phenyl 2,3-di-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside | 144830-21-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 2,3-di-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside
• 英文别名: phenyl 2,3-di-O-benzyl-4,6-di-O-benzylidene-1-thio-β-D-galactopyranoside；(4aR,6S,7R,8S,8aS)-2-phenyl-7,8-bis(phenylmethoxy)-6-phenylsulfanyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine
• CAS: 144830-21-7
• 化学式: C₃₃H₃₂O₅S
• 分子量: 540.68
• InChiKey: KDTRYCJSIFGZHI-SWKQPETJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.3
• 重原子数：
  39
• 可旋转键数：
  9
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  71.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  phenyl 2,3-di-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside 在 盐酸 、 4-二甲氨基吡啶 、 三氟甲磺酸三甲基硅酯 、 camphor-10-sulfonic acid 、 sodium methylate 、 三乙胺 作用下， 以 甲醇 、 二氯甲烷 、 丙酮 为溶剂， 反应 6.0h， 生成 3,4-O-isopropylidene-6-O-(1-methoxy-1-methylethyl)-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  Mechanistic Studies and Methods To Prevent Aglycon Transfer of Thioglycosides

  摘要：

  Thioglycosides have been employed extensively for the synthesis of complex oligosaccharides, carbohydrate libraries, and mimetics of O-glycosides. While very useful, aglycon transfer is a problematic side reaction with thioglycosides. In this paper, a series of mechanistic studies are described. The aglycon transfer process is shown to affect both armed and disarmed thioglycosides, cause anomerization of the carbon-sulfur bond of a thioglycoside, and destroy the product of a glycosylation reaction. The results indicate that the aglycon transfer process can be a major problem for a wide range of thioglycosides. This side reaction is especially important to consider when carrying out complex reactions such as solid-phase glycosylations, one-pot or orthogonal multicomponent glycosylations, and construction of carbohydrate libraries. To prevent transfer, a number of modified aglycons were examined. The 2,6-dimethylphenyl ( DMP) aglycon was found to effectively block transfer in a variety of model studies and glycosylation reactions. The DMP group can be installed in one step from a commercially available thiol ( 2,6-dimethylthiophenol) and is useable as a glycosyl donor. On the basis of these features, the DMP group is proposed as a convenient and improved aglycon for thioglycosides.

  DOI：

  10.1021/ja063247q
• 作为产物：
  描述：

  2,3,4,6-O-四乙酰基-1-硫代-β-D-苯基半乳糖苷 在 camphor-10-sulfonic acid 、 sodium methylate 、 sodium hydride 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 6.0h， 生成 phenyl 2,3-di-O-benzyl-4,6-O-benzylidene-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  Mechanistic Studies and Methods To Prevent Aglycon Transfer of Thioglycosides

  摘要：

  Thioglycosides have been employed extensively for the synthesis of complex oligosaccharides, carbohydrate libraries, and mimetics of O-glycosides. While very useful, aglycon transfer is a problematic side reaction with thioglycosides. In this paper, a series of mechanistic studies are described. The aglycon transfer process is shown to affect both armed and disarmed thioglycosides, cause anomerization of the carbon-sulfur bond of a thioglycoside, and destroy the product of a glycosylation reaction. The results indicate that the aglycon transfer process can be a major problem for a wide range of thioglycosides. This side reaction is especially important to consider when carrying out complex reactions such as solid-phase glycosylations, one-pot or orthogonal multicomponent glycosylations, and construction of carbohydrate libraries. To prevent transfer, a number of modified aglycons were examined. The 2,6-dimethylphenyl ( DMP) aglycon was found to effectively block transfer in a variety of model studies and glycosylation reactions. The DMP group can be installed in one step from a commercially available thiol ( 2,6-dimethylthiophenol) and is useable as a glycosyl donor. On the basis of these features, the DMP group is proposed as a convenient and improved aglycon for thioglycosides.

  DOI：

  10.1021/ja063247q

文献信息

• IPy2BF4-Mediated Glycosylation and Glycosyl Fluoride Formation
  作者：Kuo-Ting Huang、Nicolas Winssinger

  DOI：10.1002/ejoc.200700038

  日期：2007.4

  facile method to convert thioglycosides to glycosyl fluorides with Ipy2BF4 (py = pyridine) is presented. Alternatively, activation of thioglycosides with Ipy2BF4 in the presence of acids and glycosyl acceptors led to glycosylation reactions. Perbenzylated (armed) glycosyl donors yielded predominantly the β-anomeric product. This methodology is compatible with one-pot sequential glycosylation.

  介绍了一种使用 Ipy2BF4 (py = 吡啶) 将硫糖苷转化为糖基氟的简便方法。或者，在酸和糖基受体存在下用 Ipy2BF4 激活硫糖苷会导致糖基化反应。过苄基化（武装）糖基供体主要产生 β-异头产物。这种方法与一锅顺序糖基化兼容。
• One-pot synthesis of a pentasaccharide with antibiotic activity against Helicobacter pylori
  作者：Ping Wang、Heeseob Lee、Minoru Fukuda、Peter H. Seeberger

  DOI：10.1039/b618662a

  日期：——

  A pentasaccharide that contains the alpha-1,4-GlcNAc mucin core two-branched O-glycan has been synthesized by a one-pot, two-step glycosylation strategy; this particular carbohydrate motif may provide protection against H. pylonri induced pathologies since the synthetic pentasaccharide inhibits cholesterol alpha-glucosyltransferase (IC50 of 0.47 mM).

  已经通过一锅两步糖基化策略合成了含有α-1,4-GlcNAc粘蛋白核心两支O聚糖的五糖。由于合成的五糖会抑制胆固醇α-葡萄糖基转移酶（IC50为0.47 mM），因此这种特殊的碳水化合物基序可提供针对幽门螺杆菌诱导的病理的保护作用。
• FORMAL SYNTHESIS OF CYTOSAMINE—A COMPONENT OF NUCLEOSIDE ANTIBIOTICS, THE AMICETIN FAMILY
  作者：Hideyuki Sugimura、Ken-ichi Watanabe

  DOI：10.1081/scc-100104831

  日期：2001.1

  A facile route to a synthetic precursor of the nucleoside antibiotics, amicetins, was investigated employing stable phenyl thioglycosides as key building blocks.

  使用稳定的苯基硫糖苷作为关键构建块，研究了合成核苷抗生素前体阿米西汀的简便途径。
• Anchimeric assistance by the anomeric phenylthio group in the nucleophilic substitution of a 6-O-trifluoromethanesulfonyl-β-d-galactopyranoside
  作者：Muriel Compain-Batissou、Lamya Mesrari、Daniel Anker、Alain Doutheau

  DOI：10.1016/s0008-6215(99)00048-8

  日期：1999.3

  Abstract Nucleophilic displacement by the cyanide anion of the 6- O -triflyl group in phenyl 6- O -triflyl-2,3-di- O -benzyl-4- O - p -methoxybenzyl-1-thio-β- d -galactopyranoside takes place via an intermediate 1,6-sulfonium salt resulting from the anchimeric assistance of the C-1 phenylthio group.

  摘要苯基6-O-triflyl-2,3-di-O-苄基-4-O-对甲氧基苄基-1-硫代-β-d-吡喃半乳糖苷中6-O-triflyl基团的氰化物阴离子可亲核取代通过由C-1苯硫基的邻氨基苯甲酸辅助产生的中间体1，6-s盐发生。
• An efficient and highly stereoselective α(1→4) glycosylation between two d-galacturonic acid ester derivatives
  作者：Didier Magaud、Cyrille Grandjean、Alain Doutheau、Daniel Anker、Vladimir Shevchik、Nicole Cotte-Pattat、Janine Robert-Baudouy

  DOI：10.1016/s0040-4039(96)02308-8

  日期：1997.1

  The highly stereoselective α(1→4) coupling between two d-galacturonic acid ester derivatives was accomplished in good yields, for the first time, using a phenylthioglycoside as donor. The method was designed to prepare d-galacturonic acid oligomers with methyl ester groups in definite positions.

  使用苯硫代糖苷作为供体，首次以高收率实现了两个d-半乳糖醛酸酯衍生物之间的高度立体选择性α（1→4）偶联。设计该方法以制备在特定位置具有甲酯基的d-半乳糖醛酸低聚物。