allyl 2-acetamido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranoside | 50827-17-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: allyl 2-acetamido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranoside
• 英文别名: Bn(-3)[Bn(-4)][Bn(-6)]GlcNAc(b)-O-allyl；N-[(2R,3R,4R,5S,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)-2-prop-2-enoxyoxan-3-yl]acetamide
• CAS: 50827-17-3
• 化学式: C₃₂H₃₇NO₆
• 分子量: 531.649
• InChiKey: AILZHWLLIANFHL-NYDDOVQGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  39
• 可旋转键数：
  14
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  75.2
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  allyl 2-acetamido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranoside 在 potassium tert-butylate 、 mercury dichloride 、 mercury(II) oxide 作用下， 以 二甲基亚砜 、 乙腈 为溶剂， 反应 0.08h， 生成 2-amino-3,4,6-tri-O-benzyl-2-deoxy-1-O,2-N-(ethan-1-yl-1-ylidene)-α-D-glucopyranose
  参考文献：
  名称：

  O-benzylated oxazoline derivatives of 2-acetamido-2-deoxy-d-glucopyranose from 1-propenyl glycosides. synthesis of the propenyl glycosides and their direct cyclization

  摘要：

  DOI：

  10.1016/s0008-6215(00)85700-6
• 作为产物：
  描述：

  2-acetamido-3,4,6-tri-O-benzyl-2-deoxy-D-glucopyranose 在 bismuth(lll) trifluoromethanesulfonate 、 吡啶 作用下， 以 二氯甲烷 为溶剂， 反应 38.0h， 生成 allyl 2-acetamido-3,4,6-tri-O-benzyl-2-deoxy-β-D-glucopyranoside
  参考文献：
  名称：

  为什么用N-乙酰氨基葡糖供体直接糖基化如此差的反应，该怎么办？

  摘要：

  单糖N-乙酰基-d-葡糖胺（GlcNAc）是天然存在的低聚糖中丰富的组成部分，但是由于直接反应的收率低，因此通过化学糖基化的方法引入葡糖胺极具挑战性。通常认为是由中间体1,2-恶唑啉引起的此问题通常通过引入额外的合成步骤来避免，以避免在糖基化过程中出现NHAc官能团。本文介绍了对使用GlcNAc执行直接糖基化的内在挑战的新的基本机械学见解。这些结果表明，控制恶唑啉形成和糖基化的平衡是获得可接受的化学收率的关键。通过运用这种推理方法直接与GlcNAc的传统硫糖苷供体直接进行糖基化，否则其糖基化收率不佳，

  DOI：

  10.1021/acs.joc.6b02305

文献信息

• In Situ Generated Bulky Palladium Hydride Complexes as Catalysts for the Efficient Isomerization of Olefins. Selective Transformation of Terminal Alkenes to 2-Alkenes
  作者：Delphine Gauthier、Anders T. Lindhardt、Esben P. K. Olsen、Jacob Overgaard、Troels Skrydstrup

  DOI：10.1021/ja9108424

  日期：2010.6.16

  enriched substrates provided products without epimerization at the allylic stereogenic carbon centers. Finally, some mechanistic investigations were undertaken to understand the nature of the active in situ generated Pd-H catalyst. These studies revealed that the catalytic system is highly dependent on the large steric demand of the P(tBu)(3) ligand. The use of an alternative ligand, cataCXium PinCy, also

  应用从 Pd(dba)(2)、P(tBu)(3) 和异丁酰氯的 1:1:1 混合物中获得的原位生成的大块钯 (II) 氢化物催化剂为异构化和多种烯烃的迁移。除了 (Z)- 到 (E)-烯烃的异构化之外，烯丙基苯、烯丙基醚和胺的共轭迁移以接近定量的产率和优异的官能团耐受性有效实现。通常使用 0.5-1.0 mol% 的催化剂负载量，但当反应在纯净条件下进行时，甚至可以实现低至 0.25 mol% 的负载量。更有趣的是，所研究的催化剂证明对将末端烯烃转化为 2-烯烃具有选择性。这种单取代烯烃的单碳迁移过程提供了一种替代催化剂，它弥合了烯丙基化和丙烯酰化/乙烯基化协议之间的差距。几种底物，包括高烯丙醇和胺，被选择性地转化为它们相应的 2-烯烃，使用对映体富集底物的例子提供了在烯丙基立体碳中心没有差向异构化的产物。最后，进行了一些机理研究以了解活性原位生成的 Pd-H 催化剂的性质。这些研究表明，催化系统高度依赖于
• Protected glycosides and disaccharides of 2-amino-2-deoxy-d-glucopyranose by ferric chloride-catalyzed coupling
  作者：Makoto Kiso、Laurens Anderson

  DOI：10.1016/0008-6215(85)85205-8

  日期：1985.2

  N-chloroacetyl, and N-phthaloyl congeners of 3. The latter compounds, except for the N-phthaloyl derivative, gave oxazolines in the absence of an alcoholic reactant. Compound 3 and the related N-benzoyl, N-chloroacetyl, N-acetyl-3,4,6-tri-O-benzyl, and N-acetyl-4-O-acetyl-3,6-di-O-benzyl derivatives were coupled to one or more protected sugars to form protected, beta-linked disaccharides. Coupling

  描述了受保护的2-酰基氨基-2-脱氧-β-D-吡喃葡萄糖1-乙酸盐的氯化铁催化的羟基化合物的糖基化。除了醇与2-乙酰氨基-1,3,4,6-四-O-乙酰基-2-脱氧-β-D-吡喃葡萄糖（3），烯丙基（和其他烷基）β-糖苷是从3的N-苯甲酰基，N-苯氧基乙酰基，N-甲氧基乙酰基，N-氯乙酰基和N-邻苯二甲酰基同系物获得的。除了N-邻苯二甲酰基衍生物以外，后一种化合物在不存在醇类反应物的情况下生成恶唑啉。化合物3和相关的N-苯甲酰基，N-氯乙酰基，N-乙酰基-3,4,6-三-O-苄基和N-乙酰基-4-O-乙酰基-3,6-二-O-苄基衍生物将其与一种或多种受保护的糖偶联以形成受保护的，β-连接的二糖。受体6位的偶联反应顺利进行，收率为67-80％。为了在位置3和4上成功偶联，需要较长的反应时间和多次添加糖基供体，收率范围从60％到低至30％。1,3,4,6-四-O-乙酰基-2-（氯乙酰胺基）-2-
• Formation of 2-Acetamido-2-deoxy-D-glucopyranosidic Linkages via Glycosidation Using a Combination of Two Lewis Acids
  作者：Takashi Yamanoi、Yoshiki Oda、Masanobu Midorikawa

  DOI：10.3987/com-14-s(k)4

  日期：——

  A mixed activation system composed of ytterbium(III) triflate and a catalytic boron trifluoride diethyl etherate complex efficiently promotes the glycosylation of various alcohol acceptors using 2-acetamido-3,4,6-tri-O-benzy1-2-deoxy-alpha-D-glucopyranosyl acetate in dichloromethane at room temperature to afford 2-acetamido-2-deoxy-D-glucopyranosides in good yields with significant formation of the alpha-isomers. Notably, stereoselective glycosylations of phenol derivatives as the acceptors afforded aryl 1,2-cis-alpha-glycosides without the formation of any beta-isomers. This highly stereocontrolled 1,2-cis-alpha-glycosidation was applied to the synthesis of a novel hydroquinone alpha-glycoside.
• Formation of 1,2-cis-α-Aryl-glycosidic Linkages Directly from 2-Acetamido-2-deoxy-D-glucopyranosyl Acetate by the Mixed Activating System Using Ytterbium(III) Triflate and Catalytic Boron Trifluoride Diethyl Etherate Complex
  作者：Takashi Yamanoi、Masanobu Midorikawa、Yoshiki Oda

  DOI：10.3987/com-13-s(s)44

  日期：——

  We found that a mixed activating system using ytterbium(III) triflate and a catalytic boron trifluoride diethyl etherate complex efficiently promoted glycosidation of the 2-acetamido-3,4,6-tri-O-benzyl-2-deoxy-alpha-D-glucopyranosyl acetate in dichloromethane at room temperature to afford 2-acetamido-2-deoxy-D-glucopyranosides in good yields along with the formation of a considerable amount of alpha-isomers. Glycosylations of the aryl alcohols as the acceptors stereoselectively afforded aryl alpha-glycosides without producing any beta-isomers.
• Synthesis of Alkyl Glycosides Using Trialkyl Borates
  作者：Takashi Yamanoi、Yoshihiro Iwai、Toshiyuki Inazu

  DOI：10.3987/com-00-8899

  日期：——

  Some trialkyl berates worked as highly reactive glycosyl accepters of glycosyl acetates. Several allyl glycosides were obtained in good yields by the reaction of glycosyl acetates with triallyl berate using ytterbium(III) trifluoromethanesulfonate as the activator.