Electrophilic intramolecular cyclization of functional derivatives of unsaturated compounds: V. Cyclization of anilides of styrylacetic acids in polyphosphoric acid
                                
                                    
                                        作者:R. I. Vas’kevich、A. I. Vas’kevich、I. Yu. Daniluk、M. V. Vovk                                    
                                    
                                        DOI:10.1134/s1070428013080137
                                    
                                    
                                        日期:2013.8
                                    
                                    Anilides of styrylacetic acids at heating in polyphosphoric acid undergo an intramolecular cyclization giving 1,5-diarylpyrrolidin-2-ones, 5-aryl-1,3,4,5-tetrahydro-2H-benzazepin-2-ones, and 5-(3-fluorophenyl) dihydrofuran-2(3H)-one, where the ratio of the products depends on the character of the aromatic substituents in the amide and styrene fragments of the substrate.