The invention is directed to pyridazinone compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus.
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.
WO2008/82725
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Efficient synthesis of 2,6-disubstituted-5-hydroxy-3-oxo-2,3-dihydro-pyridazine-4-carboxylic acid ethyl esters
作者:Douglas E. Murphy、Peter S. Dragovich、Benjamin K. Ayida、Thomas M. Bertolini、Lian-Sheng Li、Frank Ruebsam、Nebojsa S. Stankovic、Zhongxiang Sun、Jingjing Zhao、Yuefen Zhou
DOI:10.1016/j.tetlet.2007.11.187
日期:2008.1
boxylic acidethylesters (6-substituted-5-hydroxy-3(2H)-pyridazinone-4-carboxylic acidethylesters). These compounds are shown to undergo selective alkylation at the 2-position in moderate to good yields (19–77%) to afford 2,6-disubstituted-5-hydroxy-3-oxo-2,3-dihydro-pyridazine-4-carboxylic acidethylesters (2,6-disubstituted-5-hydroxy-3(2H)-pyridazinone-4-carboxylic acidethylesters).