Facile Synthesis of a “Ready to Use” Precursor of Porphobilinogen and Its Amino Acid Derivatives
                                
                                    
                                        作者:Carole Pissot Soldermann、Ramakrishnan Vallinayagam、Manuel Tzouros、Reinhard Neier                                    
                                    
                                        DOI:10.1021/jo702319n
                                    
                                    
                                        日期:2008.1.1
                                    
                                    [GRAPHICS]A practical synthesis of porphobilinogen based on the biosynthetic mechanism is described. The crossed Mukayiama. aldol reaction is the key step creating the central carbon-carbon bond between the two protected forms of 5-aminolevulinic acids. The optimized sequence gives a crystalline, storable precursor, which can be transformed in high yield into porphobilinogen and bioconjugates thereof. The enzymatic hydrolysis of the precursor produces porphobilinogen in quantitative yield.