851886-25-4Relevant articles and documents
Design and Synthesis of Benzimidazoles As Novel Corticotropin-Releasing Factor 1 Receptor Antagonists
Mochizuki, Michiyo,Kori, Masakuni,Kobayashi, Katsumi,Yano, Takahiko,Sako, Yuu,Tanaka, Maiko,Kanzaki, Naoyuki,Gyorkos, Albert C.,Corrette, Christopher P.,Cho, Suk Young,Pratt, Scott A.,Aso, Kazuyoshi
, p. 2551 - 2566 (2016/04/10)
Benzazole derivatives with a flexible aryl group bonded through a one-atom linker as a new scaffold for a corticotropin-releasing factor 1 (CRF1) receptor antagonist were designed, synthesized, and evaluated. We expected that structural diversity could be expanded beyond that of reported CRF1 receptor antagonists. In a structure-activity relationship study, 4-chloro-N2-(4-chloro-2-methoxy-6-methylphenyl)-1-methyl-N7,N7-dipropyl-1H-benzimidazole-2,7-diamine 29g had the most potent binding activity against a human CRF1 receptor and the antagonistic activity (IC50 = 9.5 and 88 nM, respectively) without concerns regarding cytotoxicity at 30 μM. Potent CRF1 receptor-binding activity in brain in an ex vivo test and suppression of stress-induced activation of the hypothalamus-pituitary-adrenocortical (HPA) axis were also observed at 138 μmol/kg of compound 29g after oral administration in mice. Thus, the newly designed benzimidazole 29g showed in vivo CRF1 receptor antagonistic activity and good brain penetration, indicating that it is a promising lead for CRF1 receptor antagonist drug discovery research.
