(2R,3S,4S,5S,6R)-2-Cyclohexyloxy-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol | 152141-30-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2R,3S,4S,5S,6R)-2-Cyclohexyloxy-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol
• 英文别名: (2R,3S,4S,5S,6R)-2-cyclohexyloxy-6-(hydroxymethyl)oxane-3,4,5-triol
• CAS: 152141-30-5
• 化学式: C₁₂H₂₂O₆
• 分子量: 262.303
• InChiKey: PUEQSGBQJWWOQJ-LDMBFOFVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.4
• 重原子数：
  18
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  99.4
• 氢给体数：
  4
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  4-溴苯甲酰氯 、 (2R,3S,4S,5S,6R)-2-Cyclohexyloxy-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol 在 吡啶 作用下， 以196 mg的产率得到cyclohexyl 2,3,4,6-tetra-O-(p-bromobenzoyl)-β-D-mannopyranoside
  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：

  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

文献信息

• Efficient glycosylation of unprotected sugars using sulfamic acid: A mild eco-friendly catalyst
  作者：Goutam Guchhait、Anup Kumar Misra

  DOI：10.1016/j.catcom.2011.07.016

  日期：2011.10

  Sulfamic acid, a mild and environmentally benign catalyst has been successfully used in the Fischer glycosylation of unprotected sugars for the preparation alkyl glycosides. A diverse range of aliphatic alcohols have been used to prepare a series of alkyl glycosides in good to excellent yield. (C) 2011 Elsevier B.V. All rights reserved.
• Glycosylation mediated—BAIL in aqueous solution
  作者：Sébastien Delacroix、Jean-Pierre Bonnet、Matthieu Courty、Denis Postel、Albert Nguyen Van Nhien

  DOI：10.1016/j.carres.2013.08.009

  日期：2013.11

  The use of Bronsted acid ionic liquid (BAIL) as a catalyst for the activation of unreactive and unprotected glycosyl donors has been demonstrated for the first time in aqueous solution. (c) 2013 Elsevier Ltd. All rights reserved.
• Glycosylation Using Unprotected Alkynyl Donors
  作者：Sreeman K. Mamidyala、M.G. Finn

  DOI：10.1021/jo901857x

  日期：2009.11.6

  Gold(III) activation of unprotected propargyl glycosyl donors has been shown to be effective for the synthesis of saccharides. Terminal propargyl glycosides of glucose, galactose, and mannose required heating at reflux in acetonitrile with 5% AuCl(3) for reaction with various primary alcohol acceptors, the latter used in 10-fold molar excess relative to donor. Donors containing the 2-butynyl group were more reactive, giving good yields of glycoside products at lower temperatures Secondary alcohols could also be used but with diminished efficiency. The propargylic family of donors is especially convenient because they can be easily prepared on large scale by Fischer glycosylation and stored indefinitely before chemoselective activation by the catalyst.