2-O-prop-1'-enyl-3,4,6-tri-O-benzyl-α-D-mannopyranosyl fluoride | 358351-64-1

• 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-O-prop-1'-enyl-3,4,6-tri-O-benzyl-α-D-mannopyranosyl fluoride
• CAS: 358351-64-1
• 化学式: C₃₀H₃₃FO₅
• 分子量: 492.587
• InChiKey: GPFSXHVELLEZRR-ZNOUKXQUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.99
• 重原子数：
  36.0
• 可旋转键数：
  12.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  46.15
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  2-O-prop-1'-enyl-3,4,6-tri-O-benzyl-α-D-mannopyranosyl fluoride 在 4 A molecular sieve 2,6-二叔丁基-4-甲基吡啶 、 碘 、 silver trifluoromethanesulfonate 、 tin(ll) chloride 作用下， 以 二氯甲烷 、 1,2-二氯乙烷 为溶剂， 反应 7.5h， 生成 para-methoxyphenyl 3,4,6-tri-O-benzyl-β-D-mannopyranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside
  参考文献：
  名称：

  Allyl protecting group mediated intramolecular aglycon delivery: optimisation of mixed acetal formation and mechanistic investigation

  摘要：

  An efficient protocol for the formation of alpha-iodo mixed acetals, the first step of allyl-mediated 1AD, by reaction of allyl-derived enol ethers and alcohols, using I-2, AgOTf and di-tert-butyl methylpyridine as a novel source of I+, is reported. This reagent combination is capable of tethering glycosyl donors to the secondary alcohol groups of a variety of glycosyl acceptors including mono-, di- and trisaccharides. Mechanistic studies confirm the intramolecular nature of the glycosylation reaction, whilst the attempted use of diol glycosyl acceptors reveals limitations of both regio- and stereo selectivity in the glycosylation step. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.09.003

文献信息

• Allyl Protecting Group Mediated Intramolecular Aglycon Delivery (IAD) of Glycosyl Fluorides
  作者：Ian Cumpstey、Antony J. Fairbanks、Alison J. Redgrave

  DOI：10.1007/s007060200020

  日期：2002.4.1

  sequence of allyl isomerization, N-iodosuccinimide mediated tethering, and intramolecular aglycon delivery (IAD). Fluoride is advantageous as an anomeric leaving group since extended reaction times can be employed to tether hindered aglycon alcohols without competitive anomeric activation. Tin(II) chloride mediated intramolecular glycosylation furnishes the desired α-glucosides and β-mannosides in an

  2-O-烯丙基保护的葡萄糖基和甘露糖基氟化物的 立体特异性1,2- 顺式 糖基化可以 通过 一系列烯丙基异构化，N-碘代琥珀酰亚胺介导的束缚和分子内糖苷配基递送（IAD）实现。氟化物作为异头离去基团是有利的，因为延长的反应时间可用于束缚受阻的糖苷配基醇而没有竞争性的异头活化。氯化锡（II）介导的分子内糖基化反应以完全立体选择性的方式提供了所需的α-葡萄糖苷和β-甘露糖苷。