methyl 4-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-α-D-galactopyranosyl)-2,3,6-tri-O-benzyl-α-D-glucopyranoside | 139608-15-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 4-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-α-D-galactopyranosyl)-2,3,6-tri-O-benzyl-α-D-glucopyranoside
• 英文别名: methyl 2,3,6-tri-O-benzyl-4-O-(2-azide-2-deoxy-3,4,6-tri-O-benzyl-D-galactopyranosyl)-α-D-glucopyranoside；methyl 4-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-D-galactopyranosyl)-2,3,6-tri-O-benzyl-α-D-glucopyranoside；(2R,3R,4R,5R,6R)-3-azido-2-[(2R,3R,4S,5R,6S)-6-methoxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxane
• CAS: 139608-15-4
• 化学式: C₅₅H₅₉N₃O₁₀
• 分子量: 922.088
• InChiKey: KRQLLPIXGZSNNA-MNMINXCLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9
• 重原子数：
  68
• 可旋转键数：
  24
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  107
• 氢给体数：
  0
• 氢受体数：
  12

反应信息

• 作为产物：
  描述：

  methyl 4-O-acetyl-2,3,6-tri-O-benzyl-α-D-glucopyranoside 在 吡啶 、 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 、 titanocene dichloride 作用下， 以 乙腈 为溶剂， 反应 1.08h， 生成 methyl 4-O-(2-azido-3,4,6-tri-O-benzyl-2-deoxy-α-D-galactopyranosyl)-2,3,6-tri-O-benzyl-α-D-glucopyranoside
  参考文献：
  名称：

  Isopropenyl glycosides and congeners as novel classes of glycosyl donors: theme and variations

  摘要：

  Isopropenyl glycosides (i.e., 10 and 11) have been synthesized in high yields by reacting the corresponding anomeric acetates with the Tebbe reagent. These compounds undergo glycosylation with primary or secondary carbohydrate alcohols in the presence of trimethylsilyl triflate or boron trifluoride etherate, probably via a mixed acetal glycoside intermediate. On the basis of this principle, a quite efficient glycosylation of monosaccharide hemiacetal donors (i.e., 1, 7, and 9) with acceptors bearing an isopropenyl ether function at a primary or secondary position (i.e., 18 and 21) has been developed. Also investigated were the glycosylating properties of isopropenyl glucosyl and galactosyl carbonates (i.e., 12-15), easily prepared from the corresponding hemiacetals, toward sugar alcohols. In each case, the beta-selective synthesis of disaccharides from donors having nonparticipating groups at C-2 was ensured by the use of acetonitrile, at low temperature, as the solvent.

  DOI：

  10.1021/ja00042a010

文献信息

• <i>O</i>-Glycosylation Enabled by <i>N-</i>(Glycosyloxy)acetamides
  作者：Miao Liu、Bo-Han Li、De-Cai Xiong、Xin-Shan Ye

  DOI：10.1021/acs.joc.8b01003

  日期：2018.8.3

  A novel glycosylation protocol has been established by using N-(glycosyloxy)acetamides as glycosyl donors. The N-oxyacetamide leaving group in donors could be rapidly activated in the presence of Cu(OTf)2 or SnCl4 under microwave irradiation. This glycosylation process afforded the coupled products in high yields, and the reaction enjoyed a broad substrate scope, even for disarmed donors and hindered

  通过使用N-（糖基氧基）乙酰胺作为糖基供体已经建立了新的糖基化方案。在微波辐射下，存在Cu（OTf）2或SnCl 4的情况下，供体中的N-氧乙酰胺离去基团可以快速活化。该糖基化过程以高收率提供了偶联产物，并且该反应享有广泛的底物范围，即使对于缴械的供体和受阻的受体也是如此。供体的容易获得，N-（糖基氧基）乙酰胺的高稳定性以及小的离去基团使该方法非常实用。
• Direct Glycosidation of 2‐Azido‐2‐deoxyglycosyl Nitrates
  作者：Yashapal Singh、Tinghua Wang、Alexei V. Demchenko

  DOI：10.1002/ejoc.201900748

  日期：2019.10.9

  Direct glycosylation with 2‐azido nitrate donors has been described. This approach allows to streamline the synthesis of glycans containing amino sugars.

  已经描述了使用2-叠氮基硝酸盐供体的直接糖基化。这种方法可以简化含氨基糖聚糖的合成。
• A highly stereoselective construction of 1,2-trans-β-glycosidic linkages capitalizing on 2-azido-2-deoxy-d-glycosyl diphenyl phosphates as glycosyl donors
  作者：Toshifumi Tsuda、Seiichi Nakamura、Shunichi Hashimoto

  DOI：10.1016/j.tet.2004.08.076

  日期：2004.11

  The scope of TMSOTf-promoted glycosidation of 2-azido-2-deoxyglycopyranosyl diphenyl phosphates is investigated. The 3,4,6-tri-O-benzyl-protected glucosyl and galactosyl donors and the 4,6-O-benzylidene-protected galactosyl donor each react with a range of acceptor alcohols in the presence of a stoichiometric amount of TMSOTf in propionitrile at -78 degreesC to afford 1,2-trans-beta-linked disaccharides in high yields with alpha:beta ratios ranging from 9:91 to 1: > 99, regardless of the anomeric composition of the donor used. The use of propionitrile as a solvent at -78 degreesC has proven to be among the best choice for the highest levels of beta-selectivity reported to date for this type of glycosidation. A plausible reaction mechanism, which features a large equilibrium preference for alpha-glycosyl-nitrilium ions over beta-nitrilium ions, is proposed based on byproducts formed through their intermediacy and accounts for the observed excellent beta-selectivities. (C) 2004 Elsevier Ltd. All rights reserved.
• Isopropenyl glycosides and congeners as novel classes of glycosyl donors: theme and variations
  作者：Alberto Marra、Jacques Esnault、Alain Veyrieres、Pierre Sinay

  DOI：10.1021/ja00042a010

  日期：1992.7

  Isopropenyl glycosides (i.e., 10 and 11) have been synthesized in high yields by reacting the corresponding anomeric acetates with the Tebbe reagent. These compounds undergo glycosylation with primary or secondary carbohydrate alcohols in the presence of trimethylsilyl triflate or boron trifluoride etherate, probably via a mixed acetal glycoside intermediate. On the basis of this principle, a quite efficient glycosylation of monosaccharide hemiacetal donors (i.e., 1, 7, and 9) with acceptors bearing an isopropenyl ether function at a primary or secondary position (i.e., 18 and 21) has been developed. Also investigated were the glycosylating properties of isopropenyl glucosyl and galactosyl carbonates (i.e., 12-15), easily prepared from the corresponding hemiacetals, toward sugar alcohols. In each case, the beta-selective synthesis of disaccharides from donors having nonparticipating groups at C-2 was ensured by the use of acetonitrile, at low temperature, as the solvent.