methyl 4,6-O-benzylidene-2-deoxy-β-D-arabino-hexopyranoside | 131615-73-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: methyl 4,6-O-benzylidene-2-deoxy-β-D-arabino-hexopyranoside
• CAS: 131615-73-1
• 化学式: C₁₄H₁₈O₅
• 分子量: 266.294
• InChiKey: FHXCXDUEKHFWGP-XGFWRYKXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.22
• 重原子数：
  19.0
• 可旋转键数：
  2.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  57.15
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  乙酸酐 、 methyl 4,6-O-benzylidene-2-deoxy-β-D-arabino-hexopyranoside 以 吡啶 为溶剂， 生成 methyl 3-O-acetyl-4,6-O-benzylidene-2-deoxy-β-D-arabino-hexopyranoside
  参考文献：
  名称：

  亲核试剂对碳水化合物α-硝基环氧化物的脱硝作用

  摘要：

  摘要分别用甲基和苯基2,3-脱水-4,6-O-亚苄基-3-脱氧-3-硝基-β-d-吡喃吡喃糖苷处理了几个亲核试剂，得到了2-取代的aldos-3-ulose衍生物。在后一种情况下，总是发生随后的无糖基苯基的β-消除，以提供相应的糖基。还讨论了其反应机理。

  DOI：

  10.1016/0008-6215(87)80183-0
• 作为产物：
  描述：

  (2R,4aR,6R,7R,8R,8aS)-6-Methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxine-7,8-diol 在 吡啶 、 六正丁基二锡 作用下， 以 1,4-二氧六环 、 苯 为溶剂， 反应 3.17h， 生成 methyl 4,6-O-benzylidene-2-deoxy-β-D-arabino-hexopyranoside
  参考文献：
  名称：

  Utilization of Sugars in Organic Synthesis. Part XXXIII. Thio-Sugars III. Radical Catalyzed Thione-Thiol Rearrangement of Cyclic Thionocarbonates on a Pyranose Ring: Formation of cis-Arranged Cyclic Thiolcarbonates.

  摘要：

  吡喃糖苷 3, 4-顺式硫代碳酸酯在自由基促进的反应条件下（方法 A、B 或 C，如本文所述）以可接受的产率生成 O-S 重排产物，即顺式立体化学的 3, 4-硫醇碳酸酯。2在方法B（用六丁基二锡烷光解）中，反式立体化学的3-硫代碳酸酯也优先产生顺式立体化学的重排产物。尽管在大多数情况下产物的区域控制并不令人满意，但一些结果表明反应的区域选择性明显受到底物异头位置的立体化学的影响。通过常规方法将产物转化为硫代糖苷（全乙酸盐形式）。

  DOI：

  10.1248/cpb.45.971

文献信息

• Substrate Flexibility of Vicenisaminyltransferase VinC Involved in the Biosynthesis of Vicenistatin
  作者：Atsushi Minami、Tadashi Eguchi

  DOI：10.1021/ja0685250

  日期：2007.4.1

  A glycosyltransferase VinC is involved in the biosynthesis of antitumor beta-glycoside antibiotic vicenistatin. It catalyzes a glycosyl transfer reaction between dTDP-alpha-D-vicenisamine and vicenilactam. Previous identification of its broad substrate specificity toward various glycosyl acceptors enabled us to explore the potential of VinC for glycodiversification. In vitro study of the substrate specificity toward several dTDP-sugars with vicenilactam established that VinC displayed activities with alpha-anomers of several dTDP-2-deoxy-D-sugars such as mycarose, digitoxose, olivose, and 2-deoxyglucose to afford respective beta-glycosides. Notably, beta-anomers of dTDP-2-deoxy-D-sugars also appeared to be accepted by VinC to form alpha-glycosides. Furthermore, VinC is capable of catalyzing glycosyl transfer reactions from both the alpha-anomer and beta-anomer of dTDP-L-mycarose, respectively, into beta-glycoside and alpha-glycoside. These results indicate that VinC is a unique glycosyltransferase possessing broad substrate specificity. The mechanism of this axially oriented glycosidic bond formation from the equatorially oriented dTDP-sugar might be explained by conformational change of dTDP-sugar to a boat conformation during the glycosyl transfer reaction. To apply these features of VinC for glycodiversification, 22 sets of structurally diverse glycosides were constructed using unnatural glycosyl donors and acceptors.