An improved synthesis of α-AZA, α-AZP and α-AZG, the precursors to clinical markers of tissue hypoxia
                                
                                    
                                        作者:Piyush Kumar、Leonard I Wiebe、Elena Atrazheva、Manju Tandon                                    
                                    
                                        DOI:10.1016/s0040-4039(01)00099-5
                                    
                                    
                                        日期:2001.3
                                    
                                    alpha-[I-123]-IAZA and alpha-[I-123]-IAZP are experimental diagnostic radiopharmaceuticals which have been used clinically to diagnose hypoxia in a number of pathologies, including cancer, peripheral vascular disease, rheumatoid arthritis and brain trauma. These nitroimidazole nucleosides are synthesized from the non-iodinated nucleosides AZA, AZP and AZG, respectively. Earlier methods report low chemical yields for the synthesis of these precursors. The modified procedures now reported provide nearly quantitative yields of these compounds, thereby substantially reducing the cost and effort of synthesis. (C) 2001 Elsevier Science Ltd. All rights reserved.