940940-77-2Relevant academic research and scientific papers
1,4-Dihydroindeno[1,2-c]pyrazoles with acetylenic side chains as novel and potent multitargeted receptor tyrosine kinase inhibitors with low affinity for the hERG ion channel
Dinges, Jürgen,Albert, Daniel H.,Arnold, Lee D.,Ashworth, Kimba L.,Akritopoulou-Zanze, Irini,Bousquet, Peter F.,Bouska, Jennifer J.,Cunha, George A.,Davidsen, Steven K.,Diaz, Gilbert J.,Djuric, Stevan W.,Gasiecki, Alan F.,Gintant, Gary A.,Gracias, Vijaya J.,Harris, Christopher M.,Houseman, Kathryn A.,Hutchins, Charles W.,Johnson, Eric F.,Li, Hu,Marcotte, Patrick A.,Martin, Ruth L.,Michaelides, Michael R.,Nyein, Michelle,Sowin, Thomas J.,Su, Zhi,Tapang, Paul H.,Xia, Zhiren,Zhang, Henry Q.
, p. 2011 - 2029 (2008/02/04)
The synthesis of a novel series of 1,4-dihydroindeno[1,2-c]pyrazoles with acetylene-type side chains is described. Optimization of those compounds as KDR kinase inhibitors identified 8, which displayed an oral activity in an estradiol-induced murine uterine edema model (ED50 = 3 mg/kg) superior to Sutent (ED50 = 9 mg/kg) and showed potent antitumor efficacy in an MX-1 human breast carcinoma xenograft tumor growth model (tumor growth inhibition = 90% at 25 mg/kg·day po). The compound was docked into a homology model of the homo-tetrameric pore domain of the hERG potassium channel to identify strategies to improve its cardiac safety profile. Systematic interruption of key binding interactions between 8 and Phe656, Tyr652, and Ser624 yielded 90, which only showed an IC50 of 11.6 μM in the hERG patch clamp assay. The selectivity profile for 8 and 90 revealed that both compounds are multitargeted receptor tyrosine kinase inhibitors with low nanomolar potencies against the members of the VEGFR and PDGFR kinase subfamilies.
