7-octahydro-2H-pyrido<1,2-a>pyrazine | 146367-40-0

• 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: 7-octahydro-2H-pyrido<1,2-a>pyrazine
• 英文别名: 7-[Bis(4-fluorophenyl)methylidene]-1,2,3,4,6,8,9,9a-octahydropyrido[1,2-a]pyrazine
• CAS: 146367-40-0
• 化学式: C₂₁H₂₂F₂N₂
• 分子量: 340.416
• InChiKey: NGJSMOXXGSUNAK-UHFFFAOYSA-N

物化性质

• 沸点：
  467.1±45.0 °C(Predicted)
• 密度：
  1.23±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  25
• 可旋转键数：
  2
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  15.3
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-氯-n-(2,6-二氯苯基)乙酰胺 、 7-octahydro-2H-pyrido<1,2-a>pyrazine 在 potassium carbonate 、 potassium iodide 作用下， 以 丙酮 为溶剂， 以77%的产率得到N-(2,6-dichlorophenyl)-7-octahydro-2H-pyrido<1,2-a>pyrazine-2-acetamide
  参考文献：
  名称：

  Synthesis and 2,7-functionalization of the bicyclic lactam 2-benzyloctahydropyrido[1,2-a]pyrazin-6-one

  摘要：

  This report describes the synthesis of the title compound 7 and its conversion into 2,7-substituted octahydro-2H-pyrido[1,2-a]pyrazines, i.e., bicyclic analogues of the monocyclic piperazine drug lidoflazine. The synthesis of 7 is based on a 3-fold amino substitution of methyl 6-chlor-5-oxohexanoate (12), initiated by displacement of chlorine with N-benzyl-N'-trityl-1,2-ethanediamine. The required trielectrophile 12 was prepared readily from commercially available diethyl 2-acetyl-glutarate. The 7-position of compound 7 was functionalized through reaction of the lactam anion with benzophenone electrophiles. Further elaboration into the target compounds 8-10 involved dehydration, reduction of the lactam group, and different modes of N-debenzylation. Conformational aspects for lactam compounds 17 and 18 and the modes of ring fusion for the diastereomeric amines 9 and 10 were examined by using proton NMR and infrared spectroscopy.

  DOI：

  10.1021/jo00055a023
• 作为产物：
  描述：

  2-benzyl-7-octahydro-2H-pyrido<1,2-a>pyrazine 在 氢氧化钾 作用下， 以 二氯甲烷 、 异丙醇 为溶剂， 反应 4.0h， 生成 7-octahydro-2H-pyrido<1,2-a>pyrazine
  参考文献：
  名称：

  Synthesis and 2,7-functionalization of the bicyclic lactam 2-benzyloctahydropyrido[1,2-a]pyrazin-6-one

  摘要：

  This report describes the synthesis of the title compound 7 and its conversion into 2,7-substituted octahydro-2H-pyrido[1,2-a]pyrazines, i.e., bicyclic analogues of the monocyclic piperazine drug lidoflazine. The synthesis of 7 is based on a 3-fold amino substitution of methyl 6-chlor-5-oxohexanoate (12), initiated by displacement of chlorine with N-benzyl-N'-trityl-1,2-ethanediamine. The required trielectrophile 12 was prepared readily from commercially available diethyl 2-acetyl-glutarate. The 7-position of compound 7 was functionalized through reaction of the lactam anion with benzophenone electrophiles. Further elaboration into the target compounds 8-10 involved dehydration, reduction of the lactam group, and different modes of N-debenzylation. Conformational aspects for lactam compounds 17 and 18 and the modes of ring fusion for the diastereomeric amines 9 and 10 were examined by using proton NMR and infrared spectroscopy.

  DOI：

  10.1021/jo00055a023

文献信息

• Synthesis and 2,7-functionalization of the bicyclic lactam 2-benzyloctahydropyrido[1,2-a]pyrazin-6-one
  作者：M. Ashty Saleh、Frans Compernolle、Stefan Van den Branden、Wim De Buysser、Georges Hoornaert

  DOI：10.1021/jo00055a023

  日期：1993.1

  This report describes the synthesis of the title compound 7 and its conversion into 2,7-substituted octahydro-2H-pyrido[1,2-a]pyrazines, i.e., bicyclic analogues of the monocyclic piperazine drug lidoflazine. The synthesis of 7 is based on a 3-fold amino substitution of methyl 6-chlor-5-oxohexanoate (12), initiated by displacement of chlorine with N-benzyl-N'-trityl-1,2-ethanediamine. The required trielectrophile 12 was prepared readily from commercially available diethyl 2-acetyl-glutarate. The 7-position of compound 7 was functionalized through reaction of the lactam anion with benzophenone electrophiles. Further elaboration into the target compounds 8-10 involved dehydration, reduction of the lactam group, and different modes of N-debenzylation. Conformational aspects for lactam compounds 17 and 18 and the modes of ring fusion for the diastereomeric amines 9 and 10 were examined by using proton NMR and infrared spectroscopy.