4-methylphenyl (β-D-galactopyranosyl)-(1->4)-1-thio-β-D-glucopyranoside | 27894-74-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4-methylphenyl (β-D-galactopyranosyl)-(1->4)-1-thio-β-D-glucopyranoside
• 英文别名: p-Tolyl O-(β-D-galactopyranosyl)-(1->4)-1-thio-β-D-glucopyranoside；p-tolyl β-D-thiolactose；4-methylphenyl 1-thio-β-lactoside；(2S,3R,4S,5R,6R)-2-[(2R,3S,4R,5R,6S)-4,5-dihydroxy-2-(hydroxymethyl)-6-(4-methylphenyl)sulfanyloxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol
• CAS: 27894-74-2
• 化学式: C₁₉H₂₈O₁₀S
• 分子量: 448.491
• InChiKey: QDMSNNVSJGWQSU-QYZNXDDNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.5
• 重原子数：
  30
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.68
• 拓扑面积：
  195
• 氢给体数：
  7
• 氢受体数：
  11

反应信息

• 作为反应物：
  描述：

  苯甲酰氯 、 4-methylphenyl (β-D-galactopyranosyl)-(1->4)-1-thio-β-D-glucopyranoside 在 吡啶 、 4-二甲氨基吡啶 作用下， 反应 5.0h， 生成 p-tolyl 2,3,6-tri-O-benzoyl-4-O-(2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl)-β-D-glucopyranoside
  参考文献：
  名称：

  Programmable One-Pot Oligosaccharide Synthesis

  摘要：

  In an effort to develop a broadly applicable approach to the facile one-pot synthesis of oligosaccharides, the reactivity of a number of p-methylphenyl thioglycoside (STol) donors which are either fully protected or have one hydroxyl group exposed has been quantitatively determined by HPLC. We have characterized and quantified the influence on reactivity of the structural effects of different monosaccharide cores and different protecting groups on each glycoside donor. In addition, we have established a correlation between glycosyl donor reactivity and the chemical shift of the anomeric proton by H-1 NMR. Using the reactivity data, we have created a database of thioglycosides as glycosyl donors and demonstrated its utility in the easy and rapid one-pot assembly of various linear and branched oligosaccharide structures. In addition, we have developed the first computer program, OptiMer, for use as a database search tool and guide for the selection of building blocks for the one-pot assembly of a desired oligosaccharide or a library of individual oligosaccharides.

  DOI：

  10.1021/ja982232s
• 作为产物：
  描述：

  1',2',3',6',2,3,4,6-octa-O-acetyl-β-D-lactose 在 三氟化硼乙醚 、 sodium methylate 作用下， 以 二氯甲烷 为溶剂， 反应 3.0h， 生成 4-methylphenyl (β-D-galactopyranosyl)-(1->4)-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  Choudhury, Ambar Kumar; Ray, Asim Kumar; Roy, Nirmolendu, Journal of Carbohydrate Chemistry, 1995, vol. 14, # 8, p. 1153 - 1164

  摘要：

  DOI：

文献信息

• Low-Concentration 1,2-<i>trans</i>β-Selective Glycosylation Strategy and Its Applications in Oligosaccharide Synthesis
  作者：Chin-Sheng Chao、Chen-Wei Li、Min-Chun Chen、Shih-Sheng Chang、Kwok-Kong Tony Mong

  DOI：10.1002/chem.200901119

  日期：2009.10.19

  This study develops an operationally easy, efficient, and general 1,2‐trans β‐selective glycosylation reaction that proceeds in the absence of a C2 acyl function. This process employs chemically stable thioglycosyl donors and low substrate concentrations to achieve excellent β‐selectivities in glycosylation reactions. This method is widely applicable to a range of glycosyl substrates irrespective of

  这项研究开发了一种易于操作，有效且通用的1,2-反式β-选择性糖基化反应，该反应在没有C2酰基功能的情况下进行。该过程采用化学上稳定的硫糖基供体和低底物浓度，以在糖基化反应中实现出色的β选择性。该方法可广泛应用于各种糖基底物，无论其结构和羟基保护功能如何。碳水化合物化学中这种低浓度的1,2-反式β-选择性糖基化消除了使用高反应性硫糖苷构建1,2-反式的限制β糖苷键。这有利于寡糖合成新策略的设计，如生物学相关的β-（1→6）-葡聚糖三糖，β-连接的Gb 3和isoGb 3衍生物的制备所示。
• MW-assisted Er(OTf)3-catalyzed mild cleavage of isopropylidene acetals in Tricky substrates
  作者：Antonio Procopio、Marco Gaspari、Monica Nardi、Manuela Oliverio、Roberto Romeo

  DOI：10.1016/j.tetlet.2008.01.089

  日期：2008.3

  Erbium(III) trifluoromethane sulfonate is proposed as a very gentle Lewis acid catalyst in a MW-assisted chemoselective method for the cleavage of isopropylidene acetals in awkward substrates by using pure water as the solvent.

  提出了一种三氟甲烷磺酸is（III），它是一种MW辅助化学选择方法中非常温和的路易斯酸催化剂，用于通过使用纯水作为溶剂裂解难处理的底物中的异亚丙基缩醛。
• Borinic Acid Catalyzed Stereo- and Regioselective Couplings of Glycosyl Methanesulfonates
  作者：Kyan A. D’Angelo、Mark S. Taylor

  DOI：10.1021/jacs.6b06943

  日期：2016.8.31

  catalyst, room temperature). The borinic acid catalyst not only influences site-selectivity via activation of 1,2- or 1,3-diol motifs, but also has a pronounced effect on the stereochemical outcome: 1,2-trans-linked disaccharides are obtained selectively in the absence of neighboring group participation. Reaction progress kinetic analysis was used to obtain insight into the mechanism of glycosylation, both

  在二芳基硼酸催化剂存在下，糖基甲磺酸盐与部分保护的吡喃糖苷和呋喃糖苷受体进行区域和立体选择性偶联。甲磺酸酯供体由糖基半缩醛原位制备，并在温和、操作简单的条件下（胺碱、有机硼催化剂、室温）偶联。硼酸催化剂不仅通过 1,2- 或 1,3- 二醇基序的活化影响位点选择性，而且对立体化学结果有显着影响：在不存在的情况下选择性地获得 1,2-反式连接的二糖邻组参与。反应进程动力学分析用于深入了解糖基化机制，在催化剂存在和不存在的情况下，而甲磺酸酯异头物的相互转化率则由核磁共振交换光谱法 (EXSY) 确定。总之，结果表明，尽管未催化和催化反应产生相反的立体化学结果，但两者都通过缔合机制进行。
• Facile Synthesis of Tumor-Associated Carbohydrate Antigen Ganglioside GM₃from Sialic Acid, Lactose, and Serine
  作者：Guo-wen Xing、Li Chen、Fen-fen Liang

  DOI：10.1002/ejoc.200900778

  日期：2009.12

  Ganglioside GM3 [α-Neu5Ac-(2,3)-β-Gal-(1,4)-β-Glc-(1,1)-Cer; 1] is considered as an important tumor-associated carbohydrate antigen, which can be used in the development of tumor vaccine. In this study, a facile and convergent synthetic strategy for GM3 was developed, and the preparation of three building blocks started from the most readily available compounds sialic acid, lactose, and L-serine. Ceramide

  神经节苷脂 GM3 [α-Neu5Ac-(2,3)-β-Gal-(1,4)-β-Glc-(1,1)-Cer; 1] 被认为是一种重要的肿瘤相关糖类抗原，可用于肿瘤疫苗的开发。在这项研究中，开发了一种简便且收敛的 GM3 合成策略，并从最容易获得的化合物唾液酸、乳糖和 L-丝氨酸开始制备三个构建块。神经酰胺苷元 9 由 L-丝氨酸分 13 步构建，总产率为 6%，而乳糖基三氯乙酰亚胺酯 14 由乳糖分 7 步合成，产率为 25%。以我组开发的新型N-乙酰-5-N,4-O-恶唑烷酮保护的对甲苯硫代唾液酸15为供体，苯甲酰基保护的乳糖神经酰胺二醇23的唾液酸化反应以54%的收率成功完成。我们的策略在五个步骤中提供了更短的 GM3 线性全合成，总产率为 26%。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
• Tandem One-Pot Acetalation-Acetylation for Direct Access to Differentially Protected Thioglycosides and O-Glycosides with p-Toluenesulfonic Acid
  作者：Kwok-Kong Mong、Chin-Sheng Chao、Min-Chun Chen、Chun-Wei Lin

  DOI：10.1055/s-0028-1087913

  日期：2009.3

  A new tandem one-pot acetalation-acetylation procedure is reported which streamlines routine protecting-group manipulation of carbohydrate molecules in production of differentially protected O- and thioglycosides. This new procedure eliminates the use of highly toxic pyridine, and p-toluenesulfonic acid is employed as catalyst for acetalation and acetylation. Synthetic utility of the new procedure is demonstrated in the expeditious preparation of differentially protected glycosides from a wide variety of carbohydrate substrates including unprotected O-glycosides, thioglycosides, and N-acetyl neuraminic acid ester.

  报道了一种新的串联一锅缩醛化-乙酰化程序，该程序简化了在生产差异保护的 O- 和硫代糖苷时碳水化合物分子的常规保护基操作。这种新工艺消除了剧毒吡啶的使用，并采用对甲苯磺酸作为缩醛化和乙酰化的催化剂。新方法的合成效用在从多种碳水化合物底物（包括未保护的 O-糖苷、硫代糖苷和 N-乙酰神经氨酸酯）快速制备差异保护糖苷方面得到了证明。