(11bR)-9,10-dimethoxy-1,3,4,6,7,11b-hexahydrobenzo[a]quinolizin-2-one | 841-95-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 四氢异喹啉
• 英文名称: (11bR)-9,10-dimethoxy-1,3,4,6,7,11b-hexahydrobenzo[a]quinolizin-2-one
• CAS: 841-95-2；20150-09-8；136657-36-8
• 化学式: C₁₅H₁₉NO₃
• 分子量: 261.321
• InChiKey: RTZZLKNSTLYSOA-CYBMUJFWSA-N

物化性质

• 熔点：
  150-151 °C
• 沸点：
  413.5±45.0 °C(Predicted)
• 密度：
  1.21±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  19
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.53
• 拓扑面积：
  38.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  ((S)-1-tert-Butoxymethyl-2-methyl-propyl)-[1-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-meth-(E)-ylidene]-amine 在 camphor-10-sulfonic acid 作用下， 以 四氢呋喃 为溶剂， 反应 1.5h， 生成 (11bR)-9,10-dimethoxy-1,3,4,6,7,11b-hexahydrobenzo[a]quinolizin-2-one
  参考文献：
  名称：

  Asymmetric synthesis of benzoquinolizidines: a formal synthesis of (-)-emetine

  摘要：

  Chiral formamidines affixed to tetrahydroisoquinoline derivatives affords the appropriate precursor 9 to various benzo[a]quinolizidines 2 and 3 and dibenzo[a,g]quinolizidines 4 in modest to high optical purity. Both 3 and 4 have been utilized in total syntheses of natural emetine 1, thus the route herein constitutes a formal total synthesis of 1. Furthermore, Mannich cyclizations of 1-alkylisoquinolines 18a-c proceeded with or without loss of absolute stereochemistry at the C-1 position. Explanation for this behavior is based upon whether a [3,3] rearrangement or a Mannich reaction takes place. The former results in virtually complete racemization of 18, whereas the latter totally conserves the chirality in 18. Finally, 1-alkynylisoquinolines of high optical purity were transformed, via the Overman protocol, to alkylidine benzo[a]quinolizidines 24 in good yield and to our knowledge, high enantiomeric excess.

  DOI：

  10.1021/jo00024a032

文献信息

• Asymmetric synthesis of benzoquinolizidines: a formal synthesis of (-)-emetine
  作者：Joseph W. Guiles、A. I. Meyers

  DOI：10.1021/jo00024a032

  日期：1991.11

  Chiral formamidines affixed to tetrahydroisoquinoline derivatives affords the appropriate precursor 9 to various benzo[a]quinolizidines 2 and 3 and dibenzo[a,g]quinolizidines 4 in modest to high optical purity. Both 3 and 4 have been utilized in total syntheses of natural emetine 1, thus the route herein constitutes a formal total synthesis of 1. Furthermore, Mannich cyclizations of 1-alkylisoquinolines 18a-c proceeded with or without loss of absolute stereochemistry at the C-1 position. Explanation for this behavior is based upon whether a [3,3] rearrangement or a Mannich reaction takes place. The former results in virtually complete racemization of 18, whereas the latter totally conserves the chirality in 18. Finally, 1-alkynylisoquinolines of high optical purity were transformed, via the Overman protocol, to alkylidine benzo[a]quinolizidines 24 in good yield and to our knowledge, high enantiomeric excess.