The acid-mediated ring opening/cyclisation reaction of N-benzyl-α-aryl-azetidinones
                                
                                    
                                        作者:Frank D. King、Stephen Caddick                                    
                                    
                                        DOI:10.1016/j.tet.2012.09.046
                                    
                                    
                                        日期:2012.11
                                    
                                    N-Benzyl-4-aryl-azetidinones undergo ring opening with triflic acid to form N-benzyl-cinnamamides, which either undergo cyclisation to give 5-aryl-benzazepin-3-ones or N-debenzylation to give cinnamamides. (C) 2012 Elsevier Ltd. All rights reserved.