methyl 2-O-benzoyl-3,6-di-O-benzyl-α-D-glucopyranoside | 160529-97-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2-O-benzoyl-3,6-di-O-benzyl-α-D-glucopyranoside
• 英文别名: [(2S,3R,4S,5R,6R)-5-hydroxy-2-methoxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-3-yl] benzoate
• CAS: 160529-97-5
• 化学式: C₂₈H₃₀O₇
• 分子量: 478.542
• InChiKey: HBMIOOKUAYTDEK-CBNWRBMVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  35
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.32
• 拓扑面积：
  83.4
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  methyl 2-O-benzoyl-3,6-di-O-benzyl-α-D-glucopyranoside 在 palladium on activated charcoal 吡啶 、 氢气 、 tris(dimethylamino)sulfonium trimethylsilyldifluoride 作用下， 以 乙醇 、 二氯甲烷 、 丙酮 为溶剂， 反应 41.0h， 生成 methyl 4-deoxy-4-fluoro-α-d-galactopyranoside
  参考文献：
  名称：

  与痢疾志贺氏菌1型的O-多糖有关的特定单氟化配体的合成

  摘要：

  据报道合成了在3、4或6位单氟化并分别由4，6-O-亚苄基，3，6-二-O-苄基或3，4-O-异亚丙基保护的半乳糖吡喃糖亲核体。这些亲核试剂与2,3,4-三-O-苯甲酰基-α-L-鼠李糖基溴缩合后，脱保护后得到甲基O-α-L-鼠李糖基-（1-> 2）-的二糖类似物。 α-D-半乳糖吡喃糖苷，在半乳糖苷残基的3、4或6位单氟化。

  DOI：

  10.1016/0008-6215(94)84194-2
• 作为产物：
  描述：

  methyl 2-O-benzoyl-4,6-di-O-benzylidene-α-D-glucopyranoside 在 盐酸 、 三氟甲磺酸 、 sodium cyanoborohydride 作用下， 以 四氢呋喃 、 乙醚 、 二氯甲烷 为溶剂， 反应 8.0h， 生成 methyl 2-O-benzoyl-3,6-di-O-benzyl-α-D-glucopyranoside
  参考文献：
  名称：

  Synthesis and NMR Characterisation of Methyl Mono- and Di-O-α-L-Rhamnopyranosyl-α-D-Glucopyranosiduronic Acids

  摘要：

  DOI：

  10.1080/07328309908543980

文献信息

• METHOD FOR PREPARING HEXOSE DERIVATIVES
  申请人：Hung Shang Cheng

  公开号：US20090105466A1

  公开（公告）日：2009-04-23

  A method for preparing hexose derivatives comprises the steps of providing a silylated hexose, treating the silylated hexose with a first carbonyl compound in the presence of a catalyst to form an ketalized hexose, treating the ketalized hexose with a second carbonyl compound followed by treating with a first reductant to form an etherized hexose, and converting the etherized hexose into a target hexose derivative, which can be 2-alcohol hexose, 3-alcohol hexose, 4-alcohol hexose, or a 6-alcohol hexose. In particular, the present invention can prepare the hexose derivatives with highly regioselective scheme to protect individual hydroxyls of monosaccharide units and install an orthogonal protecting group pattern in a one-pot manner

  制备己糖衍生物的方法包括以下步骤：提供硅烷基化的己糖，将硅烷基化的己糖与第一羰基化合物在催化剂存在下处理，形成缩酮化的己糖，将缩酮化的己糖与第二羰基化合物处理后，再用第一还原剂处理，形成醚化的己糖，并将醚化的己糖转化为目标己糖衍生物，可以是2-醇己糖、3-醇己糖、4-醇己糖或6-醇己糖。具体来说，本发明可以采用高度选择性的方案制备己糖衍生物，以保护单糖单元的各个羟基，并以一锅法安装正交保护基图案。
• Mapping the Relationship between Glycosyl Acceptor Reactivity and Glycosylation Stereoselectivity
  作者：Stefan van der Vorm、Jacob M. A. van Hengst、Marloes Bakker、Herman S. Overkleeft、Gijsbert A. van der Marel、Jeroen D. C. Codée

  DOI：10.1002/anie.201802899

  日期：2018.7.2

  The reactivity of both coupling partners—the glycosyl donor and acceptor—is decisive for the outcome of a glycosylation reaction, in terms of both yield and stereoselectivity. Where the reactivity of glycosyl donors is well understood and can be controlled through manipulation of the functional/protecting‐group pattern, the reactivity of glycosyl acceptor alcohols is poorly understood. We here present

  就产量和立体选择性而言，两个偶联伙伴（糖基供体和受体）的反应性对糖基化反应的结果都具有决定性作用。如果对糖基供体的反应性了解得很好，并且可以通过功能/保护基团模式的控制来控制，则对糖基受体醇的反应性了解得很少。我们在这里提出了一个操作简单的系统来评估糖基受体的反应性，该系统采用了两个构象锁定的供体，其立体选择性严格取决于亲核试剂的反应性。筛选了大量受体，并建立了它们的结构-反应性/立体选择性关系。通过系统地改变保护基，可以调节糖基受体的反应性以获得立体选择性。顺式葡萄糖基化。
• Some observations on the reductive ring opening of 4,6-O-benzylidene acetals of hexopyranosides with the borane trimethylamine–aluminium chloride reagent
  作者：Katalin Daragics、Pál Szabó、Péter Fügedi

  DOI：10.1016/j.carres.2011.04.046

  日期：2011.9

  Reductive ring openings of 3-O-benzoyl-4,6-O-benzylidene-D-glucopyranosides with BH(3).NMe(3)-AlCl(3) are accompanied by side reactions, such as debenzoylation and reduction of the benzoate to benzyl ether. This phenomenon was rationalized by aluminium chelate formation between the O-4 acetal and the benzoyl carbonyl group oxygens. It was also shown that these side reactions can be eliminated by using

  3-O-苯甲酰基-4,6-O-亚苄基-D-吡喃葡萄糖苷与BH（3）.NMe（3）-AlCl（3）的还原性开环伴随有副反应，例如脱苯甲酰化和苯甲酸酯的还原苯甲基醚。通过在O-4乙缩醛和苯甲酰基羰基氧之间形成铝螯合物，可以合理地解释这种现象。还显示可以通过使用BH（3）.THF作为还原剂消除这些副反应。
• Synthesis of methyl O-α-L-rhamnopyranosyl-(1 → 2)-α-d-galactopyranosides specifically deoxygenated at position 3, 4, or 6 of the galactose residue
  作者：Laurence A. Mulard、Pavol Kovác̆、Cornelis P.J. Glaudemans

  DOI：10.1016/0008-6215(94)84287-6

  日期：1994.1

  4-tri-O-benzoyl-alpha-L-rhamnopyranosyl bromide with suitably protected, deoxygenated derivatives of methyl alpha-D-galactopyranoside. Deoxygenation was achieved via activation of a protected methyl alpha-D-gluco- or galacto-pyranoside with N,N'-thiocarbonyldiimidazole followed by treatment with tributyltin hydride and azobisisobutyronitrile. At position 3, the deoxygenation was more successful when performed with

  通过将2,3,4-三-O-苯甲酰基-α-L-鼠李糖基吡喃糖基溴化物与适当保护的甲基α-D-吡喃半乳糖苷的脱氧衍生物缩合来合成标题二糖。通过用N，N'-硫代羰基二咪唑活化被保护的甲基α-D-葡萄糖或半乳糖吡喃糖苷，然后用氢化三丁基锡和偶氮二异丁腈处理，可以实现脱氧。在位置3，当用三-O-苯甲酰化的前体而不是三-O-苄基化的前体进行脱氧更成功。通过甲基3-脱氧-α-D-木糖己吡喃糖苷的苄基化获得相应的亲核试剂。可以从具有D-半乳糖或D-葡萄糖构型的衍生物开始进行在位置4上脱氧的糖基受体的制备。
• HClO4–silica-catalysed regioselective opening of benzylidene acetals and its application towards regioselective HO-4 glycosylation of benzylidene acetals in one-pot
  作者：Saidulu Dara、Varma Saikam、Mahipal Yadav、Parvinder Pal Singh、Ram A. Vishwakarma

  DOI：10.1016/j.carres.2014.01.011

  日期：2014.6

  Here we report a high-yielding method for the regioselective reductive ring opening of 4,6-O-benzylidene acetals of hexapyranosides using inexpensive and robust HClO4-SiO2 as the acidic catalyst and triethyl-silane as the hydride donor. Under the optimized condition, gluco-and mannopyranosides give the respective 6-O-benzyl derivative in good to excellent yields while the corresponding galactopyranoside gives the corresponding 6-O-benzyl derivative in lower yield. As the optimized condition involves acidic catalyst, we also successfully developed further application of the present method for the tandem regioselective opening and glycosylation in one-pot. (C) 2014 Elsevier Ltd. All rights reserved.