5-(3',4'-dimethoxyphenyl)-2-methoxycyclohepta-2,4,6-trien-1-one | 129720-06-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 5-(3',4'-dimethoxyphenyl)-2-methoxycyclohepta-2,4,6-trien-1-one
• 英文别名: 2-methoxy-5-(3',4'-dimethoxyphenyl)cyclohepta-2,4,6-trien-1-one；5-(3,4-Dimethoxyphenyl)-2-methoxycyclohepta-2,4,6-trien-1-one
• CAS: 129720-06-5
• 化学式: C₁₆H₁₆O₄
• 分子量: 272.301
• InChiKey: YFSUSVCFFHLZCN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  4-溴黎芦醚 在 palladium diacetate 四丁基氟化铵 、 magnesium 、 三苯基膦 作用下， 以 四氢呋喃 为溶剂， 生成 5-(3',4'-dimethoxyphenyl)-2-methoxycyclohepta-2,4,6-trien-1-one
  参考文献：
  名称：

  Efforts Directed toward the Synthesis of Colchicine:  Application of Palladium-Catalyzed Siloxane Cross-Coupling Methodology

  摘要：

  Colchicine is an important and synthetically challenging natural product. The key synthetic step in this approach to the synthesis of colchicine involved a palladium-catalyzed cross-coupling reaction between 5-bromotropolone (4) and an aryl siloxane to form the aryl-tropolone bond. The coupling of a variety of highly functionalized aryl siloxane derivatives was investigated and optimized coupling conditions were developed. It was discovered that a palladium catalyst with a high degree of phosphine ligand coordination (5 equiv of phosphine/mol Pd) was necessary to efficiently couple aryl siloxanes with 5-bromotropolone (4). In addition, the coupling approach has provided a direct comparison between siloxane and boronic acid coupling technologies that demonstrated that aryl siloxanes and boronic acids produce similar yields of highly functionalized biaryl products.

  DOI：

  10.1021/jo051636h

文献信息

• Banwell, Martin G.; Cameron, Jennifer M.; Collis, Maree P., Australian Journal of Chemistry, 1991, vol. 44, # 5, p. 705 - 728
  作者：Banwell, Martin G.、Cameron, Jennifer M.、Collis, Maree P.、Crisp, Geoffrey T.、Gable, Robert W.、'et al.

  DOI：——

  日期：——
• BANWELL, MARTIN G.;CAMERON, JENNIFER M.;COLLIS, MAREE P.;CRISP, GEOFFREY +, AUSTRAL. J. CHEM., 44,(1991) N, C. 705-728
  作者：BANWELL, MARTIN G.、CAMERON, JENNIFER M.、COLLIS, MAREE P.、CRISP, GEOFFREY +

  DOI：——

  日期：——
• Efforts Directed toward the Synthesis of Colchicine:  Application of Palladium-Catalyzed Siloxane Cross-Coupling Methodology
  作者：W. Michael Seganish、Christopher J. Handy、Philip DeShong

  DOI：10.1021/jo051636h

  日期：2005.10.1

  Colchicine is an important and synthetically challenging natural product. The key synthetic step in this approach to the synthesis of colchicine involved a palladium-catalyzed cross-coupling reaction between 5-bromotropolone (4) and an aryl siloxane to form the aryl-tropolone bond. The coupling of a variety of highly functionalized aryl siloxane derivatives was investigated and optimized coupling conditions were developed. It was discovered that a palladium catalyst with a high degree of phosphine ligand coordination (5 equiv of phosphine/mol Pd) was necessary to efficiently couple aryl siloxanes with 5-bromotropolone (4). In addition, the coupling approach has provided a direct comparison between siloxane and boronic acid coupling technologies that demonstrated that aryl siloxanes and boronic acids produce similar yields of highly functionalized biaryl products.