Novel HCV NS5B polymerase inhibitors derived from 4-(1',1'-dioxo-1',4'-dihydro-1'lambda(6)-benzo[1',2',4']thiadiazin-3'-yl)-5-hydroxy-2H-pyridazin-3-ones. Part 3: Further optimization of the 2-, 6-, and 7'-substituents and initial pharmacokinetic assessments.
Li, L.S., Zhou, Y., Murphy, D.E., Stankovic, N., Zhao, J., Dragovich, P.S., Bertolini, T., Sun, Z., Ayida, B., Tran, C.V., Ruebsam, F., Webber, S.E., Shah, A.M., Tsan, M., Showalter, R.E., Patel, R., Lebrun, L.A., Bartkowski, D.M., Nolan, T.G., Norris, D.A., Kamran, R., Brooks, J., Sergeeva, M.V., Kirkovsky, L., Zhao, Q., Kissinger, C.R.(2008) Bioorg Med Chem Lett 18: 3446-3455
- PubMed: 18457949 
- DOI: https://doi.org/10.1016/j.bmcl.2008.02.072
- Primary Citation of Related Structures:  
3CDE - PubMed Abstract: 
5-Hydroxy-3(2H)-pyridazinone derivatives were investigated as inhibitors of genotype 1 HCV NS5B polymerase. Lead optimization led to the discovery of compound 3a, which displayed potent inhibitory activities in biochemical and replicon assays [IC(50) (1b)<10nM; IC(50) (1a)=22 nM; EC(50) (1b)=5nM], good stability toward human liver microsomes (HLM t(1/2)>60 min), and high ratios of liver to plasma concentrations 12h after a single oral administration to rats.
Organizational Affiliation: 
Anadys Pharmaceuticals, Inc., 3115 Merryfield Row, San Diego, CA 92121, USA.