Synthesis of Tetrasubstituted Unsymmetrical 1,4-Enediones via Copper-Promoted Autotandem Catalysis and Air As the Oxidant
                                
                                    
                                        作者:Yan Yang、Fan Ni、Wen-Ming Shu、Shang-Bo Yu、Meng Gao、An-Xin Wu                                    
                                    
                                        DOI:10.1021/jo400564f
                                    
                                    
                                        日期:2013.6.7
                                    
                                    An efficient procedure has been developed for the preparation of tetrasubstituted unsymmetrical 1,4-enediones via copper-promoted autotandem catalysis and air as the oxidant. Various N-nucleophiles are compatible with this reaction, such as morpholine, piperidine, pyrrolidine, arylamines, pyrazole, imidazole, benzimidazole, and benzotriazole. This reaction also has significant advantages in easily available substrates, atom economy, bond-forming efficiency, and environmental benignity.