| 202745-28-6

• 分子结构分类: 有机化合物 - 生物碱及其衍生物 - 喜树碱
• CAS: 202745-28-6
• 化学式: C₂₅H₂₅N₃O₆
• 分子量: 463.49
• InChiKey: HJAICLVTEYXYJX-VWLOTQADSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.43
• 重原子数：
  34.0
• 可旋转键数：
  2.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  119.75
• 氢给体数：
  2.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  在 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 反应 3.0h， 以87%的产率得到10-氨基喜树碱
  参考文献：
  名称：

  A General Synthetic Approach to the (20S)-Camptothecin Family of Antitumor Agents by a Regiocontrolled Cascade Radical Cyclization of Aryl Isonitriles

  摘要：

  A general and efficient synthesis of (20S)-camptothecin (1a) is reported. A key common intermediate containing the pyridone and lactone (DE) rings of camptothecin and most derivatives was constructed from 2-trimethylsilyl-6-methoxypyridine by a series of metalation reactions and a Heck cyclization to provide an achiral bicyclic enol ether. Sharpless asymmetric dihydroxylation followed by lactol oxidation and iododesilylation produced the key intermediate in 94% enantiomeric excess. Alkylation with propargyl bromide and a cascade radical reaction with phenyl isonitrile then produced 1a. About 20 other penta- and hexacyclic analogues of camptothecin with differing single or multiple substituents at C7, C9, C10, C11, and/or C12 were made by changing the propargylating agent and the isonitrile. Included among these are several drug candidates and the approved drugs topotecan and irinotecan. The synthesis of the prodrug irinotecan is direct one that does not pass through the active metabolite. The use of ortho-trimethylsilyl-substituted isonitriles allows the regioselective synthesis of camptothecin analogues in cases where isomeric mixtures are formed from the parent isonitriles. The synthesis of the derivatives relies on the broad scope and functional group tolerance of the key cascade radical reaction.

  DOI：

  10.1002/(sici)1521-3765(199801)4:1<67::aid-chem67>3.0.co;2-f
• 作为产物：
  描述：

  (S)-4-乙基-4-羟基-6-碘-3-氧代-1H-吡喃并[3,4-C]-8-吡啶酮 在 六甲基二锡 、 sodium hydride 、 lithium bromide 作用下， 以 乙二醇二甲醚 、 N,N-二甲基甲酰胺 、 苯 为溶剂， 反应 25.42h， 生成
  参考文献：
  名称：

  A General Synthetic Approach to the (20S)-Camptothecin Family of Antitumor Agents by a Regiocontrolled Cascade Radical Cyclization of Aryl Isonitriles

  摘要：

  A general and efficient synthesis of (20S)-camptothecin (1a) is reported. A key common intermediate containing the pyridone and lactone (DE) rings of camptothecin and most derivatives was constructed from 2-trimethylsilyl-6-methoxypyridine by a series of metalation reactions and a Heck cyclization to provide an achiral bicyclic enol ether. Sharpless asymmetric dihydroxylation followed by lactol oxidation and iododesilylation produced the key intermediate in 94% enantiomeric excess. Alkylation with propargyl bromide and a cascade radical reaction with phenyl isonitrile then produced 1a. About 20 other penta- and hexacyclic analogues of camptothecin with differing single or multiple substituents at C7, C9, C10, C11, and/or C12 were made by changing the propargylating agent and the isonitrile. Included among these are several drug candidates and the approved drugs topotecan and irinotecan. The synthesis of the prodrug irinotecan is direct one that does not pass through the active metabolite. The use of ortho-trimethylsilyl-substituted isonitriles allows the regioselective synthesis of camptothecin analogues in cases where isomeric mixtures are formed from the parent isonitriles. The synthesis of the derivatives relies on the broad scope and functional group tolerance of the key cascade radical reaction.

  DOI：

  10.1002/(sici)1521-3765(199801)4:1<67::aid-chem67>3.0.co;2-f