tert-butyl 3,4,6-tri-O-benzyl-β-D-glucopyranoside | 219932-13-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tert-butyl 3,4,6-tri-O-benzyl-β-D-glucopyranoside
• 英文别名: t-butyl 3,4,6-tri-O-benzyl-β-D-glucopyranoside；Bn(-3)[Bn(-4)][Bn(-6)]Glc(b)-O-tBu；(2S,3R,4R,5R,6R)-2-[(2-methylpropan-2-yl)oxy]-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-ol
• CAS: 219932-13-5
• 化学式: C₃₁H₃₈O₆
• 分子量: 506.639
• InChiKey: UGYQFPJPNPABEQ-WYQCABFXSA-N

物化性质

• 沸点：
  623.4±55.0 °C(Predicted)
• 密度：
  1.17±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  37
• 可旋转键数：
  12
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.42
• 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：

  tert-butyl 3,4,6-tri-O-benzyl-β-D-glucopyranoside 在 palladium on activated charcoal 吡啶 、 sodium tetrahydroborate 、 氢气 、 乙酸酐 作用下， 以 甲醇 、 乙醇 、 二氯甲烷 、 二甲基亚砜 为溶剂， 生成 tert-butyl 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：

  在 甲醇 、 potassium carbonate 作用下， 以 四氢呋喃 为溶剂， 反应 14.0h， 以24 mg的产率得到tert-butyl 3,4,6-tri-O-benzyl-β-D-glucopyranoside
  参考文献：
  名称：

  β-Glycosidation of Sterically Hindered Alcohols

  摘要：

  The 2-chloro-2-methylpropanoic ester serves as a steering group in the Schmidt glycosidation reaction. Rapid and efficient glycosidation of a range of sterically hindered alcohols takes place under mild, acidic conditions to afford the glycoside products in high yield and beta-selectivity and without formation of orthoester side products. The 2-chloro-2-methylpropanoic ester is readily cleaved under mild, basic conditions.

  DOI：

  10.1021/ol9000735

文献信息

• Simple and mild stereoselective O-glycosidation using 1,2-anhydrosugars under neutral conditions
  作者：Devaraj Somasundaram、Kalpattu K. Balasubramanain、Bhagavathy Shanmugasundaram

  DOI：10.1016/j.tetlet.2019.01.049

  日期：2019.3

  of α-d-1,2-anhydrohexapyranoses with phenols proceeded smoothly in ethyl acetate (neutral conditions) in the absence of metal ion catalysts or additives to stereoselectively furnish 1,2-cis-α-aryl glycosides as the major product and 1,2-trans-β-aryl glycosides as the minor product in good yields. Under similar conditions, this ring opening reaction with alcohols afforded exclusively β-alkyl glycosides

  的开环α - d -1,2- anhydrohexapyranoses与酚在没有金属离子的催化剂或添加剂在乙酸乙酯（中性条件）顺利进行立体选择性配料1,2-顺式- α -芳基糖苷作为主要产物和1,2-反式- β -芳基苷作为良好收益次要产物。在相似的条件下，这种与醇的开环反应以优异的产率仅提供β-烷基糖苷。
• C2-Hydroxyglycosylation with Glycal Donors. Probing the Mechanism of Sulfonium-Mediated Oxygen Transfer to Glycal Enol Ethers
  作者：Eiji Honda、David Y. Gin

  DOI：10.1021/ja025639c

  日期：2002.6.1

  glycal assembly whereby a hydroxyl functionality is stereoselectively installed at the C2-position of a glycal donor with concomitant glycosylation of a nucleophilic acceptor. Mechanistic investigations into this reaction revealed a novel process for sulfonium-mediated oxidation of glycal enol ethers in which the sulfoxide oxygen atom is stereoselectively transferred to the C2-position of the glycal. (18)O-labeling

  使用二芳基亚砜和三氟甲磺酸酐的试剂组合的 C2-羟基糖基化反应提供了一种新的糖基组装方法，其中羟基官能团立体选择性地安装在糖基供体的 C2 位，伴随着亲核受体的糖基化。对该反应的机理研究揭示了一种锍介导的乙二醇烯醇醚氧化的新过程，其中亚砜氧原子立体选择性地转移到乙二醇的 C2 位。(18)O 标记研究表明，S 到 C2 的氧转移过程涉及 C1[键]O 键的初始形成，然后 O 迁移到 C2，导致中间糖基 1,2-作为原位糖基化剂的脱水吡喃糖苷。
• Direct Oxidative Glycosylations with Glycal Donors
  作者：Valeria Di Bussolo、Yong-Jae Kim、David Y. Gin

  DOI：10.1021/ja982112k

  日期：1998.12.1
• β-Glycosidation of Sterically Hindered Alcohols
  作者：Alex M. Szpilman、Erick M. Carreira

  DOI：10.1021/ol9000735

  日期：2009.3.19

  The 2-chloro-2-methylpropanoic ester serves as a steering group in the Schmidt glycosidation reaction. Rapid and efficient glycosidation of a range of sterically hindered alcohols takes place under mild, acidic conditions to afford the glycoside products in high yield and beta-selectivity and without formation of orthoester side products. The 2-chloro-2-methylpropanoic ester is readily cleaved under mild, basic conditions.
• Experimental evidence on the hydroxymethyl group conformation in alkyl β-d-mannopyranosides
  作者：Carlos Mayato、Rosa Dorta、Jesús Vázquez

  DOI：10.1016/j.tetasy.2004.06.019

  日期：2004.8

  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.