4-ethynylbenzyl 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside | 1261138-98-0

• 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: 4-ethynylbenzyl 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside
• CAS: 1261138-98-0
• 化学式: C₂₃H₂₆O₁₀
• 分子量: 462.453
• InChiKey: ZDWWGUQRJMMIEZ-XNBWIAOKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.27
• 重原子数：
  33.0
• 可旋转键数：
  8.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  123.66
• 氢给体数：
  0.0
• 氢受体数：
  10.0

反应信息

• 作为反应物：
  描述：

  4-ethynylbenzyl 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside 在 甲醇 、 sodium methylate 作用下， 以 甲醇 为溶剂， 反应 16.0h， 以95%的产率得到4-ethynylbenzyl β-D-glucopyranoside
  参考文献：
  名称：

  An Insight into the Radical Thiol/Yne Coupling: The Emergence of Arylalkyne-Tagged Sugars for the Direct Photoinduced Glycosylation of Cysteine-Containing Peptides

  摘要：

  An explorative study of the Thiol-Yne Coupling (TYC) reaction has been carried out using an aliphatic (1-octyne) and an aromatic alkyne (phenylacetylene) and two alkanethiols (methyl thioglycolate and N-acetyl-L-cysteine methyl ester). The outcomes of the TYC reactions strongly depend on the experimental conditions (e.g., temperature, solvent, and alkyne/thiol ratio), but these can be properly adjusted to achieve selective production of either mono- or bis-coupling products. With respect to 1-octyne, phenylacetylene undergoes notably easier radical hydrothiolation, further showing a notably higher aptitude for monohydrothiolation exclusive of bis-hydrothiolation. The overall findings were exploited in glycosylation of cysteine derivatives as well as of cysteine-containing peptides. A sugar featuring an arylacetylene moiety gave rise to a true click-reaction, that is, glycosylation of the tripeptide glutathione in its native form, by means of virtually equimolar amounts of reagents. This reaction was successfully applied, under physiological conditions, to a cysteine-containing nonapeptide with marked advantages over the analogous Thiol-Ene Coupling (TEC) derivatization. A TYC/TEC sequence affording bis-armed cysteine derivatives through dual functionalization of an alkynyl sugar was additionally devised.

  DOI：

  10.1021/jo101906j
• 作为产物：
  描述：

  4-乙基苄醇 、 β-D-葡萄糖五乙酸酯 在 三氟化硼乙醚 作用下， 以 二氯甲烷 为溶剂， 反应 2.5h， 以45%的产率得到4-ethynylbenzyl 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside
  参考文献：
  名称：

  An Insight into the Radical Thiol/Yne Coupling: The Emergence of Arylalkyne-Tagged Sugars for the Direct Photoinduced Glycosylation of Cysteine-Containing Peptides

  摘要：

  An explorative study of the Thiol-Yne Coupling (TYC) reaction has been carried out using an aliphatic (1-octyne) and an aromatic alkyne (phenylacetylene) and two alkanethiols (methyl thioglycolate and N-acetyl-L-cysteine methyl ester). The outcomes of the TYC reactions strongly depend on the experimental conditions (e.g., temperature, solvent, and alkyne/thiol ratio), but these can be properly adjusted to achieve selective production of either mono- or bis-coupling products. With respect to 1-octyne, phenylacetylene undergoes notably easier radical hydrothiolation, further showing a notably higher aptitude for monohydrothiolation exclusive of bis-hydrothiolation. The overall findings were exploited in glycosylation of cysteine derivatives as well as of cysteine-containing peptides. A sugar featuring an arylacetylene moiety gave rise to a true click-reaction, that is, glycosylation of the tripeptide glutathione in its native form, by means of virtually equimolar amounts of reagents. This reaction was successfully applied, under physiological conditions, to a cysteine-containing nonapeptide with marked advantages over the analogous Thiol-Ene Coupling (TEC) derivatization. A TYC/TEC sequence affording bis-armed cysteine derivatives through dual functionalization of an alkynyl sugar was additionally devised.

  DOI：

  10.1021/jo101906j