5-Halo-6-alkoxy-5,6-dihydro derivatives of azidothymidine (AZT) and et
hyldeoxyuridine (EDU) were developed and evaluated using in vitro and
in vivo models. Although most of these 5,6-dihydro derivatives served
as prodrugs in improving site-specific delivery and pharmacokinetic pa
rameters, some unique characteristics were exhibited.