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Various 3'-azido analogues of pyrimidine deoxyribonucleosides have been synthesized and tested against human immunodeficiency virus (HIV-1, HTLV-III/LAV) in human peripheral blood mononuclear cells. Among these compounds, the 3'-azido analogues of thymidine (2), 3-(3-oxo-1-propenyl)thymidine (21), 2'-deoxyuridine (1), 2'-deoxy-5-bromouridine(5), 2'-deoxy-5-fluorocytidine (19), 2'-deoxy-5-iodouridine (6), 2'-deoxycytidine (18), 2'-deoxy-5-fluorouridine (4), 2'-deoxy-5-thiocyoanatouridine (16), 2'-deoxy-5-methylcytidine (20), 2'-deoxy-5-aminouridine (7), and 2'-deoxy-5-hydroxyuridine (10) were found to have significant antiviral activity, with EC50 values of 0.002, 0.01, 0.2, 1.0, 1.0, 1.1, 1.2, 4.8, 5.1, 5.1, 6.2, and 10 microM, respectively. The structure-activity relationships are discussed.

No abstract

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