N-diphenylmethylene-O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-galactopyranosyl)-L-threonine diphenylmethyl ester | 172325-06-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: N-diphenylmethylene-O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-galactopyranosyl)-L-threonine diphenylmethyl ester
• CAS: 172325-06-3
• 化学式: C₄₂H₄₂N₄O₁₀
• 分子量: 762.816
• InChiKey: IGYXFHJCCLJXOX-WCYFEUEKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.46
• 重原子数：
  56.0
• 可旋转键数：
  15.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  184.78
• 氢给体数：
  0.0
• 氢受体数：
  12.0

反应信息

• 作为反应物：
  描述：

  N-diphenylmethylene-O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-galactopyranosyl)-L-threonine diphenylmethyl ester 在 N,N-二异丙基乙胺 、 三氟乙酸 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 0.83h， 生成 N-(9-fluorenylmethoxycarbonyl)-O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-galactopyranosyl)-L-threonine diphenylmethyl ester
  参考文献：
  名称：

  Stereoselective synthesis of O-serinyl/threoninyl-2-acetamido-2-deoxy-α- or β-glycosides

  摘要：

  General glycosidation methodology has been developed which can selectively provide 2acetamido-2-deoxy-alpha- or beta-glycosides of beta-hydroxy-alpha-amino acid derivatives [glucopyranoside- (8, 43), galactopyranoside- (9, 13), mannopyranoside- (10), lactoside analogs (11, 38) and 3-O-beta-galactopyranosyl-mannopyranoside (12)] stereoselectively in excellent yield from the highly nucleophilic a-imino esters (Schiff bases) of L-serine and L-threonine. Various glycosides were converted via their amino and acetamido derivatives to Fmoc-protected serinyl- or threoninyl-glycosides (24-28, 37, 41, 46) which are all suitable building blocks for the solid-phase synthesis of O-glycopeptides. Complete H-1- and C-13-NMR data are provided for all compounds.

  DOI：

  10.1016/0008-6215(95)00016-m
• 作为产物：
  描述：

  3,4,6-tri-O-acetyl-2-azido-2-deoxy-alpha-D-galactopyranosyl bromide 、 diphenylmethyl N-(diphenylmethylene)-L-threoninate 在 2,4,6-三甲基吡啶 、 silver perchlorate 作用下， 以 二氯甲烷 为溶剂， 反应 0.25h， 以76%的产率得到N-diphenylmethylene-O-(3,4,6-tri-O-acetyl-2-azido-2-deoxy-α-D-galactopyranosyl)-L-threonine diphenylmethyl ester
  参考文献：
  名称：

  Stereoselective synthesis of O-serinyl/threoninyl-2-acetamido-2-deoxy-α- or β-glycosides

  摘要：

  General glycosidation methodology has been developed which can selectively provide 2acetamido-2-deoxy-alpha- or beta-glycosides of beta-hydroxy-alpha-amino acid derivatives [glucopyranoside- (8, 43), galactopyranoside- (9, 13), mannopyranoside- (10), lactoside analogs (11, 38) and 3-O-beta-galactopyranosyl-mannopyranoside (12)] stereoselectively in excellent yield from the highly nucleophilic a-imino esters (Schiff bases) of L-serine and L-threonine. Various glycosides were converted via their amino and acetamido derivatives to Fmoc-protected serinyl- or threoninyl-glycosides (24-28, 37, 41, 46) which are all suitable building blocks for the solid-phase synthesis of O-glycopeptides. Complete H-1- and C-13-NMR data are provided for all compounds.

  DOI：

  10.1016/0008-6215(95)00016-m