Palladium-catalyzed oxidation of amine in air: an efficient approach to H-pyrazolo[5,1-a]-isoquinolines
                                
                                    
                                        作者:Jie Sheng、Ying Guo、Jie Wu                                    
                                    
                                        DOI:10.1016/j.tet.2013.05.066
                                    
                                    
                                        日期:2013.8
                                    
                                    An efficient approach to H-pyrazolo[5,1-a]isoquinolines through a reaction of N'-(2-alkynylbenzylidene) hydrazide with amine in the presence of a cooperative catalysis under mild conditions is reported. The palladium-catalyzed oxidation of amine in air leading to the formation of enamine is the key step during the transformation. (C) 2013 Elsevier Ltd. All rights reserved.