1-[(4aS,6R,7S,8S,8aS)-8-hydroxy-3-methyl-7-phenylmethoxy-6-(phenylmethoxymethyl)-6,7,8,8a-tetrahydro-4aH-pyrano[2,3-b][1,4]oxathiin-2-yl]ethanone

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 1-[(4aS,6R,7S,8S,8aS)-8-hydroxy-3-methyl-7-phenylmethoxy-6-(phenylmethoxymethyl)-6,7,8,8a-tetrahydro-4aH-pyrano[2,3-b][1,4]oxathiin-2-yl]ethanone
• 化学式: C₂₅H₂₈O₆S
• 分子量: 456.56
• InChiKey: WUYSQXJGOOIPRC-SBSLQGDRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  32
• 可旋转键数：
  8
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  99.5
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  3-thiophthalimide-2,4-pentanedione 、 4,6-di-O-benzyl glucal 在 2,6-二甲基吡啶 作用下， 以 氯仿 为溶剂， 反应 144.0h， 以63%的产率得到1-[(4aR,6R,7S,8S,8aR)-8-hydroxy-3-methyl-7-phenylmethoxy-6-(phenylmethoxymethyl)-6,7,8,8a-tetrahydro-4aH-pyrano[2,3-b][1,4]oxathiin-2-yl]ethanone
  参考文献：
  名称：

  Novel Heterocycloaddition Reaction of Glycals

  摘要：

  Diacyl thione species 1 has been generated and reacted in situ with both pyranoid and furanoid glycals to form novel [4 + 2] cycloadducts. Factors such as protecting groups and configuration of substituents in the glycals along with medium effects were varied to discover influences on face selectivity and reactivity. A qualitative correlation of reactivity with the HOMO-LUMO gap between the glycal (HOMO) and the heterodienic species (LUMO) is observed. In one example, the isolation of byproducts suggests that the cycloaddition may in fact be stepwise.

  DOI：

  10.1021/jo981047u

文献信息

• Novel Bicylic Donors for the Synthesis of 2-Deoxy-β-Glycosides
  作者：Richard W. Franck、Cecilia H. Marzabadi

  DOI：10.1021/jo971934h

  日期：1998.4.1

  Novel bicyclic glycosyl donors have been prepared by the cycloaddition reaction of glycals with 3-thiono-2,4-pentanedione 17 followed by methylenation of the resulting ketone. Treatment of the heterocyclic donors with triflic acid in the presence of a variety of alcohol accepters leads to the formation of beta-glycosides in good yields and with excellent stereoselectivities. Desulfurization of the C-2 carbon-sulfur bonds gives the corresponding 2-deoxy-beta-glycosides. This method has been extended to the synthesis of glycosidic linkages found in the aureolic acid antibiotics. Tetra-N-butylammonium triflate proved to be a useful additive in these glycosylation reactions, suggesting an important role for triflate anion in stabilizing intermediates which are formed.