indolo[1,2-a]octahydro-1-thiaoxy-3a-azacyclopenta[d]naphthylen-3-one | 269407-41-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氮杂萘
• 英文名称: indolo[1,2-a]octahydro-1-thiaoxy-3a-azacyclopenta[d]naphthylen-3-one
• 英文别名: 20-Oxo-20lambda4-thia-10,17-diazapentacyclo[11.7.0.01,17.02,10.04,9]icosa-2,4,6,8-tetraen-18-one；20-oxo-20λ4-thia-10,17-diazapentacyclo[11.7.0.01,17.02,10.04,9]icosa-2,4,6,8-tetraen-18-one
• CAS: 269407-41-2
• 化学式: C₁₇H₁₈N₂O₂S
• 分子量: 314.408
• InChiKey: JRJNKCMPFWGBFE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  22
• 可旋转键数：
  0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  61.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  indolo[1,2-a]octahydro-1-thiaoxy-3a-azacyclopenta[d]naphthylen-3-one 在 乙酸酐 、 对甲苯磺酸 作用下， 以 甲苯 为溶剂， 反应 1.0h， 以92%的产率得到10,17-diaza-20-thiahexacyclo[11.7.0^1,17.0^2,10.0^3,19.0^4,9]icosa-2(3),4(9),5,7-tetraen-18-one
  参考文献：
  名称：

  A One-Pot Bicycloannulation Method for the Synthesis of Tetrahydroisoquinoline Systems

  摘要：

  A highly effective method for the synthesis of the core indolo[2,3-a]quinolizidine skeleton found in yohimbine is described. The reaction of N-monosubstituted thioamides with bromoalkenoyl chlorides furnishes thioisomunchnones as transient 1,3-dipoles that undergo ready intramolecular cycloaddition across the tethered pi-bond to give thio-bicycloannulated products in a one-pot operation. The stereochemical outcome of the intramolecular reaction is the consequence of an endo cycloaddition of the neighboring-bond across the transient thioisomunchnone dipole. A major limitation of the method is that when a hydrogen is present in the alpha-position of the thioamide the initially formed thio-N-acyliminium ion undergoes proton loss to produce a S ,N-ketene acetal at a faster rate than dipole formation. Treatment of tetrahydro-beta-carboline-1-thione with 2-bromooct-7-enoyl chloride followed by reductive removal of sulfur from the cycloadduct resulted in the formation of (+/-)-alloyahimbanone. Attempts to cycloadd the thioisomunchnone dipole across several nucleophilic-bonds failed, and instead, products derived from cyclization of the pi-bond onto the initially formed thio-N-acyliminium ion were formed. The resulting N,S-ketals were further converted into several tetrahydroisoquinoline alkaloids in good yield.

  DOI：

  10.1021/jo991742h
• 作为产物：
  描述：

  3-((2-indol-1-yl)ethyl)piperidin-2-one 在 劳森试剂 、 sodium periodate 作用下， 以 1,4-二氧六环 、 甲醇 、 二氯甲烷 、 水 、 甲苯 为溶剂， 反应 28.25h， 生成 indolo[1,2-a]octahydro-1-thiaoxy-3a-azacyclopenta[d]naphthylen-3-one
  参考文献：
  名称：

  A One-Pot Bicycloannulation Method for the Synthesis of Tetrahydroisoquinoline Systems

  摘要：

  A highly effective method for the synthesis of the core indolo[2,3-a]quinolizidine skeleton found in yohimbine is described. The reaction of N-monosubstituted thioamides with bromoalkenoyl chlorides furnishes thioisomunchnones as transient 1,3-dipoles that undergo ready intramolecular cycloaddition across the tethered pi-bond to give thio-bicycloannulated products in a one-pot operation. The stereochemical outcome of the intramolecular reaction is the consequence of an endo cycloaddition of the neighboring-bond across the transient thioisomunchnone dipole. A major limitation of the method is that when a hydrogen is present in the alpha-position of the thioamide the initially formed thio-N-acyliminium ion undergoes proton loss to produce a S ,N-ketene acetal at a faster rate than dipole formation. Treatment of tetrahydro-beta-carboline-1-thione with 2-bromooct-7-enoyl chloride followed by reductive removal of sulfur from the cycloadduct resulted in the formation of (+/-)-alloyahimbanone. Attempts to cycloadd the thioisomunchnone dipole across several nucleophilic-bonds failed, and instead, products derived from cyclization of the pi-bond onto the initially formed thio-N-acyliminium ion were formed. The resulting N,S-ketals were further converted into several tetrahydroisoquinoline alkaloids in good yield.

  DOI：

  10.1021/jo991742h

文献信息

• A One-Pot Bicycloannulation Method for the Synthesis of Tetrahydroisoquinoline Systems
  作者：Albert Padwa、L. Scott Beall、Todd M. Heidelbaugh、Bing Liu、Scott M. Sheehan

  DOI：10.1021/jo991742h

  日期：2000.5.1

  A highly effective method for the synthesis of the core indolo[2,3-a]quinolizidine skeleton found in yohimbine is described. The reaction of N-monosubstituted thioamides with bromoalkenoyl chlorides furnishes thioisomunchnones as transient 1,3-dipoles that undergo ready intramolecular cycloaddition across the tethered pi-bond to give thio-bicycloannulated products in a one-pot operation. The stereochemical outcome of the intramolecular reaction is the consequence of an endo cycloaddition of the neighboring-bond across the transient thioisomunchnone dipole. A major limitation of the method is that when a hydrogen is present in the alpha-position of the thioamide the initially formed thio-N-acyliminium ion undergoes proton loss to produce a S ,N-ketene acetal at a faster rate than dipole formation. Treatment of tetrahydro-beta-carboline-1-thione with 2-bromooct-7-enoyl chloride followed by reductive removal of sulfur from the cycloadduct resulted in the formation of (+/-)-alloyahimbanone. Attempts to cycloadd the thioisomunchnone dipole across several nucleophilic-bonds failed, and instead, products derived from cyclization of the pi-bond onto the initially formed thio-N-acyliminium ion were formed. The resulting N,S-ketals were further converted into several tetrahydroisoquinoline alkaloids in good yield.