SnCl4 versus TiCl4-mediated coupling between N-6-benzoyladenine and perbenzoylated 2-deoxypyranose: Application to the synthesis of certain homochiral acyclo and carboacyclonucleosides

Article abstract of DOI:10.1016/S0040-4020(01)96048-X

1,3,4-tri-O-benzoyl 2-deoxyribopyranose and persilylated N-6-benzoyladenine react in two different and regioselective ways according to the nature of the coupling reagent SnCl₄ or TiCl₄. The former Lewis acid gives rise to the anomer