4-methoxyphenyl (2,3,4-tri-O-acetyl-6-O-benzyl-β-D-galactopyranosyl)-(1->4)-(6-O-benzyl-2-deoxy-2-(tetrachlorophthalimido)-β-D-glucopyranoside) | 219488-95-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4-methoxyphenyl (2,3,4-tri-O-acetyl-6-O-benzyl-β-D-galactopyranosyl)-(1->4)-(6-O-benzyl-2-deoxy-2-(tetrachlorophthalimido)-β-D-glucopyranoside)
• 英文别名: [(2R,3S,4S,5R,6S)-4,5-diacetyloxy-6-[(2R,3S,4R,5R,6S)-4-hydroxy-6-(4-methoxyphenoxy)-2-(phenylmethoxymethyl)-5-(4,5,6,7-tetrachloro-1,3-dioxoisoindol-2-yl)oxan-3-yl]oxy-2-(phenylmethoxymethyl)oxan-3-yl] acetate
• CAS: 219488-95-6
• 化学式: C₄₇H₄₅Cl₄NO₁₆
• 分子量: 1021.68
• InChiKey: PJEIWEYXYPVRDO-IIETZONKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.7
• 重原子数：
  68
• 可旋转键数：
  20
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  201
• 氢给体数：
  1
• 氢受体数：
  16

反应信息

• 作为反应物：
  描述：

  4-methoxyphenyl (2,3,4-tri-O-acetyl-6-O-benzyl-β-D-galactopyranosyl)-(1->4)-(6-O-benzyl-2-deoxy-2-(tetrachlorophthalimido)-β-D-glucopyranoside) 在 乙二胺 作用下， 以 甲醇 、 乙醇 、 水 为溶剂， 反应 4.0h， 生成 4-methoxyphenyl (2,3,4-tri-O-acetyl-6-O-benzyl-β-D-galactopyranosyl)-(1->4)-<2,3,4-tri-O-benzyl-α-L-fucopyranosyl>-(1->3)-(2-acetamido-2-deoxy-β-D-glucopyranoside)
  参考文献：
  名称：

  A High Yielding Chemical Synthesis of Sialyl Lewis x Tetrasaccharide and Lewis x Trisaccharide; Examples of Regio- and Stereodifferentiated Glycosylations

  摘要：

  Virtually complete regioselective galactosylation of the diol acceptor p-methoxyphenyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-n-glucopyranoside (8) with the donor phenyl 2,3,4-tri-O-acetyl-6-O-benzyl-1-thio-beta-D-galactopyranoside (11) gave the lactosamine derivative 14, which was fucosylated with the donor 15 to give the Le(x) trisaccharide glycoside 2 after deprotection. Regioselective sialylation of the partially protected Le(x) trisaccharide triol 24 with the sialyl donor 25 gave, after deprotection, the SLe(x) tetrasaccharide glycoside 1. The overall yields of 2 and 1 from the monosaccharide starting materials 8, 11, 15, and 25 were 56% and 29%, respectively. In contrast to the virtually complete regio- and stereoselective galactosylation of 8, fucosylation with the benzyl-protected donor 15 gave the corresponding 1-->3- and 1-->4-linked disaccharides in a ratio of 3.6:1 (highly stereo- but not regioselective glycosylation), whereas fucosylation with acetyl-protected donor 18 gave a 2.2:1 beta/alpha-mixture of 4-O-linked disaccharides (highly regio- but not stereoselective glycosylation).

  DOI：

  10.1021/jo981203x
• 作为产物：
  描述：

  1,3,4,6-四-O-乙酰基-2-氨基-2-脱氧-Β-D-葡萄糖盐酸盐 在 盐酸 、 甲磺酰溴 、 3 Angstroems MS 、 三氟化硼乙醚 、 sodium methylate 、 silver trifluoromethanesulfonate 、 sodium cyanoborohydride 、 对甲苯磺酸 作用下， 以 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 29.28h， 生成 4-methoxyphenyl (2,3,4-tri-O-acetyl-6-O-benzyl-β-D-galactopyranosyl)-(1->4)-(6-O-benzyl-2-deoxy-2-(tetrachlorophthalimido)-β-D-glucopyranoside)
  参考文献：
  名称：

  A High Yielding Chemical Synthesis of Sialyl Lewis x Tetrasaccharide and Lewis x Trisaccharide; Examples of Regio- and Stereodifferentiated Glycosylations

  摘要：

  Virtually complete regioselective galactosylation of the diol acceptor p-methoxyphenyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-n-glucopyranoside (8) with the donor phenyl 2,3,4-tri-O-acetyl-6-O-benzyl-1-thio-beta-D-galactopyranoside (11) gave the lactosamine derivative 14, which was fucosylated with the donor 15 to give the Le(x) trisaccharide glycoside 2 after deprotection. Regioselective sialylation of the partially protected Le(x) trisaccharide triol 24 with the sialyl donor 25 gave, after deprotection, the SLe(x) tetrasaccharide glycoside 1. The overall yields of 2 and 1 from the monosaccharide starting materials 8, 11, 15, and 25 were 56% and 29%, respectively. In contrast to the virtually complete regio- and stereoselective galactosylation of 8, fucosylation with the benzyl-protected donor 15 gave the corresponding 1-->3- and 1-->4-linked disaccharides in a ratio of 3.6:1 (highly stereo- but not regioselective glycosylation), whereas fucosylation with acetyl-protected donor 18 gave a 2.2:1 beta/alpha-mixture of 4-O-linked disaccharides (highly regio- but not stereoselective glycosylation).

  DOI：

  10.1021/jo981203x

文献信息

• Iodine Monochloride/Silver Trifluoromethanesulfonate (ICl/AgOTf) as a Convenient Promoter System for <i>O</i>-Glycoside Synthesis
  作者：Teddy Ercegovic、Andreas Meijer、Göran Magnusson、Ulf Ellervik

  DOI：10.1021/ol015547c

  日期：2001.3.1

  The novel promoter system iodine monochloride/silver trifluoromethanesulfonate (ICl/AgOTf) was evaluated with various thioglycoside donors and saccharide acceptors, and O-glycosides were obtained in 46-82% yield. Several practical advantages of the ICl/AgOTf system over known promoter systems were observed, such as convenient handling of the reagents and absence of byproducts related to N-succinimide

  用各种硫代糖苷供体和糖受体评估了新型的启动子系统一氯化碘/三氟甲磺酸银（IC1 / AgOTf），并以46-82％的产率获得了O-糖苷。观察到了ICl / AgOTf系统相对于已知启动子系统的一些实际优点，例如方便的试剂处理和不存在与N-琥珀酰亚胺有关的副产物。