The invention relates to compounds of the formula I
or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3 and R4 are as defined herein. The invention also relates to pharmaceutical compositions containing the compounds of formula I and to methods of treating hyperproliferative disorders in a mammal by administering the compounds of formula I.
Lessons from (<i>S</i>)-6-(1-(6-(1-Methyl-1<i>H</i>-pyrazol-4-yl)-[1,2,4]triazolo[4,3-<i>b</i>]pyridazin-3-yl)ethyl)quinoline (PF-04254644), an Inhibitor of Receptor Tyrosine Kinase c-Met with High Protein Kinase Selectivity but Broad Phosphodiesterase Family Inhibition Leading to Myocardial Degeneration in Rats
The hepatocyte growth factor (HGF)/c-Met signaling axis is deregulated in many cancers and plays important roles in tumor invasive growth and metastasis. An exclusively selective c-Met inhibitor (S)-6-(1-(6-(1-methyl-1H-pyrazol -4-yl) - [1,2,4] triazolo [4,3-b pyridazin- 3-yl) ethyl) quinoline (8) was discovered from a highly selective high-throughput screening hit. via structure-based drug design and medicinal chemistry lead optimization. Compound 8 had many attractive properties meriting preclinical evaluation. Broad off-target screens identified 8 as a pan-phosphodiesterase (PDE) family inhibitor, which was implicated in a sustained increase in heart rate, increased cardiac output, and decreased contractility indices, as well as myocardial degeneration in in vivo safety evaluations in rats. Compound 8 was terminated as a preclinical candidate because of a narrow therapeutic window in cardio-related safety. The learning from multiparameter lead optimization and strategies to avoid the toxicity attrition at the late stage of drug discovery are discussed.
TRIAZOLOPYRAZINE DERIVATIVES USEFUL AS ANTI-CANCER AGENTS
申请人:Pfizer Products Inc.
公开号:EP2018383B1
公开(公告)日:2011-11-09
US7732604B2
申请人:——
公开号:US7732604B2
公开(公告)日:2010-06-08
[EN] TRIAZOLOPYRAZINE DERIVATIVES USEFUL AS ANTI-CANCER AGENTS<br/>[FR] DÉRIVÉS DE TRIAZOLOPYRAZINE UTILES EN TANT QU'AGENTS ANTI-CANCEREUX
申请人:PFIZER PROD INC
公开号:WO2007132308A1
公开(公告)日:2007-11-22
[EN] The invention relates to compounds of the formula (I) or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3 and R4 are as defined herein. The invention also relates to pharmaceutical compositions containing the compounds of formula I and to methods of treating hyperproliferative disorders in a mammal by administering the compounds of formula (I). [FR] Cette invention concerne des composés de formule (I) ou un sel de celle-ci pharmaceutiquement acceptable où R1, R2, R3 et R4 sont tels que définis dans la description. L'invention concerne également les composés pharmaceutiques contenant les composés de formule I ainsi que les méthodes de traitement des désordres hyperprolifératifs chez les mammifères en administrant des composés de formule (I).