2-bromo-5-iodo-1H-indole | 1240045-43-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吲哚及其衍生物
• 英文名称: 2-bromo-5-iodo-1H-indole
• CAS: 1240045-43-5
• 化学式: C₈H₅BrIN
• 分子量: 321.943
• InChiKey: IAOREMAGWSURLQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  15.8
• 氢给体数：
  1
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  2-(2,2-dibromovinyl)-4-iodoaniline 在 palladium diacetate 、 potassium carbonate 、 tri tert-butylphosphoniumtetrafluoroborate 作用下， 以 甲苯 为溶剂， 反应 14.08h， 以68%的产率得到2-bromo-5-iodo-1H-indole
  参考文献：
  名称：

  The Role of Reversible Oxidative Addition in Selective Palladium(0)-Catalyzed Intramolecular Cross-Couplings of Polyhalogenated Substrates: Synthesis of Brominated Indoles

  摘要：

  A Pd(0)-catalyzed C-N bond-forming reaction leading to the synthesis of brominated indoles is described. The use of the phosphine ligand PtBu3 is necessary for reactivity. It is proposed that the bulky ligand serves to prevent inhibition of the catalyst by facilitating reversible oxidative addition into the product C-Br bond. Intramolecular coupling of a vinyl bromide in the presence of an aryl iodide can take place, demonstrating unprecedented levels of selectivity.

  DOI：

  10.1021/ja1052335

文献信息

• Microwave irradiated synthesis of 2-bromo(chloro)indoles via intramolecular cyclization of 2-(gem-dibromo(chloro)vinyl)anilines in the presence of TBAF under metal-free conditions
  作者：Min Wang、Pinhua Li、Wei Chen、Lei Wang

  DOI：10.1039/c4ra00603h

  日期：——

  2-Bromo(chloro)indoles were readily prepared through TBAF-promoted intramolecular cyclization of 2-(gem-dibromo(chloro)vinyl)anilines in excellent yields under metal-free and microwave irradiation conditions.

  2-溴（氯）吲哚可通过TBAF促进的2-（gem-二溴（氯）乙烯）苯胺的分子内环化反应，在无金属和微波辐射条件下，以极高的产率轻松制备。
• The facile synthesis of 2-bromoindoles via Cs₂CO₃-promoted intramolecular cyclization of 2-(gem-dibromovinyl)anilines under transition-metal-free conditions
  作者：Pinhua Li、Yong Ji、Wei Chen、Xiuli Zhang、Lei Wang

  DOI：10.1039/c2ra22172a

  日期：——

  2-Bromoindoles were readily prepared through a facile Cs2CO3-promoted intramolecular cyclization of 2-(gem-bromovinyl)-N-methylsulfonylanilines in excellent yields under transition-metal-free conditions. This methodology could be extended to the synthesis of corresponding 2-chloroindoles. The reaction mechanism suggested that cyclization occurs through a key intermediate, phenylethynyl bromide, followed by cyclization in one-pot.

  在不含过渡金属的条件下，通过 Cs2CO3 促进的 2-(偕溴乙烯基)-N-甲基磺酰基苯胺的分子内环化，可以轻松制备 2-溴吲哚，收率优异。该方法可以扩展到相应的 2-氯吲哚的合成。反应机理表明，环化是通过关键中间体苯乙炔基溴发生的，然后是一锅环化。