An efficient and novel electrochemical oxidative tandem cyclization of arylketones and benzylamines for the synthesis of 1,2,4-trisubstituted-(1H)-imidazoles has been developed under metal- and oxidant-free conditions. This direct C-N bond formation strategy, with a broad functional group tolerance, affords the desired imidazoles in moderate to excellent yields.
synthetic strategy for the construction of substitutedimidazoles from acetophenones and benzylamines via N-heterocyclic carbene (NHC) - catalysis was reported. This reaction can be performed under solvent-free condition without pre-functionalization of substrates. Various substituted acetophenones and benzylamines were converted to its corresponding imidazoles with good to excellent yields.
A practical synthetic method for polysubstituted imidazoles via iodine‐catalyzedaerobicoxidativecyclization of aryl ketones and benzylamines has been developed. It was found to tolerate a broad range of substrates to prepare polysubstituted imidazole derivatives in a one‐pot manner, and thus importantly allowed product diversity for imidazole chemistry. Additionally, the resultant 1,2,4‐trisubstituted
I<sub>2</sub>-catalyzed synthesis of substituted imidazoles from vinyl azides and benzylamines
作者:Likui Xiang、Yanning Niu、Xiaobo Pang、Xiaodong Yang、Rulong Yan
DOI:10.1039/c5cc01155h
日期:——
A novel and efficient I2-catalyzed oxidative tandem cyclization of simple vinyl azides and benzylamines has been developed for the synthesis of substituted imidazoles.
A novel and practical method for the construction of 1,2,4-trisubstituted imidazoles with enamides and benzylamines catalysed by CuBr and I2 has been developed. This sustainable, simple and environmentally-friendly procedure tolerates various functional groups and affords a series of trisubstitued imidazoles.