A ligand-free copper catalyzed approach has been developed to the synthesis of 3,4,5-triaryl-1,2,4-triazoles and 2,5-diaryl-1,3,4-oxadiazoles by the direct arylation of corresponding 3,4-diaryl-1,2,4-triazoles and 2-aryl-1,3,4-oxadiazoles with aryl iodides using PEG-400 as reaction medium. The procedure is experimentally simple and free from addition of external chelating ligands or co-catalysts.
已开发出无
配体的
铜催化方法,用于通过相应的3的直接芳基化反应合成3,4,5-三芳基-
1,2,4-三唑和2,5-二芳基-1,3,4-恶二唑使用P
EG-400作为反应介质的1,4-二芳基-
1,2,4-三唑和2-芳基-1,3,4-恶二唑与芳基
碘化物。该过程在实验上是简单的,并且没有添加外部螯合
配体或助催化剂。