Nucleoside analogues are currently used as antiviral agents, for instance against human immunodeficiency virus (HIV), or hepatitis B (HBV) and herpes viruses. In several cases, acyclic nucleosides appeared as an useful class of compounds for antiviral chemotherapy. 1 Indeed, the remarkable activity of acyclonucleosides such as acyclovir 1 2 and ganciclovir 2 3 which are potent antiherpetic agents shows the interest of this class of compounds. In these cases, the biological ...