cyclohexyl 3,4,6-tri-O-benzyl-β-D-mannopyranoside | 244282-24-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: cyclohexyl 3,4,6-tri-O-benzyl-β-D-mannopyranoside
• 英文别名: (2R,3S,4R,5R,6R)-2-cyclohexyloxy-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-ol
• CAS: 244282-24-4
• 化学式: C₃₃H₄₀O₆
• 分子量: 532.677
• InChiKey: CNLWUDZFXACMQR-CVCQUZQZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.3
• 重原子数：
  39
• 可旋转键数：
  12
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  66.4
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  cyclohexyl 3,4,6-tri-O-benzyl-β-D-mannopyranoside 在 palladium on activated charcoal 氢气 作用下， 以 乙醇 为溶剂， 生成 (2R,3S,4S,5S,6R)-2-Cyclohexyloxy-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol
  参考文献：
  名称：

  Experimental evidence on the hydroxymethyl group conformation in alkyl β-d-mannopyranosides

  摘要：

  A rotational population Study of the hydroxymethyl group of alkyl beta-D-mannopyranosides was performed by means of CD and NMR spectroscopy. Three different benzyl, acetyl, and p-bromobenzoyl series of alkyl beta-D-mannopyranosides with different chiral and nonchiral aglycons were synthesized and analyzed. Different rotational populations were observed for each series by changing the structure of the aglycon. The results showed a clear correlation between the rotational population of the hydroxymethyl group around the C5-C6 bond and the pK(a) of the bonded alcohol (aglycon). The population of the gt rotamer gradually increased as the pK(a) increased while that of the gg rotamer decreased and the population of the tg rotamer remained almost constant. This is explained by the exo-anomeric effect. For chiral alkyl derivatives, the results also showed a close dependence on the absolute configuration of the aglycon. Comparison of rotational population anomers revealed the dependence or the hydroxymethyl group on the anomeric configuration and a greater dependence on the aglycon structure in the beta anomers. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.06.019
• 作为产物：
  描述：

  phenyl 2-O-acetyl-3,4,6-tri-O-benzyl-1-thio-α-D-mannopyranoside 在 吡啶 、 N-碘代丁二酰亚胺 、 2,6-二叔丁基-4-甲基吡啶 、 4 A molecular sieve 作用下， 以 四氢呋喃 、 二氯甲烷 、 甲苯 为溶剂， 反应 38.0h， 生成 cyclohexyl 3,4,6-tri-O-benzyl-β-D-mannopyranoside
  参考文献：
  名称：

  N-碘代琥珀酰亚胺介导的分子内糖苷配基传递

  摘要：

  烯醇醚可以通过2- O乙酸酯或对-甲氧基苯甲酸酯的Tebbe甲基化来获得。然后可以使用N-碘代琥珀酰亚胺来实现束缚和硫糖苷活化两者，从而允许以一或两个步骤的方式立体选择性地合成α-葡糖苷和β-甘露糖苷。

  DOI：

  10.1016/s0040-4020(01)00308-8

文献信息

• Stereoselective 1,2-cis Glycosylation of 2-O-Allyl Protected Thioglycosides
  作者：Mahmoud Aloui、David J. Chambers、Ian Cumpstey、Antony J. Fairbanks、Alison J. Redgrave、Christopher M. P. Seward

  DOI：10.1002/1521-3765(20020603)8:11<2608::aid-chem2608>3.0.co;2-4

  日期：2002.6.3

  intramolecular aglycon delivery (IAD), whereby a glycosyl acceptor is temporarily appended to a hydroxyl group of a glycosyl donor is an attractive method that can allow the synthesis of 1,2-cis glycosides in an entirely stereoselective fashion. 2-O-Allyl protected thioglycoside donors are excellent substrates for IAD, and may be glycosylated stereoselectively through a three-step reaction sequence. This sequence

  分子内糖苷配基递送（IAD）技术，其中将糖基受体暂时附加到糖基供体的羟基上，是一种有吸引力的方法，它可以以完全立体选择性的方式合成1,2-顺式糖苷。2-O-烯丙基保护的硫代糖苷供体是IAD的优异底物，可通过三步反应序列进行立体选择性糖基化。该序列由定量产生的烯丙基键异构化组成，以产生乙烯基醚，该乙烯基醚随后可以进行所需的糖基受体的N-碘代琥珀酰亚胺介导的束缚，以及随后的分子内糖基化，从而相应地产生α-葡糖苷或β-甘露糖苷。尽管一锅连接和糖基化的尝试因与过量糖基受体之间的竞争性分子间反应而受阻，这个问题可以通过使用过量的糖基供体简单地克服。烯丙基介导的IAD是其他IAD合成β-甘露糖苷的方法的一种广泛适用的实用替代方法，该方法同样适用于α-葡萄糖键。就施用的简便性和产率而言，这是有利的，此外，不需要糖基供体的环状4，6-保护。
• Stereoselective cis glycosylation of 2-O-allyl protected glycosyl donors by intramolecular aglycon delivery (IAD)
  作者：Christopher M. P. Seward、Ian Cumpstey、Mahmoud Aloui、Seth C. Ennis、Antony J. Fairbanks、Alison J. Redgrave

  DOI：10.1039/b004522p

  日期：——

  2-O-Allyl protected glycosyl donors may be glycosylated stereoselectively via a three step sequence involving double bond isomerization, N-iodosuccinimide mediated tethering to a glycosyl acceptor and subsequent intramolecular glycosylation (intramolecular aglycon delivery, IAD).

  2-O-烯丙基保护的糖基供体可以通过涉及双键异构化、N-碘代琥珀酰亚胺介导的与糖基受体的束缚和随后的分子内糖基化（分子内苷元递送，IAD）的三步序列进行立体选择性糖基化。
• Stereospecific Synthesis of 1,2-<i>cis</i> Glycosides by Allyl-Mediated Intramolecular Aglycon Delivery. 2. The Use of Glycosyl Fluorides
  作者：Ian Cumpstey、Antony J. Fairbanks、Alison J. Redgrave

  DOI：10.1021/ol016175a

  日期：2001.7.1

  [reaction: see text] Stereospecific 1,2-cis glycosylation of 2-O-allyl-protected glucosyl and mannosyl fluorides via a sequence of allyl isomerization, N-iodosuccinimide-mediated tethering, and intramolecular aglycon delivery (IAD) is reported. The use of fluoride as anomeric leaving group is advantageous in that tethering efficiencies can be increased for hindered aglycon alcohols by the use of extended reaction

  [反应：见正文]据报道，通过烯丙基异构化，N-碘代琥珀酰亚胺介导的束缚和分子内糖苷配基递送（IAD）的序列，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。使用氟化物作为端基异构离去基团是有利的，因为通过使用延长的反应时间而没有竞争性端基异构活化，可以提高对受阻糖苷醇的束缚效率。分子内糖基化以完全立体选择性的方式提供所需的α-葡萄糖苷和β-甘露糖苷。
• 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。
• Ennis, Synlett, 1999, # 9, p. 1387 - 1390
  作者：Ennis

  DOI：——

  日期：——