[(2R,3S,4R,5R,6R)-3,4-diacetyloxy-6-(2,2,2-trichloroethanimidoyl)oxy-5-[[4-(trifluoromethyl)phenyl]methylideneamino]oxan-2-yl]methyl acetate | 1163723-37-2

• 分子结构分类: 有机化合物 - 苯类化合物
• 英文名称: [(2R,3S,4R,5R,6R)-3,4-diacetyloxy-6-(2,2,2-trichloroethanimidoyl)oxy-5-[[4-(trifluoromethyl)phenyl]methylideneamino]oxan-2-yl]methyl acetate
• CAS: 1163723-37-2
• 化学式: C₂₂H₂₂Cl₃F₃N₂O₈
• 分子量: 605.779
• InChiKey: GXECMZKKXCSUAR-FVVUREQNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  38
• 可旋转键数：
  11
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  134
• 氢给体数：
  1
• 氢受体数：
  13

反应信息

• 作为反应物：
  描述：

  甲基2,3,6-三-O-苄基-ALPHA-D-吡喃葡萄糖苷 、 [(2R,3S,4R,5R,6R)-3,4-diacetyloxy-6-(2,2,2-trichloroethanimidoyl)oxy-5-[[4-(trifluoromethyl)phenyl]methylideneamino]oxan-2-yl]methyl acetate 在 2CF₃O₃S^(1-)*C₂₈H₁₆F₄N₄Ni⁽²⁺⁾ 作用下， 以 二氯甲烷 为溶剂， 以84%的产率得到[(2R,3S,4R,5R,6R)-3,4-diacetyloxy-6-[(2R,3R,4S,5R,6S)-6-methoxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-5-[[4-(trifluoromethyl)phenyl]methylideneamino]oxan-2-yl]methyl acetate
  参考文献：
  名称：

  镍催化立体选择性糖基化与 C(2)-N-取代的亚苄基氨基葡萄糖和半乳糖胺三氯乙酰亚胺酸盐形成 1,2-顺-2-氨基糖苷。在肝素二糖、GPI 锚定假二糖和 α-GalNAc 合成中的应用

  摘要：

  1,2-cis-2-amino glycosides 是在各种生物学上重要的寡糖和糖肽中发现的关键成分。尽管 1,2-cis-2-氨基糖苷的合成取得了显着进展，但目前最先进方法的缺点包括底物范围有限、产率低、反应时间长和异头混合物。我们开发了一种通过镍催化的 α-选择性糖基化与 C(2)-N-取代的亚苄基 D-葡糖胺和半乳糖胺三氯乙酰亚胺合成 1,2-顺-2-氨基糖苷的新方法。这些糖基供体能够与多种醇偶联，以高产率提供具有出色 α 选择性的糖缀合物。此外，仅需要亚化学计量的镍 (5-10 mol%) 才能在 25 °C 下进行反应。目前的镍方法依赖于镍配体配合物的性质来控制 α 选择性。亲核试剂的反应位点或保护基团的性质对α-选择性几乎没有影响。该方法也已成功应用于二糖供体和受体，以高产率和 α 选择性提供相应的寡糖。镍过程的功效已进一步应用于制备肝素二糖、GPI 锚定假二糖和 α-Glu

  DOI：

  10.1021/ja106682m

文献信息

• Studies on the Selectivity Between Nickel-Catalyzed 1,2-<i>cis</i>-2-Amino Glycosylation of Hydroxyl Groups of Thioglycoside Acceptors with C(2)-Substituted Benzylidene <i>N</i>-Phenyl Trifluoroacetimidates and Intermolecular Aglycon Transfer of the Sulfide Group
  作者：Fei Yu、Hien M. Nguyen

  DOI：10.1021/jo301050q

  日期：2012.9.7

  glycoconjugates bearing the 1,2-cis-2-amino glycosidic linkages because the saccharide thioglycosides obtained can serve as donors for another coupling iteration. This approach streamlines selective deprotection and anomeric derivatization steps prior to the subsequent coupling event. We have developed an efficient approach for the synthesis of highly yielding and α-selective saccharide thioglycosides containing

  包含 1,2-顺式-2-氨基糖苷键的糖硫糖苷的立体选择性合成具有挑战性。除了在 1,2-顺式-2-氨基糖苷键形成中实现高α-选择性的困难之外，糖基化反应还受到异头硫化物基团从糖基受体到糖基供体的不希望的转移的阻碍。克服这些障碍将为制备带有 1,2-顺式分子的寡糖和糖缀合物铺平道路。-2-氨基糖苷键，因为获得的糖硫糖苷可以作为另一次偶联迭代的供体。这种方法在随后的偶联事件之前简化了选择性去保护和异头衍生化步骤。我们开发了一种有效的方法来合成含有 1,2-顺式-2-氨基糖苷键的高产率和 α-选择性糖硫糖苷，通过阳离子镍催化的带有 2-三氟甲基苯基苷元的硫糖苷受体的糖基化与N-苯基三氟乙酰亚胺酯供体。2-三氟甲基苯基有效地阻止异头硫化物基团从糖基受体转移到 C(2)-亚苄基供体，并且易于安装和激活。目前的方法还突出了镍催化剂在糖基受体上存在异头硫化物基团的情况下选择性活化 C(2)-亚苄基亚胺酯基团的功效。
• Nickel-catalyzed α-glycosylation of C(1)-hydroxyl<scp>d</scp>-myo-inositol: a formal synthesis of mycothiol
  作者：Matthew S. McConnell、Fei Yu、Hien M. Nguyen

  DOI：10.1039/c2cc35823a

  日期：——

  Formal synthesis of mycothiol has been developed via nickel-catalyzed α-glycosylation of the C(1)-hydroxyl group of D-myo-inositols with C(2)-N-substituted benzylideneamino N-phenyl trifluoroacetimidate donors. The pseudo-oligosaccharides were obtained in good yield and with excellent α-selectivity. Removal of the C(2)-N-2-trifluoromethylphenyl-benzylidene group under mild conditions provides a pseudo-disaccharide, completing the formal synthesis of mycothiol.

  mycothiol 的正式合成是通过镍催化 D-myo-肌醇的 C(1)-羟基与 C(2)-N-取代的亚苄基氨基 N-苯基三氟乙酰亚胺酯供体的 α-糖基化来开发的。所获得的假低聚糖具有良好的产率和优异的α选择性。在温和条件下去除C(2)-N-2-三氟甲基苯基-亚苄基基团提供假二糖，完成菌硫醇的正式合成。
• Nickel-Catalyzed Stereoselective Formation of α-2-Deoxy-2-Amino Glycosides
  作者：Enoch A. Mensah、Hien M. Nguyen

  DOI：10.1021/ja903123b

  日期：2009.7.1

  The development of a new method for the stereoselective synthesis of alpha-2-deoxy-2-amino glycosides is described. This methodology relies on the nature of the cationic nickel catalyst, generated in situ from L0NiCl2 and AgOTf, to direct the anomeric stereoselectivity. The new glycosylation reaction is highly a-selective and proceeds under mild conditions with 5-10 mol % of the nickel catalyst Loading at ambient temperature. This new method has been applied to both D-glucosamine and galactosamine trichloroacetimidate donors as well as an array of primary, secondary, and tertiary alcohol nucleophiles to provide the desired glycoconjugates in good yields with excellent alpha-selectivity. Mechanistic studies of the present reaction are underway and will be reported in due course.
• Stereoselective α-glycosylation of C(6)-hydroxyl myo-inositols via nickel catalysis—application to the synthesis of GPI anchor pseudo-oligosaccharides
  作者：Matthew S. McConnell、Enoch A. Mensah、Hien M. Nguyen

  DOI：10.1016/j.carres.2013.09.006

  日期：2013.11

  Glycosylphosphatidyl inositol (GPI) anchors play a key role in many eukaryotic biological pathways. Stereoselective synthesis of GPI anchor analogues have proven to be critical for probing the biosynthesis, structure, and biological properties of these compounds. Challenges that have emerged from these efforts include the preparation of the selectively protected myo-inositol building blocks and the stereoselective construction of glucosamine alpha-linked myo-inositol containing pseudodisaccharide units. Herein, we describe the effectiveness of the cationic nickel(II) catalyst, Ni(4-F-PhCN)(4)(OTf)(2), at promoting selective formation of 1,2-cis-2-amino glycosidic bonds between the C(2)-N-substituted benzylideneamino trihaloacetimidate donors and C(6)-hydroxyl myo-inositol acceptors. This catalytic coupling process allows rapid access to pseudosaccharides of GPI anchors in good yields and with excellent levels of a-selectivity (alpha:beta = 10:1-20:1). In stark contrast, activation of trichloroacetimidate donors containing the C(2)-N-substituted benzylidene group with TMSOTf and BF3.OEt2 provided the desired pseudodisaccharides as a 1: 1 mixture of alpha- and beta-isomers. (C) 2013 Elsevier Ltd. All rights reserved.