| 212713-51-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子
• CAS: 212713-51-4
• 化学式: C₃₈H₅₄Cl₃NO₁₆Si
• 分子量: 915.288
• InChiKey: RGECFJIMQIAYBF-QCJKEKPZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.42
• 重原子数：
  59.0
• 可旋转键数：
  14.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.71
• 拓扑面积：
  198.91
• 氢给体数：
  1.0
• 氢受体数：
  16.0

反应信息

• 作为反应物：
  描述：

  在 盐酸 、 三氟甲磺酸三甲基硅酯 、 sodium cyanoborohydride 作用下， 以 四氢呋喃 、 乙醚 、 二氯甲烷 为溶剂， 反应 2.08h， 生成 thexyldimethylsilyl O-(3,4-di-O-acetyl-2-O-benzyl-α-L-fucopyranosyl)-(1->4)-[2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1->3)]-6-O-benzyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranoside
  参考文献：
  名称：

  Synthesis of Lewis a and Lewis X Pentasaccharides Based on N-Trichloroethoxycarbonyl Protection

  摘要：

  Thexyldimethylsilyl 4,6-O-benzylidene-2-deoxy-2-trichloroethoxycarbonylamino-beta-D-glucopyranoside (4), having the 3-hydroxy group unprotected, is a versatile starting material for the synthesis of glucosamine containing oligosaccharides. Thus, reaction with galactosyl donor 5 or fucosyl donor 6 afforded the desired beta(1-3)- and alpha(1-3)-linked disaccharides 7 and 8, respectively, in high yields, Reductive opening of the benzylidene moieties in 7 and 8 gave access to the 4-hydroxy groups in 9 and 10. Ensuing fucosylation of 9 or galactosylation of 10 led to Lewis A (Le(a)) and Lewis X (Le(x)) trisaccharide building blocks 13 and 14, respectively. Their transformation into glycosyl donors 19 and 20 and subsequent reaction with 3b-O-unprotected lactose derivative 23 as acceptor furnished the Le(a)- and Le(x) pentasaccharide precursors 24 and 25. Exchange of the N-trichloroethoxycarbonyl group for an N-acetyl group and removal of the O-benzyl and O-acetyl protective groups afforded the desired Le(a)- and Lex-pentasaccharides 1 and 2.

  DOI：

  10.1080/07328309808002349
• 作为产物：
  描述：

  苯甲醛二甲缩醛 在 三氟甲磺酸三甲基硅酯 、 对甲苯磺酸 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 2.17h， 生成
  参考文献：
  名称：

  Synthesis of Lewis a and Lewis X Pentasaccharides Based on N-Trichloroethoxycarbonyl Protection

  摘要：

  Thexyldimethylsilyl 4,6-O-benzylidene-2-deoxy-2-trichloroethoxycarbonylamino-beta-D-glucopyranoside (4), having the 3-hydroxy group unprotected, is a versatile starting material for the synthesis of glucosamine containing oligosaccharides. Thus, reaction with galactosyl donor 5 or fucosyl donor 6 afforded the desired beta(1-3)- and alpha(1-3)-linked disaccharides 7 and 8, respectively, in high yields, Reductive opening of the benzylidene moieties in 7 and 8 gave access to the 4-hydroxy groups in 9 and 10. Ensuing fucosylation of 9 or galactosylation of 10 led to Lewis A (Le(a)) and Lewis X (Le(x)) trisaccharide building blocks 13 and 14, respectively. Their transformation into glycosyl donors 19 and 20 and subsequent reaction with 3b-O-unprotected lactose derivative 23 as acceptor furnished the Le(a)- and Le(x) pentasaccharide precursors 24 and 25. Exchange of the N-trichloroethoxycarbonyl group for an N-acetyl group and removal of the O-benzyl and O-acetyl protective groups afforded the desired Le(a)- and Lex-pentasaccharides 1 and 2.

  DOI：

  10.1080/07328309808002349