phenyl 4,6-di-O-benzyl-2,3-di-O-(2,3-dimethoxybutane-2,3-diyl)-1-thio-β-D-glucopyranoside | 864966-91-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 4,6-di-O-benzyl-2,3-di-O-(2,3-dimethoxybutane-2,3-diyl)-1-thio-β-D-glucopyranoside
• 英文别名: phenyl 4,6-di-O-benzyl-2,3-O-(2′,3′-dimethoxybutane-2′,3′-diyl)-1-thio-β-D-glucopyranoside；(2R,3R,4aR,5S,7R,8R,8aS)-2,3-dimethoxy-2,3-dimethyl-8-phenylmethoxy-7-(phenylmethoxymethyl)-5-phenylsulfanyl-5,7,8,8a-tetrahydro-4aH-pyrano[3,4-b][1,4]dioxine
• CAS: 864966-91-6
• 化学式: C₃₂H₃₈O₇S
• 分子量: 566.716
• InChiKey: OYVYGPLPOFQYAP-RLXJNZNTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.1
• 重原子数：
  40
• 可旋转键数：
  11
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  89.9
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  phenyl 4,6-di-O-benzyl-2,3-di-O-(2,3-dimethoxybutane-2,3-diyl)-1-thio-β-D-glucopyranoside 在 三乙胺 、 三氟乙酸 作用下， 以 二氯甲烷 、 甲苯 为溶剂， 反应 4.0h， 生成 phenyl 4,6-di-O-benzyl-2,3-O-carbonyl-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  Stereocontrolled Formation of β-Glucosides and Related Linkages in the Absence of Neighboring Group Participation:  Influence of a trans-Fused 2,3-O-Carbonate Group

  摘要：

  [GRAPHICS]Phenyl 4,6-di-O-benzyl-2,3-O-carbonyl-beta-D-glucothiopyranoside and the regiosiomeric phenyl 2,6-di-O-benzyl-3,4-O-carbonyl-beta-D-glucothiopyranoside were prepared and studied as glucosyl donors at -60 degrees C in dichloromethane with preactivation by 1-benzenesulfinyl piperidine before addition of the acceptor alcohol. The 2,3-O-carbonate protected donor showed moderate to excellent beta-selectivity under these conditions depending on the acceptor employed, thereby providing a means for 1,2-trans-equatorial glycosidic bonds without recourse to neighboring group participation and its associated problem of ortho ester formation. In contrast, the 3,4-O-carbonate protected donor showed moderate to no beta-selectivity under the conditions employed. The results obtained in this study with carbonate protected glucopyranosyl donors are contrasted with those obtained previously in the manno- and rhamnopyranosyl series when the 2,3-O-carbonate protected is (x-selective and the 3,4-O-carbonate is beta-selective.

  DOI：

  10.1021/jo0508999
• 作为产物：
  描述：

  1-硫代-b-D-吡喃葡萄糖苷对甲苯酯 在 camphor-10-sulfonic acid 、 sodium hydride 、 原甲酸三甲酯 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 24.17h， 生成 phenyl 4,6-di-O-benzyl-2,3-di-O-(2,3-dimethoxybutane-2,3-diyl)-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  Stereocontrolled Formation of β-Glucosides and Related Linkages in the Absence of Neighboring Group Participation:  Influence of a trans-Fused 2,3-O-Carbonate Group

  摘要：

  [GRAPHICS]Phenyl 4,6-di-O-benzyl-2,3-O-carbonyl-beta-D-glucothiopyranoside and the regiosiomeric phenyl 2,6-di-O-benzyl-3,4-O-carbonyl-beta-D-glucothiopyranoside were prepared and studied as glucosyl donors at -60 degrees C in dichloromethane with preactivation by 1-benzenesulfinyl piperidine before addition of the acceptor alcohol. The 2,3-O-carbonate protected donor showed moderate to excellent beta-selectivity under these conditions depending on the acceptor employed, thereby providing a means for 1,2-trans-equatorial glycosidic bonds without recourse to neighboring group participation and its associated problem of ortho ester formation. In contrast, the 3,4-O-carbonate protected donor showed moderate to no beta-selectivity under the conditions employed. The results obtained in this study with carbonate protected glucopyranosyl donors are contrasted with those obtained previously in the manno- and rhamnopyranosyl series when the 2,3-O-carbonate protected is (x-selective and the 3,4-O-carbonate is beta-selective.

  DOI：

  10.1021/jo0508999

文献信息

• A 1,2-<i>trans</i> -Selective Glycosyl Donor Bearing Cyclic Protection at the C-2 and C-3 Hydroxy Groups
  作者：Nahoko Yagami、Hideki Tamai、Taro Udagawa、Akiharu Ueki、Miku Konishi、Akihiro Imamura、Hideharu Ishida、Makoto Kiso、Hiromune Ando

  DOI：10.1002/ejoc.201700671

  日期：2017.9.1

  A new 1,2-trans-selective glycosylation reaction is described. Glucosyl donors protected cyclically at the C-2 and C-3 hydroxy groups as six- (butane diacetal), seven- (tetraisopropyldisiloxanylidene), or eight- (2,3-o-xylylene) membered fused rings were synthesized in a straightforward manner. The glycosylation reactions of the glucosyl donors with various acceptors mainly generated β-glycosides under

  描述了一种新的 1,2-反式选择性糖基化反应。葡萄糖基供体在 C-2 和 C-3 羟基上被循环保护为六（丁烷二缩醛）、七（四异丙基二亚硅氧烷）或八（2,3-o-亚二甲苯基）元稠环，以直接方式合成. 在常规反应条件下，葡萄糖基供体与各种受体的糖基化反应主要生成β-糖苷。结果表明，从立体选择性和化学稳定性的角度来看，邻二甲苯基是合适的1,2-反式导向基团。通过核磁共振光谱和计算模拟对邻二甲苯保护的葡萄糖衍生物的氧代碳鎓离子进行了构象研究。结果表明氧碳鎓离子主要采用 4H3 构象，这是由于 C-2 和 C-3 处的刚性互稠环，而非环状保护的衍生物可能在构象之间波动。这些结果表明，C-2 处的伪赤道木氧基与传入的亲核试剂之间的相互作用阻碍了 1,2-顺式攻击。
• β-Selective glucosylation in the absence of neighboring group participation: influence of the 3,4-O-bisacetal protecting system
  作者：David Crich、Venkataraman Subramanian、Thomas K. Hutton

  DOI：10.1016/j.tet.2007.03.128

  日期：2007.6

  A 3,4-O-bisacetal 2,6-di-O-benzyl protected thioglucoside is converted to the corresponding glucosyl triflate with 1-benzenesulfinyl piperidine and trifluoromethanesulfonic anhydride. The moderate to excellent beta-selectivity exhibited with this glucosyl triflate with a range of alcohols is generally higher than that observed with the more electronically disarmed corresponding 3,4-O-carbonate, for which a possible reason is advanced. (c) 2007 Elsevier Ltd. All rights reserved.
• Stereocontrolled Formation of β-Glucosides and Related Linkages in the Absence of Neighboring Group Participation:  Influence of a <i>trans</i>-Fused 2,3-<i>O</i>-Carbonate Group
  作者：David Crich、Prasanna Jayalath

  DOI：10.1021/jo0508999

  日期：2005.9.1

  [GRAPHICS]Phenyl 4,6-di-O-benzyl-2,3-O-carbonyl-beta-D-glucothiopyranoside and the regiosiomeric phenyl 2,6-di-O-benzyl-3,4-O-carbonyl-beta-D-glucothiopyranoside were prepared and studied as glucosyl donors at -60 degrees C in dichloromethane with preactivation by 1-benzenesulfinyl piperidine before addition of the acceptor alcohol. The 2,3-O-carbonate protected donor showed moderate to excellent beta-selectivity under these conditions depending on the acceptor employed, thereby providing a means for 1,2-trans-equatorial glycosidic bonds without recourse to neighboring group participation and its associated problem of ortho ester formation. In contrast, the 3,4-O-carbonate protected donor showed moderate to no beta-selectivity under the conditions employed. The results obtained in this study with carbonate protected glucopyranosyl donors are contrasted with those obtained previously in the manno- and rhamnopyranosyl series when the 2,3-O-carbonate protected is (x-selective and the 3,4-O-carbonate is beta-selective.