methyl 2-azido-4-O-benzyl-2-deoxy-β-D-galactopyranoside | 130257-28-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2-azido-4-O-benzyl-2-deoxy-β-D-galactopyranoside
• 英文别名: (2R,3R,4R,5R,6R)-5-azido-2-(hydroxymethyl)-6-methoxy-3-phenylmethoxyoxan-4-ol
• CAS: 130257-28-2
• 化学式: C₁₄H₁₉N₃O₅
• 分子量: 309.322
• InChiKey: BHJYPWZJAPFMFN-XGFWRYKXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  22
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  82.5
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  methyl 2-azido-4-O-benzyl-2-deoxy-β-D-galactopyranoside 在 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 43.0h， 生成 methyl 2-acetamido-6-O-acetyl-4-O-benzyl-2-deoxy-3-O-(methyl 2,3,4-tri-O-acetyl-β-D-glucopyranosyluronate)-β-D-galactopyranoside
  参考文献：
  名称：

  Syntheses of the methyl glycosides of the repeating units of chondroitin 4- and 6-sulfate

  摘要：

  3,4,6-Tri-O-acetyl-D-galactal was transformed into methyl 6-O-acetyl-2-azido-4-O-benzyl-2-deoxy-beta-D-galactopyranoside and its 4-O-acetyl-6-O-benzyl analogue, each of which was glycosylated with activated, O-acetylated derivatives of methyl D-glucopyranosyluronate. The resulting beta-(1----3)-linked disaccharide derivatives were each reductively N-acetylated, hydrogenolysed, O-sulfated, and saponified to afford the disodium salts of methyl 2-acetamido-2-deoxy-3-O-(beta-D-glucopyranosyluronic acid)-4-O-sulfo-beta-D-galactopyranoside and the 6-O-sulfo analogue. D-Galactal was also transformed into activated derivatives of 2-azido-3,6-di-O-benzyl-2-deoxy-D-galactopyranose and their 3,4-di-O-benzyl analogues with various substituents at O-4 and O-6. These glycosyl donors were condensed with 6-O-protected derivatives of methyl 2,3-di-O-benzyl-beta-D-glucopyranoside to give the beta-(1----4)-linked disaccharide derivatives, which were selectively deprotected, then oxidised at C-6 of the gluco unit, reductively N-acetylated, selectively deprotected, O-sulfated at C-4 or C-6 of the galacto unit, and hydrogenolysed to give the disodium salts of methyl 4-O-(2-acetamido-2-deoxy-4-O-sulfo-beta-D-galactopyranosyl)-beta-D- glucopyranosiduronic acid and the 6-O-sulfo analogue.

  DOI：

  10.1016/0008-6215(90)84259-w
• 作为产物：
  描述：

  methyl 2-azido-2-deoxy-β-D-galactopyranoside 在 咪唑 、 甲醇 、 sodium hydride 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 为溶剂， 反应 17.25h， 生成 methyl 2-azido-4-O-benzyl-2-deoxy-β-D-galactopyranoside
  参考文献：
  名称：

  Syntheses of the methyl glycosides of the repeating units of chondroitin 4- and 6-sulfate

  摘要：

  3,4,6-Tri-O-acetyl-D-galactal was transformed into methyl 6-O-acetyl-2-azido-4-O-benzyl-2-deoxy-beta-D-galactopyranoside and its 4-O-acetyl-6-O-benzyl analogue, each of which was glycosylated with activated, O-acetylated derivatives of methyl D-glucopyranosyluronate. The resulting beta-(1----3)-linked disaccharide derivatives were each reductively N-acetylated, hydrogenolysed, O-sulfated, and saponified to afford the disodium salts of methyl 2-acetamido-2-deoxy-3-O-(beta-D-glucopyranosyluronic acid)-4-O-sulfo-beta-D-galactopyranoside and the 6-O-sulfo analogue. D-Galactal was also transformed into activated derivatives of 2-azido-3,6-di-O-benzyl-2-deoxy-D-galactopyranose and their 3,4-di-O-benzyl analogues with various substituents at O-4 and O-6. These glycosyl donors were condensed with 6-O-protected derivatives of methyl 2,3-di-O-benzyl-beta-D-glucopyranoside to give the beta-(1----4)-linked disaccharide derivatives, which were selectively deprotected, then oxidised at C-6 of the gluco unit, reductively N-acetylated, selectively deprotected, O-sulfated at C-4 or C-6 of the galacto unit, and hydrogenolysed to give the disodium salts of methyl 4-O-(2-acetamido-2-deoxy-4-O-sulfo-beta-D-galactopyranosyl)-beta-D- glucopyranosiduronic acid and the 6-O-sulfo analogue.

  DOI：

  10.1016/0008-6215(90)84259-w

文献信息

• Regioselective Glycosylations in Solution and on Soluble and Insoluble Polymeric Supports
  作者：Richard Geurtsen、Geert-Jan Boons

  DOI：10.1002/1099-0690(200205)2002:9<1473::aid-ejoc1473>3.0.co;2-o

  日期：2002.5

  A protected tetrasaccharide 13 derived from the mucin oligosaccharides surrounding oocytes of Xenopus laevis, was prepared by a two directional glycosylation methodology whereby an immobilized thioglycosyl donor 3 was coupled in solution in a regioselective manner with an acceptor 4 that has two hydroxyls of differing reactivity. High regioselectivity was achieved when MPEG was used as a polymeric support, whereas site-site reactions occurred when TentaGel((R)) was employed for immobilization.((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002).
• JACQUINET, JEAN-CLAUDE, CARBOHYDR. RES., 199,(1990) N, C. 153-181
  作者：JACQUINET, JEAN-CLAUDE

  DOI：——

  日期：——
• Syntheses of the methyl glycosides of the repeating units of chondroitin 4- and 6-sulfate
  作者：Jean-Claude Jacquinet

  DOI：10.1016/0008-6215(90)84259-w

  日期：1990.6

  3,4,6-Tri-O-acetyl-D-galactal was transformed into methyl 6-O-acetyl-2-azido-4-O-benzyl-2-deoxy-beta-D-galactopyranoside and its 4-O-acetyl-6-O-benzyl analogue, each of which was glycosylated with activated, O-acetylated derivatives of methyl D-glucopyranosyluronate. The resulting beta-(1----3)-linked disaccharide derivatives were each reductively N-acetylated, hydrogenolysed, O-sulfated, and saponified to afford the disodium salts of methyl 2-acetamido-2-deoxy-3-O-(beta-D-glucopyranosyluronic acid)-4-O-sulfo-beta-D-galactopyranoside and the 6-O-sulfo analogue. D-Galactal was also transformed into activated derivatives of 2-azido-3,6-di-O-benzyl-2-deoxy-D-galactopyranose and their 3,4-di-O-benzyl analogues with various substituents at O-4 and O-6. These glycosyl donors were condensed with 6-O-protected derivatives of methyl 2,3-di-O-benzyl-beta-D-glucopyranoside to give the beta-(1----4)-linked disaccharide derivatives, which were selectively deprotected, then oxidised at C-6 of the gluco unit, reductively N-acetylated, selectively deprotected, O-sulfated at C-4 or C-6 of the galacto unit, and hydrogenolysed to give the disodium salts of methyl 4-O-(2-acetamido-2-deoxy-4-O-sulfo-beta-D-galactopyranosyl)-beta-D- glucopyranosiduronic acid and the 6-O-sulfo analogue.