Reaction of 3-Iodochromone with Nucleophiles 3. Formation of 2-Aminomethylene-3(2H)-benzofuranones by the Reaction with Secondary Amines
                                
                                    
                                        作者:Yoshiaki Sugita、Takako Iwaki、Misaki Okamoto、Ichiro Yokoe                                    
                                    
                                        DOI:10.3987/com-01-9169
                                    
                                    
                                        日期:——
                                    
                                    3-Iodochromone (4a) easily reacted with secondary amines in the presence of potassium carbonate to give 2-aminomethylene-3(2H)-benzofuranones in good yields. Under similar conditions without potassium carbonate, 4a was reacted with piperidine to give the enamino ketone (5) as the major product.