Reverse Cope elimination reactions. 1. Mechanism and scope
                                
                                    
                                        作者:Engelbert Ciganek、John M. Read、Joseph C. Calabrese                                    
                                    
                                        DOI:10.1021/jo00123a013
                                    
                                    
                                        日期:1995.9
                                    
                                    N-4-Pentenyl- and N-5-hexenyl-N-methylhydroxylamine cyclized under mild conditions in a reverse Cope elimination reaction to give 1,2-dimethylpyrrolidine N-oxide and 1,2-dimethylpiperidine N-oxide, respectively. The reaction was shown to be concerted and thermodynamically controlled. The scope of this novel cyclization is discussed, and comparisons are made with the closely related and previously reported cyclization of monosubstituted alkenylhydroxylamines to give cyclic hydroxylamines.