A simple two-step access to diversely substituted imidazo[4,5-b]pyridines and benzimidazoles from readily available 2-imidazolines
                                
                                    
                                        作者:Prashant Mujumdar、Tanja Grkovic、Mikhail Krasavin                                    
                                    
                                        DOI:10.1016/j.tetlet.2013.04.036
                                    
                                    
                                        日期:2013.6
                                    
                                    We discovered a facile rearrangement of N-(hetero)aryl 2-imidazolines into diversely substituted imidazo[4,5-b]pyridines and benzimidazoles, under Bechamp reduction conditions. Combined with the earlier reported protocol for Pd-catalyzed (hetero)arylation of 2-imidazolines, it provides a simple two-step access to a range of compounds based on these medicinally important heterocyclic cores. (C) 2013 Elsevier Ltd. All rights reserved.