2,3,5,7a-Tetrahydro-7-(tert-butylthio)-1H-pyrrolizine | 128845-14-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯嗪
• 英文名称: 2,3,5,7a-Tetrahydro-7-(tert-butylthio)-1H-pyrrolizine
• 英文别名: 7-tert-butylsulfanyl-2,3,5,8-tetrahydro-1H-pyrrolizine
• CAS: 128845-14-7
• 化学式: C₁₁H₁₉NS
• 分子量: 197.345
• InChiKey: LYXVRFRWGYLAGG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  13
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.82
• 拓扑面积：
  28.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2,3,5,7a-Tetrahydro-7-(tert-butylthio)-1H-pyrrolizine 在 盐酸 作用下， 生成 六氢-吡咯嗪-1-酮
  参考文献：
  名称：

  Synthesis of (-)-slaframine and related indolizidines

  摘要：

  An enantioselective synthesis of the indolizidine alkaloid (-)-slaframine 1 is reported. Reductive double cyclization of the azido epoxy tosylate 48 afforded the indolizidine 52, which was converted to (-)-slaframine in two steps. The cyclization substrate 48 was prepared in optically pure form from L-glutamic acid. A similar sequence starting with the epoxide 49 allowed the synthesis of (-)-1,8a-diepislaframine 56. Other routes to slaframine were investigated, often using an intramolecular cycloaddition of an azide with an alkene as a key step. Although these routes did not produce slaframine, they illustrated novel and efficient methods for the assembly of the indolizidine skeleton. Cyclization of the azidodiene 20 afforded the indolizidine 21 in one step as a single diastereomer, presumably a result of a chairlike transition state in the initial dipolar cycloaddition. Desulfurization and deprotection produced (-)-8a-epidesacetoxyslaframine 27. Cyclopropylimine rearrangement of 30 gave the indolizidine 31, which was also converted into (-)-8a-epidesacetoxyslaframine 27. Dipolar cycloaddition of 38 gave the 1-pyrroline 39, which was converted to the indolizidine 40 in one operation using Evans' double alkylation of the 1-metalloenamine derivative of 40. Attempted oxidation of 40 to the ketone 41 was unsuccessful, precluding a reductive amination approach to slaframine.

  DOI：

  10.1021/jo00040a045
• 作为产物：
  描述：

  1-<(1,1-Dimethylethyl)thio>-1-propyne 在 sodium azide 、 lithium diisopropyl amide 作用下， 以 氘代氯仿 、 二甲基亚砜 为溶剂， 反应 16.5h， 生成 2,3,5,7a-Tetrahydro-7-(tert-butylthio)-1H-pyrrolizine
  参考文献：
  名称：

  The synthesis of pyrrolizidines and indolizidines by the intramolecular cycloaddition of azides with electron-rich 1,3-dienes. A synthetic equivalent of a nitrene-diene cycloaddition

  摘要：

  DOI：

  10.1021/jo00309a016

文献信息

• PEARSON, WILLIAM H.;BERGMEIER, STEPHEN C.;DEGAN, SAMIR;LIN, KO-CHUNG;POON+, J. ORG. CHEM., 55,(1990) N2, C. 5719-5738
  作者：PEARSON, WILLIAM H.、BERGMEIER, STEPHEN C.、DEGAN, SAMIR、LIN, KO-CHUNG、POON+

  DOI：——

  日期：——
• The synthesis of pyrrolizidines and indolizidines by the intramolecular cycloaddition of azides with electron-rich 1,3-dienes. A synthetic equivalent of a nitrene-diene cycloaddition
  作者：William H. Pearson、Stephen C. Bergmeier、Samir Degan、Ko Chung Lin、Yam Foo Poon、Jeffrey M. Schkeryantz、John P. Williams

  DOI：10.1021/jo00309a016

  日期：1990.10
• Synthesis of (-)-slaframine and related indolizidines
  作者：William H. Pearson、Stephen C. Bergmeier、John P. Williams

  DOI：10.1021/jo00040a045

  日期：1992.7

  An enantioselective synthesis of the indolizidine alkaloid (-)-slaframine 1 is reported. Reductive double cyclization of the azido epoxy tosylate 48 afforded the indolizidine 52, which was converted to (-)-slaframine in two steps. The cyclization substrate 48 was prepared in optically pure form from L-glutamic acid. A similar sequence starting with the epoxide 49 allowed the synthesis of (-)-1,8a-diepislaframine 56. Other routes to slaframine were investigated, often using an intramolecular cycloaddition of an azide with an alkene as a key step. Although these routes did not produce slaframine, they illustrated novel and efficient methods for the assembly of the indolizidine skeleton. Cyclization of the azidodiene 20 afforded the indolizidine 21 in one step as a single diastereomer, presumably a result of a chairlike transition state in the initial dipolar cycloaddition. Desulfurization and deprotection produced (-)-8a-epidesacetoxyslaframine 27. Cyclopropylimine rearrangement of 30 gave the indolizidine 31, which was also converted into (-)-8a-epidesacetoxyslaframine 27. Dipolar cycloaddition of 38 gave the 1-pyrroline 39, which was converted to the indolizidine 40 in one operation using Evans' double alkylation of the 1-metalloenamine derivative of 40. Attempted oxidation of 40 to the ketone 41 was unsuccessful, precluding a reductive amination approach to slaframine.