Novel HCV NS5B polymerase inhibitors derived from 4-(1′,1′-dioxo-1′,4′-dihydro-1′λ6-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
作者:Lian-Sheng Li、Yuefen Zhou、Douglas E. Murphy、Nebojsa Stankovic、Jingjing Zhao、Peter S. Dragovich、Thomas Bertolini、Zhongxiang Sun、Benjamin Ayida、Chinh V. Tran、Frank Ruebsam、Stephen E. Webber、Amit M. Shah、Mei Tsan、Richard E. Showalter、Rupal Patel、Laurie A. LeBrun、Darian M. Bartkowski、Thomas G. Nolan、Daniel A. Norris、Ruhi Kamran、Jennifer Brooks、Maria V. Sergeeva、Leo Kirkovsky、Qiang Zhao、Charles R. Kissinger
DOI:10.1016/j.bmcl.2008.02.072
日期:2008.6
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 [IC50 (1b) < 10 nM; IC50 (1a) = 22 nM; EC50 (1b) = 5 nM], good stability toward human liver microsomes (HLM t(1/2) > 60 min), and high ratios of liver to plasma concentrations 12 h after a single oral administration to rats. (c) 2008 Published by Elsevier Ltd.