Highly regioselective C H bond functionalization of imidazo[1,2-a]pyridines with aryl halides catalyzed by Ru-arene complex
                                
                                    
                                        作者:Hai Yang、Liping Yang、Yuan Li、Fan Zhang、Huajie Liu、Bing Yi                                    
                                    
                                        DOI:10.1016/j.catcom.2012.04.032
                                    
                                    
                                        日期:2012.9
                                    
                                    An effective Ru-catalyzed coupling reaction of imidazo[1,2-a]pyridines and aryl halides is reported for the synthesis of polysubstituted imidazo[1,2-a]pyridines through C-H bond cleavages. The current study presents a convenient strategy to synthesize polysubstituted imidazo[1,2-a]pyridine, a common structural motif in natural products and pharmaceuticals. Desired products in considerable yields can be obtained in the presences of [RuCl2(P-cymene)](2) and Cs2CO3 in DMF at 120 degrees C after 15 h. (C) 2012 Elsevier B.V. All rights reserved.