Anti-Varicella—Zoster Virus Bicyclic Nucleosides: Replacement of Furo by Pyrro Base Reduces Antiviral Potency

We have recently reported the discovery of an entirely new category of potent antiviral agents based on novel deoxynucleoside analogues with unusual fluorescent bicyclic furo base moieties. To probe structure-activity relationships and to seek to optimize the properties of the lead compounds, we prepared pyrro analogues of the furo systems. We herein report the synthesis, characterization and antiviral evaluation of these novel compounds.