Some new 3'-azido, 2',3'-unsaturated and 2',3'-dideoxy 5-styryl analogs of deoxyuridine-related compounds have been synthesized and evaluated against human immunodeficiency virus in vitro. Among these compounds, 3'-azido-2',3'-dideoxy-5-E-styryluridine (6) and 2',3'-dideoxy-E-5-styryluridine (9) were found to be active, with ED50 values of 5 and 10-mu-g/ml respectively.