Mild and Efficient Functionalization at C6 of Purine 2‘-Deoxynucleosides and Ribonucleosides<sup>1</sup>
作者:Xiaoyu Lin、Morris J. Robins
DOI:10.1021/ol000255h
日期:2000.11.1
[reaction: see text] Treatment of sugar-protected inosine and 2'-deoxyinosine derivatives with a cyclic secondary amine or imidazole and I(2)/Ph(3)P/EtN(i-Pr)(2)/(CH(2)Cl(2) or toluene) gave quantitative conversions into 6-N-(substituted)purine nucleosides. S(N)Ar reactions with 6-(imidazol-1-yl) derivatives gave 6-(N, O, or S)-substituted products. The 6-(benzylsulfonyl) group underwent S(N)Ar displacement