3-(2-butenyloxymethyl)-4-iodo-2-methoxy-6-trimethylsilylpyridine | 174092-76-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3-(2-butenyloxymethyl)-4-iodo-2-methoxy-6-trimethylsilylpyridine
• 英文别名: [5-(But-2-enoxymethyl)-4-iodo-6-methoxypyridin-2-yl]-trimethylsilane
• CAS: 174092-76-3
• 化学式: C₁₄H₂₂INO₂Si
• 分子量: 391.324
• InChiKey: KHFMAGFTSHWDSQ-UHFFFAOYSA-N

物化性质

• 沸点：
  353.6±42.0 °C(Predicted)
• 密度：
  1.34±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.33
• 重原子数：
  19
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  31.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3-(2-butenyloxymethyl)-4-iodo-2-methoxy-6-trimethylsilylpyridine 在 palladium diacetate 四丁基溴化铵 、 potassium carbonate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 18.0h， 以69%的产率得到4-Ethyl-8-methoxy-6-trimethylsilanyl-1H-pyrano[3,4-c]pyridine
  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：

  2-溴-6-甲氧基吡啶 在 三乙基硅烷 、 正丁基锂 、 三氟乙酸 作用下， 以 四氢呋喃 为溶剂， 反应 11.0h， 生成 3-(2-butenyloxymethyl)-4-iodo-2-methoxy-6-trimethylsilylpyridine
  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

文献信息

• METHOD OF SYNTHESIZING CAMPTOTHECIN-RELATING COMPOUNDS
  申请人：KABUSHIKI KAISHA YAKULT HONSHA

  公开号：EP1378505B1

  公开（公告）日：2014-11-05
• EP1900740
  申请人：——

  公开号：——

  公开（公告）日：——