Lanthanide- and DMSO-Induced Ring Opening of 2-Iminooxetanes: Synthesis of .beta.-Lactams and .beta.-Keto Amides
                                
                                    
                                        作者:Gaetano Barbaro、Arturo Battaglia、Patrizia Giorgianni                                    
                                    
                                        DOI:10.1021/jo00109a038
                                    
                                    
                                        日期:1995.2
                                    
                                    2-Iminooxetanes (1), generated by lanthanide-catalyzed heterocycloaddition of aldehydes to ketene imines, are versatile synthons for beta-lactams (2) and for beta-keto amides (3). Conversion of 1 into 2 and 3 can be accomplished by either lanthanide-induced or oxidative (DMSO) ring opening, respectively.