Discovery of novel benzimidazoles as potent inhibitors of TIE-2 and VEGFR-2 tyrosine kinase receptors
We herein disclose a novel chemical series of benzimidazole-ureas as inhibitors of VEGFR-2 and TIE-2 kinase receptors, both of which are implicated in angiogenesis. Structure-activity relationship (SAR) studies elucidated a critical role for the N1 nitrogen of both the benzimidazole (segment E) and urea (segment B) moieties. The SAR results were also supported by the X-ray crystallographic elucidation of the role of the N1 nitrogen and the urea moiety when the benzimidazole-urea compounds were bound to the VEGFR-2 enzyme. The left side phenyl ring (segment A) occupies the backpocket where a 3-hydrophobic substituent was favored for TIE-2 activity.
Hasegawa, Masaichi,Nishigaki, Naohiko,Washio, Yoshiaki,Kano, Kazuya,Harris, Philip A.,Sato, Hideyuki,Mori, Ichiro,West, Rob I.,Shibahara, Megumi,Toyoda, Hiroko,Wang, Liping,Nolte, Robert T.,Veal, James M.,Cheung, Mui
p. 4453 - 4470
(2008/02/13)
Chemical compounds
Benzimidazole derivatives, which are useful as TIE-2 and/or VEGFR2 inhibitors are described herein. The described invention also includes methods of making such benzimidazole derivatives as well as methods of using the same in the treatment of hyperproliferative diseases.
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(2008/06/13)
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