S<sub>N</sub>Ar Iodination of 6-Chloropurine Nucleosides:  Aromatic Finkelstein Reactions at Temperatures Below −40 °C<sup>1</sup>
                                
                                    
                                        作者:Jiangqiong Liu、Zlatko Janeba、Morris J. Robins                                    
                                    
                                        DOI:10.1021/ol048987n
                                    
                                    
                                        日期:2004.8.1
                                    
                                    Mesitoyl or toluoyl esters of inosine and 2'-deoxyinosine were deoxychlorinated at C6 to give the crystalline 6-chloropurine nucleoside derivatives, which underwent quantitative conversion to the 6-iodo analogues with Nal/TFA/butanone at -50 to -40 degreesC. The 6-iodo compounds were efficient substrates for SNAr, Sonogashira, and Suzuki-Miyaura reactions, in contrast with the 6-chloro analogues, and gave good to high yields of C-N and C-C coupled products.