phenyl 2,6-di-O-benzyl-1-thio-β-D-galactopyranoside | 258286-51-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 2,6-di-O-benzyl-1-thio-β-D-galactopyranoside
• 英文别名: (2R,3R,4S,5R,6S)-5-phenylmethoxy-2-(phenylmethoxymethyl)-6-phenylsulfanyloxane-3,4-diol
• CAS: 258286-51-0
• 化学式: C₂₆H₂₈O₅S
• 分子量: 452.571
• InChiKey: QXNBRIJJCCWLMY-CAKRBILKSA-N

物化性质

• 沸点：
  632.3±55.0 °C(Predicted)
• 密度：
  1.28±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  32
• 可旋转键数：
  9
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  93.4
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  phenyl 2,6-di-O-benzyl-1-thio-β-D-galactopyranoside 在 四丁基碘化铵 作用下， 以 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 生成 phenyl 2,3,6-tri-O-benzyl-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  Directing effect by remote electron-withdrawing protecting groups at O-3 or O-4 position of donors in glucosylations and galactosylations

  摘要：

  Glucosylations and galactosylations of various acceptors with donors possessing an electronwithdrawing benzylsulfonyl, benzoyl, or acetyl group at the O-3 or O-4 position were performed. A beta-directing effect by the benzylsulfonyl group at O-3 of the glucosyl donors and by the benzylsulfonyl and acyl groups at O-4 of the glucosyl donors was observed. In contrast, acyl groups at O-3 of the glucosyl donors and acyl groups at O-3 and O-4 of the galactosyl donors exhibited an alpha-directing effect. The alpha-directing effect is partly considered to remote participation of the acyl groups, whereas the beta-directing effect is somewhat attributed to the S(N)2-like reaction of the acceptor with the glycosyl triflate or the contact ion pair, which is stabilized by remote electron-withdrawing groups. Further evidence for the stability of the alpha-glycosyl triflates was determined by a low-temperature NMR study. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2015.06.014
• 作为产物：
  描述：

  phenyl 3,4-O-isopropylidene-1-thio-β-D-galactopyranoside 在 sodium hydride 、 溶剂黄146 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 生成 phenyl 2,6-di-O-benzyl-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  Development of a highly α-selective galactopyranosyl donor based on a rational design

  摘要：

  A galactosyl donor was rationally designed based on protecting group-stereoselectivity study. This donor was prepared and tested in a series of glycosylation reaction. Excellent alpha-selectivity was observed in the test reactions. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2011.08.091

文献信息

• An improved method for the synthesis of protected glycosyl fluorides from thioglycosides using N,N-diethylaminosulfur trifluoride (DAST)
  作者：Katsuhiko Suzuki、Yukishige Ito、Osamu Kanie

  DOI：10.1016/j.carres.2012.07.003

  日期：2012.10

  examined using N,N-diethylaminosulfur trifluoride (DAST). Although the reaction proceeded without N-bromosuccinimide (NBS), in some cases it was found that the electrophilicity of the Vilsmeier-type electrophilic sulfinium cation species was not sufficient for the activation of certain less-reactive thioglycosides. Here, we report the results of fluorination reactions of a series of monosaccharides using

  使用N，N-二乙基氨基三氟化硫（DAST）检查了硫糖苷直接转化为寡糖合成中常用的糖基氟化物。尽管反应在没有N-溴代琥珀酰亚胺（NBS）的情况下进行，但在某些情况下，发现Vilsmeier型亲电electro阳离子物种的亲电性不足以活化某些反应性较低的硫代糖苷。在这里，我们报告了在不存在NBS的情况下使用DAST进行的一系列单糖氟化反应的结果，并讨论了在存在二甲基（甲硫基）s三氟甲烷磺酸盐（DMTST）的情况下加速反应的过程，从而提高了产品收率。
• Synthesis of an Aminooxy Derivative of the GM3 Antigen and Its Application in Oxime Ligation
  作者：Kristopher A. Kleski、Mengchao Shi、Matthew Lohman、Gabrielle T. Hymel、Vinod K. Gattoji、Peter R. Andreana

  DOI：10.1021/acs.joc.0c00320

  日期：2020.12.18

  The anomeric aminooxy GM3 trisaccharide cancer antigen (Neu5Acα2,3Galβ1,4Glcβ-ONH2) has been chemically synthesized using a linear glycosylation approach. The key step involves a highly α(2,3)-stereoselective sialylation to a galactose acceptor. The Neu5Acα2,3Gal intermediate was functionalized as a donor for a [2 + 1] glycosylation, including a glucose acceptor that featured an O-succinimidyl group

  氨氧基GM3三糖癌抗原的异头（Neu5Acα2,3Galβ1,4Glcβ-ONH 2）已经使用线性糖基化的方法化学合成。关键步骤涉及对半乳糖受体的高度α（2,3）-立体选择性唾液酸化。Neu5Acα2,3Gal中间体被功能化为[2 +1]糖基化的供体，其中包括在还原端具有O-琥珀酰亚胺基的氨基葡萄糖作为氨基氧基前体。然后将完全脱保护的异头氨基氧基GM3三糖通过肟连接缀合到免疫相关的两性离子多糖PSA1上。
• Dimethyltin Dichloride Catalyzed Regioselective Alkylation of<i>cis</i>-1,2-Diols at Room Temperature
  作者：Varma Saikam、Saidulu Dara、Mahipal Yadav、Parvinder Pal Singh、Ram A. Vishwakarma

  DOI：10.1021/acs.joc.5b01898

  日期：2015.12.18

  mild and general method for the regioselective installation of benzyl, allyl, para-methoxybenzyl and naphthyl groups on cis-1,2-diols. The optimized method operates at room temperature using dimethyltin dichloride as catalyst and silver oxide as an additive. The present method works well with both sugars (such as mono- and disaccharides) and nonsugars (such as inositols, propan-1,2-diol, 1,2-cycloalkanediols

  在这里，我们已经开发出一种温和的通用方法，用于在顺式-1，2-二醇上区域选择性地安装苄基，烯丙基，对甲氧基苄基和萘基。该优化方法在室温下使用二氯化二甲基锡作为催化剂，氧化银作为添加剂进行操作。本方法对于糖类（例如单糖和二糖）和非糖类（例如肌醇，1，2-丙二醇，1,2-环烷二醇和脱水赤藓糖醇）均适用，并且还提供了相对更好的官能团相容性。
• The synthesis of deoxy-α-Gal epitope derivatives for the evaluation of an anti-α-Gal antibody binding
  作者：Adam J. Janczuk、Wei Zhang、Peter R. Andreana、Joshua Warrick、Peng G. Wang

  DOI：10.1016/s0008-6215(02)00159-3

  日期：2002.8

  alpha-Gal epitopes (also termed as alpha-Gal) are carbohydrate structures bearing the alpha-D-Gal-(1 --> 3)-beta-D-Gal terminus 1 and are known to be the antigen responsible for antibody-mediated hyperacute rejection in xenotransplantation. Terminal 2-, 3-, 4-, and 6-deoxy-Gal derivatives of alpha-Gal were synthesized. Inhibition ELISA using mouse laminin was established to determine the binding affinity of the synthesized alpha-Gal derivatives. 4-Deoxy-alpha-Gal derivative 7 showed a significant reduction in antibody recognition. The IC50 value was 15-fold poorer than the standard alpha-Gal epitopes alpha-D-Gal-(1 --> 3)-beta-D-Gal-(1 --> 4)-beta-D-Glc-NHAc (39) and alpha-D-Gal-(1 --> 3)-beta-D-Gal-(1 -- 4)-beta-D-Glc-OBn (40). A similar observation was seen with 2-deoxy-alpha-Gal derivative 5, whose IC50 value was nearly tenfold higher than the standards. Interestingly, substitution at the terminal 3-position resulted in only a fourfold decrease in antibody recognition, suggesting a possible point of future derivation. Finally, 6-deoxy-alpha-Gal derivative 8 exhibited similar antibody recognition to both alpha-Gal epitope 39 and alpha-Gal epitope 40. This strongly suggests that derivatization at the 6-position can be accomplished without loss of antibody recognition. These findings can be utilized for the future design of other alpha-Gal derivatives. (C) 2002 Elsevier Science Ltd. All rights reserved.
• Synthèse d'oligomères du polysaccharide capsulaire de Salmonella typhi, bactérie à l'origine de la fièvre typhoïde
  作者：Lian Kiow Shi-Shun、Jean-Maurice Mallet、Monique Moreau、Pierre Sinaÿ

  DOI：10.1016/s0040-4020(99)00869-8

  日期：1999.12