methyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-D-glucopyranosyl)-α-D-glucopyranoside

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: methyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-D-glucopyranosyl)-α-D-glucopyranoside
• 英文别名: methyl 6-O-(2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；methyl 2,3,4-tri-O-benzyl-6-O-(2',3',4',6'-tetra-O-benzoyl-β-D-glucopyranosyl)-α-D-glucopyranoside；methyl (2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-(1->6)-2,3,4-tri-O-benzyl-α-D-glucopyranoside；Bz(-2)[Bz(-3)][Bz(-4)][Bz(-6)]Glc(b1-6)[Bn(-2)][Bn(-3)][Bn(-4)]a-Glc1Me；[(2R,3R,4S,5R,6R)-3,4,5-tribenzoyloxy-6-[[(2R,3R,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]methoxy]oxan-2-yl]methyl benzoate
• 化学式: C₆₂H₅₈O₁₅
• 分子量: 1043.13
• InChiKey: KGGQKUPKURALRO-WKJHAHBPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10.3
• 重原子数：
  77
• 可旋转键数：
  26
• 环数：
  9.0
• sp3杂化的碳原子比例：
  0.26
• 拓扑面积：
  170
• 氢给体数：
  0
• 氢受体数：
  15

反应信息

• 作为产物：
  描述：

  (2R,3R,4S,5R,6S)-2-(acetoxymethyl)-6-(phenylthio)tetrahydro-2H-pyran-3,4,5-triyl triacetate 在 吡啶 、 甲醇 、 lithium tetrafluoroborate 、 3 A molecular sieve 、 sodium methylate 作用下， 以 乙腈 为溶剂， 反应 15.0h， 生成 methyl 2,3,4-tri-O-benzoyl-6-O-(2,3,4,6-tetra-O-benzoyl-D-glucopyranosyl)-α-D-glucopyranoside
  参考文献：
  名称：

  由苯基或乙基1-硫代糖苷电合成二糖

  摘要：

  糖基供体苯基和乙基2,3,4,6-四-O-苄基-1-硫代-β-D-吡喃葡萄糖苷在干燥的乙腈中在各种伯和仲糖醇的存在下进行恒流电解未分裂的细胞，以良好的产率选择性地产生了β-连接的二糖衍生物。苯基2,3,4,6-四-O-苯甲酰基-1-硫代-β-D-吡喃葡萄糖苷以良好至中等的产率专门提供了β-葡萄糖苷。

  DOI：

  10.1016/0008-6215(83)85004-6

文献信息

• Gold(I)-Catalyzed Glycosylation with Glycosyl Ynenoates as Donors
  作者：Xiaona Li、Chenyu Li、Rongkun Liu、Jiazhe Wang、Zixuan Wang、Yan Chen、You Yang

  DOI：10.1021/acs.orglett.9b03851

  日期：2019.12.6

  A simple and versatile glycosylation method with both armed and disarmed glycosyl ynenoates as donors is developed. Employing a gold(I) complex as catalyst with or without the assistance of TfOH, the scope of the present glycosylation protocol is very wide. The utility of the present ynenoate donors is demonstrated in the efficient synthesis of oligosaccharides via the latent-active strategy and the

  开发了一种简单且通用的糖基化方法，其中武装和解除武装的糖基炔诺酸酯都作为供体。在有或没有TfOH的辅助下采用金（I）配合物作为催化剂，本糖基化方案的范围非常宽。通过潜在的活性策略和多重正交一锅策略在低聚糖的有效合成中证明了本发明的炔酸供体的实用性。最后，该方法能够正式合成肺炎链球菌血清型3的四糖半抗原和32mer聚甘露糖苷的高度收敛合成。
• <i>O</i>-Glycosylation Enabled by <i>N-</i>(Glycosyloxy)acetamides
  作者：Miao Liu、Bo-Han Li、De-Cai Xiong、Xin-Shan Ye

  DOI：10.1021/acs.joc.8b01003

  日期：2018.8.3

  A novel glycosylation protocol has been established by using N-(glycosyloxy)acetamides as glycosyl donors. The N-oxyacetamide leaving group in donors could be rapidly activated in the presence of Cu(OTf)2 or SnCl4 under microwave irradiation. This glycosylation process afforded the coupled products in high yields, and the reaction enjoyed a broad substrate scope, even for disarmed donors and hindered

  通过使用N-（糖基氧基）乙酰胺作为糖基供体已经建立了新的糖基化方案。在微波辐射下，存在Cu（OTf）2或SnCl 4的情况下，供体中的N-氧乙酰胺离去基团可以快速活化。该糖基化过程以高收率提供了偶联产物，并且该反应享有广泛的底物范围，即使对于缴械的供体和受阻的受体也是如此。供体的容易获得，N-（糖基氧基）乙酰胺的高稳定性以及小的离去基团使该方法非常实用。
• Palladium(<scp>ii</scp>)-assisted activation of thioglycosides
  作者：Samira Escopy、Yashapal Singh、Alexei V. Demchenko

  DOI：10.1039/d1ob00004g

  日期：——

  Described herein is the first example of glycosidation of thioglycosides in the presence of palladium(II) bromide. While the activation with PdBr2 alone was proven feasible, higher yields and cleaner reactions were achieved when these glycosylations were performed in the presence of propargyl bromide as an additive. Preliminary mechanistic studies suggest that propargyl bromide assists the reaction

  本文描述的是在溴化钯( II )存在下硫代糖苷的糖苷化的第一个实例。虽然单独使用 PdBr 2进行活化已被证明是可行的，但当这些糖基化在炔丙基溴作为添加剂存在的情况下进行时，可以实现更高的产率和更清洁的反应。初步机理研究表明，炔丙基溴通过产生电离络合物来促进反应，从而加速离去基团的离开。研究了与不同糖基受体反应的各种硫代糖苷供体，以确定这种新反应的初始范围。还探索了硫代糖苷相对于其他离去基团的选择性和化学选择性激活。
• Visible-light-promoted 3,5-dimethoxyphenyl glycoside activation and glycosylation
  作者：Yafei Cao、Minmin Zhou、Run-Ze Mao、You Zou、Feng Xia、Da-Ke Liu、Jianhui Liu、Qin Li、De-Cai Xiong、Xin-Shan Ye

  DOI：10.1039/d1cc04473g

  日期：——

  A new glycosylation method promoted by visible light with 3,5-dimethoxyphenyl glycoside as the donor was developed.

  一种以3,5-二甲氧基苯基糖苷为供体的可见光促进糖基化方法被开发出来。

• Acid-Catalyzed <i>O</i>-Glycosylation with Stable Thioglycoside Donors
  作者：Kristina D. Lacey、Rashanique D. Quarels、Shaofu Du、Ashley Fulton、Nicholas J. Reid、Austin Firesheets、Justin R. Ragains

  DOI：10.1021/acs.orglett.8b02125

  日期：2018.9.7

  4-(4-methoxyphenyl)-4-pentenylthioglycosides (MPTGs), undergo acid-catalyzed O-glycosylations with a range of sugar and nonsugar alcohols at 25 °C. Electron density at the styrene alkene is critical for reactivity while sugar protecting group patterns have a minimal effect. In contrast with most methods for thioglycoside activation, acid-catalyzed activation of MBTGs is compatible with electroneutral alkenes

  两类硫代糖苷（4-（4-甲氧基苯基）-3-丁烯基硫代糖苷（MBTG）和4-（4-甲氧基苯基）-4-戊烯基硫代糖苷（MPTG））经过酸催化的O-糖基化反应，并带有一系列糖和非糖醇在25°C下。苯乙烯烯烃上的电子密度对于反应性至关重要，而糖保护基的作用则微乎其微。与大多数硫糖苷活化方法相反，MBTG的酸催化活化与电子中性烯烃相容。