Tetrapyrroles. III. Homochiral dihydropyrromethenones from N-Aminopyrroles and acetylenic acids
                                
                                    
                                        作者:Peter A. Jacobi、S. Rajeswari                                    
                                    
                                        DOI:10.1016/s0040-4039(00)60940-1
                                    
                                    
                                        日期:1992.10
                                    
                                    Dihydropyrromethenone 29, a potential precursor for the synthesis of Phytochrome (8), Phycocyanin (9)and Phycoerythrin (10), has been prepared in homochiral form from pyrrolohydrazide 27 by a sequence involving F- induced 5-exo-dig cyclization to afford enamide 28, followed by photochemical 3,5-sigmatropic rearrangement.