methyl 3,4-di-O-acetyl-[(S)-1,2-O-(1-ethoxyethylidene)]-α-D-glucopyranuronate | 63950-44-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 3,4-di-O-acetyl-[(S)-1,2-O-(1-ethoxyethylidene)]-α-D-glucopyranuronate
• CAS: 63950-44-7
• 化学式: C₁₅H₂₂O₁₀
• 分子量: 362.334
• InChiKey: OTLAOZZFADYSSN-XISXQVBMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.13
• 重原子数：
  25.0
• 可旋转键数：
  5.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  115.82
• 氢给体数：
  0.0
• 氢受体数：
  10.0

反应信息

• 作为反应物：
  描述：

  methyl 3,4-di-O-acetyl-[(S)-1,2-O-(1-ethoxyethylidene)]-α-D-glucopyranuronate 在 sodium methylate 作用下， 以 甲醇 为溶剂， 反应 1.0h， 以95%的产率得到methyl [(S)-1,2-O-(1-ethoxyethylidene)]-α-D-glucopyranuronate
  参考文献：
  名称：

  Comparison of Several Glucuronate Glycosyl Donors

  摘要：

  Methyl 3,4-di-O-benzyl-[(S)-1,2-O-(1-cyanoethylidene)]-alpha-D-glucopyranuronate (12), methyl 3,4-di-O-benzyl-[(S)-1,2-O-(1-ethoxyethylidene)]-alpha-D-glucopyranuronate (14), methyl 2-O-acetyl-3,4-di-O-benzyl-alpha-D-glucopyranuronate bromide (15), methyl (2-O-acetyl-3,4-di-O-benzyl-alpha-D-glucopyranosyl)uronate trichloroacetimidate (17), and methyl (2,3,4-tri-O-benzyl-alpha/beta-D-glucopyranosyl)uronate trichloroacetimidate (30) were synthesized and used as glycosyl donors. Glycosylation reactions of 12 with (5-R)-2,3,4,5-tetrahydro-5-trityloxymethyl-2-furanone (32) and 14,15,17 with the corresponding (5-R)-2,3,4,5-tetrahydro-5-hydroxymethyl-2-furanone (31) provided the exclusively beta-linked glucuronide 33 in 69%, 28%, 45%, and 71% yield, respectively. The coupling of donor 30 with acceptor 31 furnished the glucuronated lactone 35 in 70% yield with a surprisingly high content (20%) of the undesired alpha-linked sugar residue. The structure of 33 was proved by NMR and X-ray diffraction studies. In a model reaction a complete deprotection procedure of the glucuronic acid lactone conjugation was demonstrated.

  DOI：

  10.1081/car-120026603
• 作为产物：
  描述：

  乙醇 、 methyl 2,3,4-tri-O-acetyl-D-glucopyranuronate 在 1-氯-N,N,2-三甲基丙烯胺 、 三乙胺 作用下， 生成 methyl 3,4-di-O-acetyl-[(S)-1,2-O-(1-ethoxyethylidene)]-α-D-glucopyranuronate
  参考文献：
  名称：

  Haloenamines -II. A rapid and efficient synthesis of carbohydrate 1,2-orthoesters

  摘要：

  DOI：

  10.1016/s0040-4039(00)97015-1