title: Structure-activity relationship studies on anti-HCV activity of ring-expanded ('fat') nucleobase analogues containing the imidazo[4,5-e][1,3]diazepine-4,8-dione ring system.
abstract: In continuation of our structure-activity relationship studies on anti-HCV activity of the title imidazo[4,5-e][1,3]diazepine ring system, we report here the synthesis and effect on biological activity of introducing hydrophobic substituents at the 2-position of the heterocycle. Our results suggest that there is no particular advantage to that end as the observed antiviral activity of the test compounds was lower than that of the unmodified 2-bromo derivative used for comparison. The activity/toxicity profile of all target compounds, however, was still better than that of the reference compound ribavirin used in the antiviral assay, but not as good as that of interferon-alpha, the other reference compound used in the assay.
authors.affiliation: Laboratory for Drug Design & Synthesis, Department of Chemistry & Biochemistry, University of Maryland-Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Ning
authors.initials: N
authors.lastname: Zhang
authors.forename: Brent E
authors.initials: BE
authors.lastname: Korba
authors.forename: Ramachandra S
authors.initials: RS
authors.lastname: Hosmane
mesh_terms: D000998:Antiviral Agents / Q000737:chemistry* / Q000494:pharmacology; D001381:Azepines / Q000737:chemistry* / Q000494:pharmacology; D002460:Cell Line; D016174:Hepacivirus / Q000187:drug effects*; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D016898:Interferon-alpha / Q000592:standards; D008826:Microbial Sensitivity Tests; D012367:RNA, Viral / Q000032:analysis; D012254:Ribavirin / Q000592:standards; D013329:Structure-Activity Relationship
chemical_list: D000998:Antiviral Agents; D001381:Azepines; D016898:Interferon-alpha; D012367:RNA, Viral; D012254:Ribavirin