4-(2-bromophenoxy)-coumarin | 1421194-34-4

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 香豆素及其衍生物
• 英文名称: 4-(2-bromophenoxy)-coumarin
• CAS: 1421194-34-4
• 化学式: C₁₅H₉BrO₃
• 分子量: 317.139
• InChiKey: BJSFVSWVAKSIDD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.35
• 重原子数：
  19.0
• 可旋转键数：
  2.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  39.44
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  4-(2-bromophenoxy)-coumarin 在 trans-di(μ-acetato)bis[o-(di-o-tolylphosphino)benzyl]dipalladium(II) 、 potassium carbonate 作用下， 以 1,4-二氧六环 为溶剂， 反应 24.0h， 以97%的产率得到6H-苯并呋喃并[3,2-c][1]苯并吡喃-6-酮
  参考文献：
  名称：

  Efficient synthesis of coumarin-based tetra and pentacyclic rings using phospha-palladacycles

  摘要：

  Palladacycle 4 已被证明是香豆基醚和吡喃基醚分子内 C-H 键官能化的有效催化剂，可合成三环、四环和五环化合物，其中一些化合物通过 X 射线分析进行了表征。还进行了微波辅助一锅法从 4-氯香豆素获得四环。使用 GC、UV-Vis 和 ESI MS 进行了机理研究。

  DOI：

  10.1039/c3ra43821j

文献信息

• [Pd(PPh3)2(saccharinate)2]—general catalyst for Suzuki–Miyaura, Negishi cross-coupling and C–H bond functionalization of coumaryl and pyrone substrates
  作者：Parin Shah、M. Dolores Santana、Joaquín García、J. Luis Serrano、Minal Naik、Suhas Pednekar、Anant R. Kapdi

  DOI：10.1016/j.tet.2012.12.030

  日期：2013.2

  The potential of complex [Pd(PPh3)(2)(saccharinate)(2)] 1 in catalyzing Suzuki-Miyaura cross-coupling of 4-halo and 4-bromomethyl coumaryl and pyrone substrates with different aryl boronic acids has been explored. Excellent yields of the desired products are obtained in competitive reaction time and under relatively mild conditions. Negishi cross-coupling of 4-coumaryl tosylate with aryl and allcylzinc reagents has also been performed with good yields of the cross-coupled products obtained in most cases. Intramolecular C-H bond functionalization of coumaryl ethers also furnished very high yields of synthetically attractive tetracyclic ring systems exhibiting the potential of I as a powerful catalyst in synthetically important reactions. (C) 2012 Elsevier Ltd. All rights reserved.