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
Elemental Sulfur-Promoted Aerobic Cyclization of Ketones and Aliphatic Amines for Synthesis of Tetrasubstituted Imidazoles
作者:Xiangui Chen、Zhen Wang、Huawen Huang、Guo-Jun Deng
DOI:10.1002/adsc.201800765
日期:2018.10.18
Elementalsulfur‐promoted cyclization for the one‐pot synthesis of tetra‐substituted imidazoles from benzylamines and ketones is described. Elementalsulfur combined with molecular oxygen as the benign co‐oxidant was found to be the key for the high efficiency of this transformation under metal‐free conditions. A range of tetrasubstituted imidazoles were synthesizedfrom simple ketones and amines with