methyl 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside | 64495-87-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside
• CAS: 64495-87-0
• 化学式: C₂₇H₃₈O₁₇S
• 分子量: 666.655
• InChiKey: QEZSKZFOLCYLGI-STCAYSEOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.03
• 重原子数：
  45.0
• 可旋转键数：
  12.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.74
• 拓扑面积：
  211.79
• 氢给体数：
  0.0
• 氢受体数：
  18.0

反应信息

• 作为产物：
  描述：

  1,2,3,6,2',3',4',6'-octa-O-acetylmaltose 在 碘 、 六甲基二硅氮烷 作用下， 以 二氯甲烷 为溶剂， 反应 6.0h， 生成 methyl 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl-(1->4)-2,3,6-tri-O-acetyl-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  Streamlined Synthesis of Per-O-acetylated Sugars, Glycosyl Iodides, or Thioglycosides from Unprotected Reducing Sugars¹

  摘要：

  Solvent-free per-O-acetylation of sugars with stoichiometric acetic anhydride and catalytic iodine proceeds in high yield (90-99%) to give exclusively pyranose products as anomeric mixtures. Without workup, subsequent anomeric substitution employing iodine in the presence of hexamethyldisilane (i.e., TMS-I generated in situ) gives the corresponding glycosyl iodides in 75-95% isolated yield. Alternatively, and without workup, further treatment with dimethyl disulfide or thiol (ethanethiol or thiocresol) gives anomerically pure thioglycosides in more than 75% overall yield.

  DOI：

  10.1021/jo048890e

文献信息

• A Through-process for the Preparation of Methyl Per-<i>O</i>-acetyl 1-Thio-glycosides from Aldoses
  作者：Shinkiti Koto、Toyosaku Yoshida、Kazuhiro Takenaka、Shonosuke Zen

  DOI：10.1246/bcsj.55.3667

  日期：1982.11

  d-Glucose, d-galactose, d-mannose, d-xylose, l-arabinose, l-fucose, l-rhamnose, maltose, cellobiose, lactose, d-glucosamine, d-galactosamine, and d-mannosamine were converted into the corresponding methyl per-O-acetyl 1-thioglycopyranosides by way of a three-step (acetobromination, methylthioation, and acetylation) through-process in a single vessel.

  d-葡萄糖、d-半乳糖、d-甘露糖、d-木糖、l-阿拉伯糖、l-岩藻糖、l-鼠李糖、麦芽糖、纤维二糖、乳糖、d-葡萄糖胺、d-半乳糖胺和d-甘露糖胺通过一个反应器经过三步（溴乙酰化、甲硫化和乙酰化）转化为相应的甲基全乙酰化1-硫代糖呋喃糖苷。