2,3,4-Tri-O-benzoyl-α-D-xylopyranosyl chloride | 32445-43-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2,3,4-Tri-O-benzoyl-α-D-xylopyranosyl chloride
• 英文别名: [(3R,4S,5R,6R)-4,5-dibenzoyloxy-6-chlorooxan-3-yl] benzoate
• CAS: 32445-43-5
• 化学式: C₂₆H₂₁ClO₇
• 分子量: 480.902
• InChiKey: SREXSZGSSMCDKE-ACESQOTJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.5
• 重原子数：
  34
• 可旋转键数：
  9
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  88.1
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  D-木糖 、 苯甲酰氯 在 indium(III) triflate 作用下， 反应 4.0h， 以75%的产率得到2,3,4-Tri-O-benzoyl-α-D-xylopyranosyl chloride
  参考文献：
  名称：

  Indium(III) Triflate–Mediated One-Step Preparation of Glycosyl Halides from Free Sugars

  摘要：

  In(OTf)3 has been found to be an efficient catalyst for the direct conversion of reducing sugars to their respective acylated glycosyl halides in good yields under mild conditions. The glycosyl halides so obtained can be converted to alkyl glycosides in the same pot by reacting them with the respective alcohols in good yield.

  DOI：

  10.1080/00397910903419886

文献信息

• Synthesis of Glycosyl Chlorides and Bromides by Chelation Assisted Activation of Picolinic Esters under Mild Neutral Conditions
  作者：Peng Wen、Christopher J. Simmons、Zhi-xiong Ma、Stephanie A. Blaszczyk、Paul G. Balzer、Wenjing Ye、Xiyan Duan、Hao-Yuan Wang、Dan Yin、Christopher M. Stevens、Weiping Tang

  DOI：10.1021/acs.orglett.0c00078

  日期：2020.2.21

  formation of glycosyl chlorides and bromides from picolinic esters under mild and neutral conditions. Benchtop stable picolinic esters are activated by a copper(II) halide species to afford the corresponding products in high yields with a traceless leaving group. Rare β glycosyl chlorides are accessible via this route through neighboring group participation. Additionally, glycosyl chlorides with labile protecting

  已经开发了在温和和中性条件下由吡啶甲酸酯形成糖基氯化物和溴化物的通用方法。台式稳定的吡啶甲酸酯被卤化铜（II）物种活化，以高收率提供具有无痕离去基团的相应产品。通过邻族参与，可通过此途径获得稀有的β糖基氯。另外，可以制备具有先前不易获得的具有不稳定保护基的糖基氯化物。
• Lewis acid promoted anomerisation of alkyl O- and S-xylo-, arabino- and fucopyranosides
  作者：Lisa M. Doyle、Fiach B. Meany、Paul V. Murphy

  DOI：10.1016/j.carres.2018.11.010

  日期：2019.1

  and 6-deoxyhexopyranosides, such as those from d-xylose, l-arabinose and l-fucose are components of natural products, oligosaccharides or polysaccharides. Lewis acid promoted anomerisation of some of their alkyl O- and S-glycopyranosides is reported here. SnCl4 was more successful than TiCl4, with the latter giving the glycosyl chloride by-product in some cases, and both were superior to BF3OEt2. Kinetics

  戊吡喃糖苷和6-脱氧己吡喃糖苷，例如来自d-木糖，l-阿拉伯糖和l-岩藻糖的那些，是天然产物，寡糖或多糖的组分。这里报道了路易斯酸促进了它们的一些烷基O-和S-糖吡喃糖苷的异构化。SnCl4比TiCl4更成功，在某些情况下后者提供糖基氯的副产物，两者均优于BF3OEt2。使用1H NMR光谱进行的动力学研究显示出反应顺序：O-吡喃吡喃糖苷> O-阿拉伯吡喃吡喃糖苷> O-褐藻糖苷。苯甲酰化的糖苷比乙酰化的糖苷具有更高的反应性。S-糖苷对阿拉伯糖和岩藻糖衍生物的反应性均大于O-糖苷。O-和S-吡喃吡喃糖苷的反应性相似。烟曲喃糖苷的立体选择性最高。