C-3 halo and 3-methyl substituted 5'-nor-3-deazaaristeromycins: synthesis and antiviral properties.

To expand on the antiviral properties of 5'-noraristeromycin, synthetic entry into 3-substituted 3-deaza-5'-noraristeromyin derivatives (i.e., bromo, 4; iodo, 5; chloro, 6; and, methyl, 7) has been accomplished from a common intermediate. An extensive antiviral analysis showed 7 to be basically inactive (except for weak effects against VSV) and there were no general trends among the halo compounds (except versus reovirus-1 and influenza B). Individually, compound 4 was most favorable towards HCMV, VZV, HBV, and VV; product 5 against HBV, VSV, VV, influenza B, HCMV, and measles; and, target 6 towards Punta Toro, VSV, measles, parainflucenza-3, influenza A (H5N1), and influenza B. The methyl target 7 was inactive in all viral assays.