rac-(3R,3aS,5aR,6R,8aS,11aS,11bS,11cR,12S)-11b-(3-(benzyloxy)propyl)-3,5a-dimethyltetradecahydro-2H-1,6,8a-(epimethanetriyl)azuleno[5,4-g]indole | 138435-56-0

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: rac-(3R,3aS,5aR,6R,8aS,11aS,11bS,11cR,12S)-11b-(3-(benzyloxy)propyl)-3,5a-dimethyltetradecahydro-2H-1,6,8a-(epimethanetriyl)azuleno[5,4-g]indole
• CAS: 138435-56-0
• 化学式: C₂₉H₄₁NO
• 分子量: 419.651
• InChiKey: WRTMLJOFMXFBPJ-RHCMXQRJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.3
• 重原子数：
  31.0
• 可旋转键数：
  6.0
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.79
• 拓扑面积：
  12.47
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为产物：
  描述：

  rac-(3aR,5aS,6S,8aR,11aR,11bR,11cS,12R)-11b-(3-(benzyloxy)propyl)-5a-methyl-3-methylenetetradecahydro-2H-1,6,8a-(epimethanetriyl)azuleno[5,4-g]indole 在 palladium on activated charcoal 氢气 作用下， 以 乙醇 、 乙酸乙酯 为溶剂， 生成 rac-(3R,3aR,5aS,6S,8aR,11aR,11bR,11cS,12R)-11b-(3-(benzyloxy)propyl)-3,5a-dimethyltetradecahydro-2H-1,6,8a-(epimethanetriyl)azuleno[5,4-g]indole 、 rac-(3R,3aS,5aR,6R,8aS,11aS,11bS,11cR,12S)-11b-(3-(benzyloxy)propyl)-3,5a-dimethyltetradecahydro-2H-1,6,8a-(epimethanetriyl)azuleno[5,4-g]indole
  参考文献：
  名称：

  Daphniphyllum alkaloids. 14. Total synthesis of (.+-.)-bukittinggine

  摘要：

  The unique heptacyclic Daphniphyllum alkaloid bukittinggine (1) has been prepared by total synthesis. The basic secodaphnane nucleus was fashioned in one step by application of the tetracyclization process to dihydroxy diether 5. The pyrrolidine ring in 1 was formed by a Pd(II)-catalyzed oxidative cyclization of 19 to give hexacyclic amine 32. Hydrogenation of 32 proceeded with little diastereoselectivity in establishing the final stereocenter in 1. However, when 32 was treated to the sequence of hydroboration/oxidation, tosylation, and reduction, excellent control of stereochemistry was observed in the formation of 33. Debenzylation of 33 (Na-liquid NH3), followed by regiospecific oxidative lactonization of diol 36 (Fetizon's reagent), afforded (+/-)-bukittinggine (1). The synthesis required 18 steps (9 --> 10 --> 11 --> 12 --> 13 --> 14 --> 15 --> 8 --> 16 --> 17 --> 18 --> 5 --> 19 --> 32 --> 35 --> 33 --> 36 --> 1) and delivered racemic bukittinggine in 3% overall yield.

  DOI：

  10.1021/jo00035a011