Synthesis and Antiviral Evaluation of Novel Cyclopropyl Nucleosides, Phosphonate Nucleosides and Phosphonic Acid Nucleosides

Synthesis of novel difluoro-cyclopropyl guanine nucleosides and their phosphonate analogues as potent antiviral agents

The synthesis of new rigid guanine analogues with anti-HIV-1 and anti-herpes viral activities is described. The phosphonate of difluorocyclopropane nucleoside analogue 26 exhibits in vitro anti-HIV-1 activity similar to that of PMEA in MT-4 cells. Further, analogue 20 shows moderate anti-HCMV activity in MRC cells.

Synthesis and antiviral activity evaluation of acyclic 2'-azanucleosides bearing a phosphonomethoxy function in the side chain

Acyclic 2′-azanucleosides with a phosphonomethoxy function in the side chain were obtained by coupling of diethyl {2-[N-(pivaloyloxymethyl)-N-(p-toluenesulfonyl)amino]ethoxymethyl}phosphonate with the pyrimidine nucleobases via the Vorbrüggen-type protocol. The compounds were evaluated in vitro for activity against a broad variety of RNA and DNA viruses.

Synthesis and antiviral activity of C-fluoro-branched cyclopropyl nucleosides

A series of novel fluorocyclopropyl nucleosides were synthesized starting from acetol using the Simmons-Smith reaction as a key reaction. All the nucleosides synthesized were assayed against several viruses. Among the compounds synthesized, the uracil analogue 22 showed moderate anti-HCMV activity (10.61 microg/mL, in AD-169).