(3aS,4R,6S,7R,7aS)-7-Benzyloxy-6-((2R,3S,4R)-4-benzyloxy-2-benzyloxymethyl-3,4-dihydro-2H-pyran-3-yloxy)-4-benzyloxymethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-2-one | 187999-61-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氧吡喃
• 英文名称: (3aS,4R,6S,7R,7aS)-7-Benzyloxy-6-((2R,3S,4R)-4-benzyloxy-2-benzyloxymethyl-3,4-dihydro-2H-pyran-3-yloxy)-4-benzyloxymethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-2-one
• 英文别名: (3aS,4R,6S,7R,7aS)-7-phenylmethoxy-4-(phenylmethoxymethyl)-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-2-one
• CAS: 187999-61-7
• 化学式: C₄₁H₄₂O₁₀
• 分子量: 694.778
• InChiKey: ZIJFVQSTHGDILJ-AEQXTEDISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.9
• 重原子数：
  51
• 可旋转键数：
  16
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  100
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  (3aS,4R,6S,7R,7aS)-7-Benzyloxy-6-((2R,3S,4R)-4-benzyloxy-2-benzyloxymethyl-3,4-dihydro-2H-pyran-3-yloxy)-4-benzyloxymethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-2-one 在 四丁基碘化铵 、 potassium carbonate 、 三丁基氧化锡 作用下， 以 甲醇 为溶剂， 生成 (2R,3S,4S,5R,6S)-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]oxan-3-ol
  参考文献：
  名称：

  Synthesis of Asialo GM₁. New Insights in the Application of Sulfonamidoglycosylation in Oligosaccharide Assembly:  Subtle Proximity Effects in the Stereochemical Governance of Glycosidation

  摘要：

  The total synthesis of asialo GM(1) (1a) has been accomplished, Using related chemistry, the methyl glycoside of the asialo compound (1b) has also been synthesized. These kinds of compounds have been identified as potential ligands for bacterial and viral infection sites, A simpler structure, which hits also been identified for its infection attracting structure in the context of glycopeptides and glycolipids (methyl glycoside 2), has also been synthesized. The key common phase in the syntheses involves the sulfonamidoglycosidation reaction which is used to create a beta-linkage leading to a galNAc residue joined to the C-4 hydroxyl group of a galactose unit either as a monosaccharide (see compound 2) or as C-4' in the contest of a lactosyl moiety, During the course of these studies there was encountered an unusual "proximal hydroxyl" directing effect. Thus, when C-4 on the galactose ring of an azaglycosylating donor bears a free hydroxyl (see, for instance, compound 13), beta-glycoside formation predominates. When this hydroxyl group is blocked, the process tends in the direction of alpha-glycoside formation (see compound 32), These findings were explained as arising from a critical intramolecular hydrogen bond between the C-4 axial hydroxyl of the galactose donor and its proximal pyranosidal ring oxygen. This interaction stabilizes conformations from which beta-glycosidation predominates.

  DOI：

  10.1021/ja9724957
• 作为产物：
  描述：

  (3aS,4R,6S,7R,7aR)-7-hydroxy-6-[[(2R,3S,4R)-4-phenylmethoxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]-4-[tri(propan-2-yl)silyloxymethyl]-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-2-one 在 四丁基氟化铵 、 sodium hydride 、 溶剂黄146 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 为溶剂， 生成 (3aS,4R,6S,7R,7aS)-7-Benzyloxy-6-((2R,3S,4R)-4-benzyloxy-2-benzyloxymethyl-3,4-dihydro-2H-pyran-3-yloxy)-4-benzyloxymethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-2-one
  参考文献：
  名称：

  Synthesis of Asialo GM₁. New Insights in the Application of Sulfonamidoglycosylation in Oligosaccharide Assembly:  Subtle Proximity Effects in the Stereochemical Governance of Glycosidation

  摘要：

  The total synthesis of asialo GM(1) (1a) has been accomplished, Using related chemistry, the methyl glycoside of the asialo compound (1b) has also been synthesized. These kinds of compounds have been identified as potential ligands for bacterial and viral infection sites, A simpler structure, which hits also been identified for its infection attracting structure in the context of glycopeptides and glycolipids (methyl glycoside 2), has also been synthesized. The key common phase in the syntheses involves the sulfonamidoglycosidation reaction which is used to create a beta-linkage leading to a galNAc residue joined to the C-4 hydroxyl group of a galactose unit either as a monosaccharide (see compound 2) or as C-4' in the contest of a lactosyl moiety, During the course of these studies there was encountered an unusual "proximal hydroxyl" directing effect. Thus, when C-4 on the galactose ring of an azaglycosylating donor bears a free hydroxyl (see, for instance, compound 13), beta-glycoside formation predominates. When this hydroxyl group is blocked, the process tends in the direction of alpha-glycoside formation (see compound 32), These findings were explained as arising from a critical intramolecular hydrogen bond between the C-4 axial hydroxyl of the galactose donor and its proximal pyranosidal ring oxygen. This interaction stabilizes conformations from which beta-glycosidation predominates.

  DOI：

  10.1021/ja9724957

文献信息

• Synthesis of the fucosylated biantennary N-glycan of erythropoietin
  作者：Bin Wu、Zihao Hua、J. David Warren、Krishnakumar Ranganathan、Qian Wan、Gong Chen、Zhongping Tan、Jiehao Chen、Atsushi Endo、Samuel J. Danishefsky

  DOI：10.1016/j.tetlet.2006.05.086

  日期：2006.7

  A synthesis of the protected biantennary N-glycan of the naturally occurring glycoprotein. erythropoietin. is described. (c) 2006 Elsevier Ltd. All rights reserved.