Sequential 1,4- and 1,2-Addition Reactions to α,β-Unsaturated <i>N</i>-Acyliminium Ions: A New Strategy for the Synthesis of Spiro and Bridged Heterocycles
                                
                                    
                                        作者:Arife Yazici、Stephen G. Pyne                                    
                                    
                                        DOI:10.1021/ol4029513
                                    
                                    
                                        日期:2013.11.15
                                    
                                    Novel bicyclic and tetracyclic spirocycles and tricyclic bridged heterocyclic systems can be readily prepared from sequential 1,4- and 1,2-addition reactions of latent bis-nucleophiles to alpha,beta-unsaturated N-acyliminium ions.