Synthesis of 1-Aryl-1<i>H</i>
-indazoles via a Ligand-Free Copper- Catalyzed Intramolecular Amination Reaction
作者:Fengjuan Shen、Xiaoliu Li、Xiaojuan Zhang、Zhanbin Qin、Qingmei Yin、Hua Chen、Jinchao Zhang
DOI:10.1002/cjoc.201190224
日期:2011.6
A general synthesis of 1‐aryl‐1‐H‐indazoles from o‐halogenated aryl aldehydes or ketones and aryl hydrazines was described. This protocol included an intermolecular condensation and a ligand‐free copper‐catalyzed intramolecular Ullmann‐type coupling reaction. This method was applied to a wide range of substrates to produce the indazole products in good yields.
描述了由邻卤代的芳基醛或酮和芳基肼合成1-芳基-1- H-吲唑的一般方法。该方案包括分子间缩合和无配体的铜催化的分子内Ullmann型偶联反应。该方法适用于多种底物,以高收率生产吲唑产品。