Catalytic Asymmetric Desymmetrization of <i>m</i><i>eso</i>-Diamide Derivatives through Enantioselective <i>N</i>-Allylation with a Chiral π-Allyl Pd Catalyst: Improvement and Reversal of the Enantioselectivity
                                
                                    
                                        作者:Osamu Kitagawa、Shinichi Matsuo、Kanako Yotsumoto、Takeo Taguchi                                    
                                    
                                        DOI:10.1021/jo052488y
                                    
                                    
                                        日期:2006.3.1
                                    
                                    [GRAPHICS]In the presence of the Trost ligands-Pd catalysts, N-monoallylation of bis(2,4,6-triisopropylbenzne)sulfonylamides derived from mesa-1,2-diamines proceeds with good to excellent enantioselectivity (85-96% ee) to give asymmetric desymmetrization products. Under the same conditions, in the reaction with meso-bistolunesulfonylamide derivatives, reversal of the enantioselectivity is observed.