroacetimidate (8) to allyl 2,3,6-tri-O-benzyl-4-O-(2,3,6-tri-O-benzyl-beta-D-glucopyranosyl)-beta-D-glucopyranoside (17) in dichloromethane, with trimethylsilyl trifluoromethanesulfonate as a promoter, resulted in trisaccharide derivative 26. Deacetylation of 26, followed by 6-O-tritylation, benzylation, detritylation, and oxidation gave a protected trisaccharide derivative (31), which, after deprotection, afforded 34. Coupling of allyl 2,3,6-tri-O-benzyl-beta-D-galactopyranoside (10) to 4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-beta-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate (19) in ether, with trimethylsilyl trifluoromethanesulfonate as a promoter, gave trisaccharide derivative 35. Deallylation of 35, followed by hydrogenolysis afforded 38.

  DOI：

  10.1016/s0040-4020(01)82378-4
• 作为产物：
  描述：

  2,3,6,8,9,10,12-hepta-O-acetyl-1-O-allyl-β-D-cellobioside 在 potassium tert-butylate 、 sodium methylate 、 sodium hydride 、 对甲苯磺酸 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 mercury dichloride 、 mercury(II) oxide 作用下， 以 甲醇 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 6.0h， 生成 4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-β-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate
  参考文献：
  名称：

  Synthesis of structural elements of the capsular polysaccharide of streptococcus pneumoniae type 8

  摘要：

  The synthesis is reported of propyl 4-O-alpha-D-galactopyranosyl-beta-D-glucopyranosiduronic acid (25), 4-O-[4-O-(beta-D-glucopyranosyluronic acid)-beta-D-glucopyranosyl]-D-glucopyranose (34), and 4-O-(4-O-beta-D-glucopyranosyl-alpha-D-glucopyranosyl)-D-galactopyranose (38), each representing a structural element of the repeating unit of the capsular polysaccharide of Streptococcus pneumoniae type 8, [-->4)-beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->4)-alpha-D-Glcp-(1-->4)-alpha-D-Galp-(1-->]n. 2,3-Di-O-benzyl-4,6-O-benzylidene-alpha-D-galactopyranosyl trichloroacetimidate (12) was coupled to allyl 2-0-acetyl-3-O-benzyl-6-0-trityl-beta-D-glucopyranoside (7) in dichloromethane-ether, using trimethylsilyl trifluoromethanesulfonate as a promoter, to give disaccharide derivative 20. Detritylation of 20, followed by oxidation and deprotection, afforded disaccharide propyl glycoside 25. Coupling of 2,3,4,6-tetra-0-acetyl-alpha-D-glucopyranosyl trichloroacetimidate (8) to allyl 2,3,6-tri-O-benzyl-4-O-(2,3,6-tri-O-benzyl-beta-D-glucopyranosyl)-beta-D-glucopyranoside (17) in dichloromethane, with trimethylsilyl trifluoromethanesulfonate as a promoter, resulted in trisaccharide derivative 26. Deacetylation of 26, followed by 6-O-tritylation, benzylation, detritylation, and oxidation gave a protected trisaccharide derivative (31), which, after deprotection, afforded 34. Coupling of allyl 2,3,6-tri-O-benzyl-beta-D-galactopyranoside (10) to 4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-beta-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate (19) in ether, with trimethylsilyl trifluoromethanesulfonate as a promoter, gave trisaccharide derivative 35. Deallylation of 35, followed by hydrogenolysis afforded 38.

  DOI：

  10.1016/s0040-4020(01)82378-4