Discovery of 2-(4-Pyridin-2-ylpiperazin-1-ylmethyl)-1<i>H</i>-benzimidazole (ABT-724), a Dopaminergic Agent with a Novel Mode of Action for the Potential Treatment of Erectile Dysfunction
作者:Marlon Cowart、Steven P. Latshaw、Pramila Bhatia、Jerome F. Daanen、Jeffrey Rohde、Sherry L. Nelson、Meena Patel、Teodozyi Kolasa、Masaki Nakane、Marie E. Uchic、Loan N. Miller、Marc A. Terranova、Renjie Chang、Diana L. Donnelly-Roberts、Marian T. Namovic、Peter R. Hollingsworth、Brenda R. Martino、James J. Lynch、James P. Sullivan、Gin C. Hsieh、Robert B. Moreland、Jorge D. Brioni、Andrew O. Stewart
DOI:10.1021/jm030505a
日期:2004.7.1
A new class of agents with potential utility for the treatment of erectile dysfunction has been discovered, guided by the hypothesis that selective D-4 agonists are erectogenic but devoid of the side effects typically associated with dopaminergic agents. The lead agent 2-(4-pyridin-2-ylpiperazin-1-ylmethyl)-1H-benzimidazole (1, ABT-724) was discovered by optimization of a series of benzimidazole arylpiperazines. This highly selective D-4 agonist was found to be very potent and efficacious in vivo, eliciting penile erections in rats at a dose of 0.03 mumol/kg, with a positive response rate of 77% erectile incidence. Even at high doses, it was devoid of side effects in animal models of central nervous system behaviors, emesis, or nausea. The structure-activity relationship of the parent benzimidazole series leading to 1 is described, with the detailed in vitro and in vivo profiles described. Distinctive structural features were discovered that are associated with D-4 selective agonism in this series of analogues.