Efficient Room‐Temperature Synthesis of Tri‐ and Tetrasubstituted Imidazoles Catalyzed by ZrCl<sub>4</sub>
作者:G. V. M. Sharma、Y. Jyothi、P. Sree Lakshmi
DOI:10.1080/00397910600773825
日期:2006.10
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