Synthesis of chiral γ -sultams through intramolecular reductive amination with sulfonylcarbamate as N- source
                                
                                    
                                        作者:Bo Song、Yue Ji、Shu-Bo Hu、Chang-Bin Yu、Yong-Gui Zhou                                    
                                    
                                        DOI:10.1016/j.tetlet.2017.03.012
                                    
                                    
                                        日期:2017.4
                                    
                                    An efficient and enantioselective palladium-catalyzed intramolecular asymmetric reductive amination with sulfonylcarbamates as N-sources was reported, providing a facile and general access to the chiral gamma-sultam derivatives with up to 97% of enantioselectivity. This tandem process avoids additional deprotection manipulation and arduous isolation of the N-sulfonyl-imine intermediates. (C) 2017 Elsevier Ltd. All rights reserved.