Since 2'-fluoro-5-methyl-β-l-arabinofuranosyluracil (l-FMAU) has been shown to be a potent anti-HBV agent in vitro, it was of interest to study the structure-activity relationships of related nucleosides. Thus, a series of 1-(2-deoxy-2-fluoro-β-l-arabinofuranosyl) pyrimidine nucleosides have been synthesized and evaluated for antiviral activity against HBV in 2.2. 15 cells. For this study, l-ribose was initially used as the starting material. Due to the ...