pentyl 2,3,4,6-tetra-O-benzyl-β-D-glucopyranoside

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: pentyl 2,3,4,6-tetra-O-benzyl-β-D-glucopyranoside
• 英文别名: (2R,3R,4S,5R,6R)-2-pentoxy-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxane
• 化学式: C₃₉H₄₆O₆
• 分子量: 610.791
• InChiKey: BWEQZFNHLFSVMU-GFRPZHATSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.3
• 重原子数：
  45
• 可旋转键数：
  18
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  55.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  4-戊烯-1-基2,3,4,6-四-O-苄基-D-吡喃葡萄糖苷 在 Wilkinson's catalyst 、 氢气 作用下， 以 乙酸乙酯 为溶剂， 反应 2.0h， 以93%的产率得到pentyl 2,3,4,6-tetra-O-benzyl-β-D-glucopyranoside
  参考文献：
  名称：

  Use of n-Pentenyl Glycosides as Precursors to Various Spacer Functionalities

  摘要：

  Pent-4-enyl beta-D-glucopyranoside and its peracetylated and perbenzylated derivatives are shown to be excellent substrates for preparation of a wide variety of spacer functionalities. The spacer derivatives so obtained are promising substrates for preparing agents such as neo-glycoconjugates, micelles, and liquid crystalline phases, which are of interest for studying various biological and physiological phenomena of carbohydrates.

  DOI：

  10.1021/jo9909554

文献信息

• GaCl3-catalyzed activation of alkynyl glycosides for the synthesis of O-glycosides
  作者：Jhillu S. Yadav、Nagendra N. Yadav、Manoj K. Gupta、Nikhil Srivastava、Basi V. Subba Reddy

  DOI：10.1007/s00706-013-1091-7

  日期：2014.3

  AbstractA catalytic amount of GaCl3 (5 mol%) was found to activate alkynyl glycosides effectively under mild reaction conditions to furnish a variety of O-glycosides in good yields with high β-selectivity. Graphical abstract

  摘要发现在适度的反应条件下催化量的GaCl 3（5mol％）有效地活化炔基糖苷，以高产率和高β选择性提供各种O-糖苷。 图形概要
• An Unexpected FeCl3/C-Catalyzed β-Stereoselective Glycosylation in the Presence of the C(2)-Benzyl Group
  作者：Hong Guo、Wenshuai Si、Juan Li、Guofang Yang、Tianjun Tang、Zhongfu Wang、Jie Tang、Jianbo Zhang

  DOI：10.1055/s-0037-1611801

  日期：2019.8

  described using 2–20 mol% FeCl3/C as the catalyst and benzylated propargyl glycosides as the donors to reach yields up to 96% under mild condition. With an octatomic-ring intermediate at the α-face of FeCl3/C with alkyne of propargyl glycosides, a panel of aglycones comprising aliphatic, alicyclic, unsaturated alcohols, halogenated alcohols, and phenols with different substitution were examined successfully

  抽象的 使用2–20 mol％FeCl 3 / C作为催化剂，苄基炔丙基糖苷作为供体，在温和条件下达到了高达96％的收率，描述了一种不依赖于相邻基团参与的有效且完全β-立体选择性的糖基化反应。在FeCl 3 / Cα面的八原子环中间体与炔丙基糖苷炔基的情况下，成功地检测了一组由脂肪族，脂环族，不饱和醇，卤代醇和具有不同取代基的酚组成的糖苷配基中的排他性β-立体选择性糖基化反应。 使用2–20 mol％FeCl 3 / C作为催化剂，苄基炔丙基糖苷作为供体，在温和条件下达到了高达96％的收率，描述了一种不依赖于相邻基团参与的有效且完全β-立体选择性的糖基化反应。在FeCl 3 / Cα面的八原子环中间体与炔丙基糖苷炔基的情况下，成功地检测了一组由脂肪族，脂环族，不饱和醇，卤代醇和具有不同取代基的酚组成的糖苷配基中的排他性β-立体选择性糖基化反应。
• Chemical Glycosylation with <i>p</i>-Methoxyphenyl (PMP) Glycosides via Oxidative Activation
  作者：Hyun Su Kim、Eunbin Jang、Hoe In Kim、Madala Hari Babu、Jae-Young Lee、Sang Kyum Kim、Jaehoon Sim

  DOI：10.1021/acs.orglett.3c01050

  日期：2023.5.19

  persulfate-mediated oxidative glycosylation system using p-methoxyphenyl (PMP) glycosides as bench-stable glycosyl donors is developed. This study shows that both K2S2O8 as an oxidant and Hf(OTf)4 as a Lewis acid catalyst play important roles in the oxidative activation of the PMP group into a potential leaving group. This convenient glycosylation protocol proceeds under mild conditions and delivers a

  开发了一种新型过硫酸盐介导的氧化糖基化系统，该系统使用对甲氧基苯基 (PMP) 糖苷作为稳定的糖基供体。该研究表明，作为氧化剂的K 2 S 2 O 8和作为路易斯酸催化剂的Hf(OTf) 4在将 PMP 基团氧化活化为潜在离去基团的过程中起着重要作用。这种方便的糖基化方案在温和条件下进行，并提供范围广泛的具有生物学和合成价值的糖缀合物，包括糖基氟化物。
• Stereoselective Organocatalyzed Glycosylation of Glycosyl Trichloroacetimidate Donors: Thiouracil as Brønsted Acid Catalyst
  作者：Ashwani Tiwari、Ariza Khanam、Mohan Lal、Pintu Kumar Mandal

  DOI：10.1002/adsc.202400067

  日期：2024.8.6

  report thiouracil-catalyzed α-selective O-glycosylations employing easily accessible glycosyl trichloroacetimidate donors without using any co-catalyst or additive. A variety of alcohol nucleophiles including saccharides, and amino acids with different protecting groups containing glycosyl trichloroacetimidate donors were successfully α-glycosylated using an operationally simple protocol. Moreover, mechanistic

  在此，我们报道了硫氧嘧啶催化的α-选择性O-糖基化，使用易于获得的糖基三氯乙酰亚胺酯供体，而不使用任何助催化剂或添加剂。使用操作简单的方案成功地将多种醇亲核试剂（包括糖类和具有不同保护基团的含有糖基三氯乙酰亚胺酯供体的氨基酸）进行α-糖基化。此外，机理研究表明硫氧嘧啶在此糖基化过程中起到布朗斯台德酸/碱催化作用。