On the Mechanism of the Palladium-Catalyzed <i>tert</i>-Butylhydroperoxide-Mediated Wacker-Type Oxidation of Alkenes Using Quinoline-2-Oxazoline Ligands
                                
                                    
                                        作者:Brian W. Michel、Laura D. Steffens、Matthew S. Sigman                                    
                                    
                                        DOI:10.1021/ja2017043
                                    
                                    
                                        日期:2011.6.1
                                    
                                    The mechanism of the tert-butylhydroperoxide-mediated, Pd(Quinox)-catalyzed Wacker-type oxidation was investigated to evaluate the hypothesis that a selective catalyst-controlled oxidation could be achieved by rendering the palladium coordinatively saturated using a bidentate amine ligand. The unique role of the Quinox ligand framework was probed via systematic ligand modifications. The modified ligands were evaluated through quantitative Hammett analysis, which supports a "push-pull" relationship between the electronically asymmetric quinoline and oxazoline ligand modules.