Copper-Catalyzed Direct Aryl Quaternization of <i>N</i>-Substituted Imidazoles to Form Imidazolium Salts
                                
                                    
                                        作者:Taiyong Lv、Zhi Wang、Jingsong You、Jingbo Lan、Ge Gao                                    
                                    
                                        DOI:10.1021/jo400527r
                                    
                                    
                                        日期:2013.6.7
                                    
                                    Diaryliodonium salts are employed to directly quaternize N-substituted imidazoles by using a copper catalyst to construct aryl imidazolium salts in moderate to excellent yields. This transformation is tolerant to a broad range of functional groups and provides a straightforward, efficient, and versatile route to synthesize aryl imidazolium as well as triazolium salts, especially the unsymmetric version.