ethyl 3,4,6-tri-O-benzyl-1-thio-β-D-mannopyranoside | 158852-32-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 3,4,6-tri-O-benzyl-1-thio-β-D-mannopyranoside
• 英文别名: (2S,3S,4R,5R,6R)-2-ethylsulfanyl-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-ol
• CAS: 158852-32-5
• 化学式: C₂₉H₃₄O₅S
• 分子量: 494.652
• InChiKey: NTZPSRLDRFUPBG-FOECPVOOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.7
• 重原子数：
  35
• 可旋转键数：
  12
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  82.4
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  ethyl 3,4,6-tri-O-benzyl-1-thio-β-D-mannopyranoside 在 二叔丁基过氧化物 、 三乙胺 、 三氟甲烷磺酸甲酯 作用下， 以 二氯甲烷 为溶剂， 反应 7.5h， 生成
  参考文献：
  名称：

  A Highly Convergent Total Synthetic Route to Glycopeptides Carrying a High-Mannose Core Pentasaccharide DomainN-linked to a Natural Peptide Motif

  摘要：

  AbstractN‐Linked glycopeptides were synthesized by condensation of a highmannose anomeric amine bearing a pentasaccharide with aspartic‐acid‐containing tri‐ and pentapeptides through the agency of IIDQ. The pentasaccharide portion, corresponding to the „core”︁ region of all asparagine‐linked glycoproteins, was assembled by means of glycal‐derived thioethyl donors and glycal acceptors. The central mannose residue was established by inversion of the C2 hydroxyl of a glucosyl precursor in the pentasaccharide. The protecting‐group scheme employed allows the extension of the pentasaccharide through the terminal mannose units. While a fully convergent coupling of the high‐mannose carbohydrate to the peptide domain has thus been accomplished for the first time with a fully synthetic sugar, the stereochemical integrity of the anomeric center of the carbohydrate domain was not maintained and a mixture of glycopeptides was obtained.

  DOI：

  10.1002/chem.19970031011
• 作为产物：
  描述：

  ethyl 3,4,6-tri-O-benzyl-1-thio-β-D-glucopyranoside 在 sodium tetrahydroborate 、 乙酸酐 、 二甲基亚砜 作用下， 以 吡啶 、 甲醇 、 二氯甲烷 为溶剂， 生成 ethyl 3,4,6-tri-O-benzyl-1-thio-β-D-mannopyranoside
  参考文献：
  名称：

  糖基衍生的硫乙基糖基供体与糖基受体的偶联。糖醛组装范围的进展

  摘要：

  糖醛通过 1,2-脱水糖中间体转化为硫乙基糖基供体。检查了 C-2 位置的各种参与基团的 β-葡萄糖基、β-半乳糖基和 α-甘露糖基键的形成。使用涉及硫乙基 2-新戊酰基糖基供体和糖受体的新型偶联方案制备了许多二糖。使用这种方法，以高产率制备了仅含有 β-葡萄糖基-(1→4) 键的线性四糖。α-甘露糖基化和 C2 分支的现成应用是该方法的其他标志。

  DOI：

  10.1021/ja971640d

文献信息

• Coupling of Glycal Derived Thioethyl Glycosyl Donors with Glycal Acceptors. An Advance in the Scope of the Glycal Assembly
  作者：Peter H. Seeberger、Matthias Eckhardt、Clare E. Gutteridge、Samuel J. Danishefsky

  DOI：10.1021/ja971640d

  日期：1997.10.1

  Glycals were converted into thioethyl glycosyl donors through 1,2-anhydrosugar intermediates. Various participating groups in the C-2 position were examined for formation of β-glucosyl, β-galactosyl, and α-mannosyl linkages. A number of disaccharides was prepared employing a novel coupling protocol involving thioethyl 2-pivaloyl glycosyl donors and glycal acceptors. Using this methodology, a linear

  糖醛通过 1,2-脱水糖中间体转化为硫乙基糖基供体。检查了 C-2 位置的各种参与基团的 β-葡萄糖基、β-半乳糖基和 α-甘露糖基键的形成。使用涉及硫乙基 2-新戊酰基糖基供体和糖受体的新型偶联方案制备了许多二糖。使用这种方法，以高产率制备了仅含有 β-葡萄糖基-(1→4) 键的线性四糖。α-甘露糖基化和 C2 分支的现成应用是该方法的其他标志。
• 3,4,6-Tri-O-benzyl-.alpha.-D-arabino-hexopyranos-2-ulosyl Bromide: A Versatile Glycosyl Donor for the Efficient Generation of .beta.-D-Mannopyranosidic Linkages
  作者：Frieder W. Lichtenthaler、Thomas Schneider-Adams

  DOI：10.1021/jo00101a035

  日期：1994.11

  An expedient four-step sequence is described for the conversion of acetobromoglucose into the title 2-oxohexosyl (''ulosyl'') bromide 4. Due to its O-benzyl protection, 4 is considerably more reactive than its acylated analogs 1-3: Ag2CO3-promoted glycosidations with 2-propanol, diacetone-galactose, and methyl 2,3-O-isopropylidene-alpha-L-rhamnoside are complete within minutes and, in addition, are endowed with beta-specificity. This renders ulosyl bromide 4 a most propitious, indirect beta-D-mannosyl donor, inasmuch as the borohydride reduction of the beta-D-glycosiduloses formed (14-16 --> 19, 21, and 22) proceeds with manno selectivities of >20:1. Comparative evaluation of the manno/gluco ratios obtained in all 21 beta-D-arabino hexosidulose reductions (Table 1) reveals the 3-O-blocking group to have a pronounced effect on the outcome: >20:1 in cases with a 3-O-benzyl group versus only 2:1 to 3:1 in the presence of 3-O-acyl functions.
• A highly convergent synthesis of an N-linked glycopeptide presenting the H-type 2 human blood group determinant
  作者：Zhi-Guang Wang、J. David Warren、Vadim Y. Dudkin、Xufang Zhang、Ulrich Iserloh、Michael Visser、Matthias Eckhardt、Peter H. Seeberger、Samuel J. Danishefsky

  DOI：10.1016/j.tet.2006.02.080

  日期：2006.5

  The total synthesis of an H-type blood group determinant in a model biological setting is described. The construct is comprised of a high mannose core structure with projecting lactose spacers, culminating in a two-copy presentation of the H-type blood group determinant itself. Key reactions that were used in this construction include sulfonamidohydroxylation (see 15 -> 18) and benzoate-directed glycosylation via an activated thiophenyl donor (see 34 -> 36). Another key strategic element involved the epimerization of an interior core glucoside to reach the P-mannoside (see 37 -> 38) required in the ring C sugar of the high mannose core. (c) 2006 Elsevier Ltd. All rights reserved.
• A Highly Convergent Total Synthetic Route to Glycopeptides Carrying a High-Mannose Core Pentasaccharide DomainN-linked to a Natural Peptide Motif
  作者：Samuel J. Danishefsky、Shuanghua Hu、Pier F. Cirillo、Matthias Eckhardt、Peter H. Seeberger

  DOI：10.1002/chem.19970031011

  日期：1997.10

  AbstractN‐Linked glycopeptides were synthesized by condensation of a highmannose anomeric amine bearing a pentasaccharide with aspartic‐acid‐containing tri‐ and pentapeptides through the agency of IIDQ. The pentasaccharide portion, corresponding to the „core”︁ region of all asparagine‐linked glycoproteins, was assembled by means of glycal‐derived thioethyl donors and glycal acceptors. The central mannose residue was established by inversion of the C2 hydroxyl of a glucosyl precursor in the pentasaccharide. The protecting‐group scheme employed allows the extension of the pentasaccharide through the terminal mannose units. While a fully convergent coupling of the high‐mannose carbohydrate to the peptide domain has thus been accomplished for the first time with a fully synthetic sugar, the stereochemical integrity of the anomeric center of the carbohydrate domain was not maintained and a mixture of glycopeptides was obtained.