(8aS,12aS,13aS)-2,3,12a-trimethoxy-5,6,8,8a,9,10,11,12,13,13a-decahydroisoquinolino[2,1-b]isoquinolin-11-ol | 136587-51-4

• 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: (8aS,12aS,13aS)-2,3,12a-trimethoxy-5,6,8,8a,9,10,11,12,13,13a-decahydroisoquinolino[2,1-b]isoquinolin-11-ol
• CAS: 136587-51-4；136657-34-6
• 化学式: C₂₀H₂₉NO₄
• 分子量: 347.455
• InChiKey: IWQVUOLLJMDRGF-WAKNLNFQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.55
• 重原子数：
  25.0
• 可旋转键数：
  3.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.7
• 拓扑面积：
  51.16
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  (8aS,12aS,13aS)-2,3,12a-trimethoxy-5,6,8,8a,9,10,11,12,13,13a-decahydroisoquinolino[2,1-b]isoquinolin-11-ol 在 草酰氯 、 二甲基亚砜 、 三乙胺 作用下， 生成 (S)-(-)-2,3-dimethoxy-5,6,8,8a,9,10,13,13a-octahydro-11H-dibenzoquinolizin-1-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
• 作为产物：
  描述：

  (S)-1-<(5-methoxy-1,4-cyclohexadienyl)methyl>-1,2,3,4-tetrahydroisoquinoline 在 水 、 sodium cyanoborohydride 、 溶剂黄146 作用下， 以 溶剂黄146 为溶剂， 反应 29.25h， 生成 (8aS,12aS,13aS)-2,3,12a-trimethoxy-5,6,8,8a,9,10,11,12,13,13a-decahydroisoquinolino[2,1-b]isoquinolin-11-ol
  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