phenyl 3-O-benzoyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside | 213997-89-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 3-O-benzoyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside
• CAS: 213997-89-8
• 化学式: C₂₆H₂₄O₆S
• 分子量: 464.539
• InChiKey: GVVABPBINXKKBE-YTUIUPOLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.2
• 重原子数：
  33.0
• 可旋转键数：
  5.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  74.22
• 氢给体数：
  1.0
• 氢受体数：
  7.0

反应信息

• 作为反应物：
  描述：

  phenyl 3-O-benzoyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside 在 四丁基碘化铵 、 silver(l) oxide 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 48.0h， 以95%的产率得到Benzoic acid (2S,4aR,6S,7R,8S,8aR)-8-hydroxy-2-phenyl-6-phenylsulfanyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl ester
  参考文献：
  名称：

  Cesium Trifluoroacetate or Silver Oxide Mediated Acyl Migration for the Construction of Disaccharide Building Blocks

  摘要：

  基于 CsO2CCF3 或 Ag2O 介导的酰基迁移，一种选择性区分吡喃糖苷的 2-OH 和 3-OH 的简便方法已经建立。2-OH 和 3-OH 可以依次被所需的碳水化合物糖基化，生成生物所需的二糖。提出了一种涉及酸或碱辅助酰基迁移的机制。

  DOI：

  10.1055/s-2006-933105
• 作为产物：
  描述：

  苯甲醛二甲缩醛 在 N,N-二异丙基乙胺 、 tin(ll) chloride 作用下， 以 乙腈 为溶剂， 反应 1.0h， 生成 phenyl 3-O-benzoyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  用于合成正交保护糖基受体的 SnCl2 催化乙酰化/选择性苯甲酰化序列

  摘要：

  基于 SnCl 2催化的缩醛化和选择性苯甲酰化，开发了一种高效合成具有 2-OH/3-OH 的正交保护糖基受体的一锅法。

  DOI：

  10.1002/ejoc.202101565

文献信息

• Total Synthesis of the Echinodermatous Ganglioside LLG-3 Possessing the Biological Function of Promoting the Neurite Outgrowth
  作者：Yu-Fa Wu、Yow-Fu Tsai、Yuahn-Sieh Huang、Jing-Feng Shih

  DOI：10.1021/acs.orglett.0c02692

  日期：2020.10.2

  A total synthesis of echinodermatous ganglioside LLG-3 with neuritogenic activity was accomplished by a convergent strategy. The synthesis of 2-hydroxyethyl 8-O-Me-α-sialoside 2 was started from the phenyl 7,8-di-O-Pico-thiosialoside 5, which can be chemoselectively removed the picoloyl group, and then the methyl group in 8-O-MeNeu5Ac moiety was chemoselectively prepared using TMSCHN2/FeCl3. For preparation

  棘皮性神经节苷脂 LLG-3 具有神经元活性的全合成是通过收敛策略完成的。2-羟乙基8- O -Me-α-sialoside 2的合成是从苯基7,8- di- O -Pico-thiosialoside 5 开始的，它可以化学选择性地去除吡啶甲酰基，然后是8中的甲基- ø -MeNeu5Ac部分使用化学选择性TMSCHN制备2 /的FeCl 3。为了制备末端二唾液酸单元，我们小组最初利用氧化酰胺化来有效构建 8- O的 α(2,11) 键-Me-Neu5Acα(2,11)Neu5Gc。在此，我们还证明合成的神经节苷脂 LLG-3 表现出对初级皮质神经元的神经元活性，并且生物活性优于神经节苷脂 DSG-A。
• Nickel(II) Chloride-Mediated Regioselective Benzylation and Benzoylation of Diequatorial Vicinal Diols
  作者：Alexei V. Demchenko、Umesh B. Gangadharmath

  DOI：10.1055/s-2004-831318

  日期：——

  Ni(II)-chelates of monosaccharide vicinal diols were found to be useful intermediates in regioselective monobenzylation and monobenzoylation. It was observed that the substitution occurs exclusively at the position adjacent to the axially oriented substituent of the pyranose ring, for example, at C-2 of α-D-gluco and at C3 of β-D-galacto.

  发现单糖邻二醇的 Ni(II)-螯合物是区域选择性单苄基化和单苯甲酰化的有用中间体。观察到取代仅发生在与吡喃糖环的轴向取代基相邻的位置，例如，在α-D-葡萄糖的C-2和β-D-半乳糖的C3。
• Sonochemistry:  A Powerful Way of Enhancing the Efficiency of Carbohydrate Synthesis
  作者：Shenglou Deng、Umesh Gangadharmath、Cheng-Wei Tom Chang

  DOI：10.1021/jo060374w

  日期：2006.7.1

  [GRAPHICS]Using sonication as a means of facilitating organic reactions in carbohydrate chemistry was explored under the conditions used for traditional organic synthesis. An array of representative reactions, including hydroxy group manipulation ( acylation, protection/deprotection, acyl group migration), thioglycoside synthesis, azidoglycoside synthesis, 1,3-dipolar cycloaddition and reductive cleavage of benzylidene, commonly used in the synthesis of carbohydrate derivatives was examined. A series of glycosylation reactions that employ thioglycosides, glycosyl trichloroacetimidate, glycosyl bromide and glycosyl acetate as the glycosyl donors was also examined. Our results demonstrate that sonication can significantly shorten the reaction time, enhance the reactivity of reactant and lead to superior yield and excellent stereoselectivity. More importantly, a general protocol of glycosylation may finally be developed. Sonication is compatible to the conditions used for traditional organic synthesis. We believe that sonication can also be applied to other areas of synthetic processes.