The design of a novel series of muscarinic receptor antagonists leading to AZD8683, a potential inhaled treatment for COPD
作者:Antonio Mete、Keith Bowers、Richard J. Bull、Helen Coope、David K. Donald、Katherine J. Escott、Rhonan Ford、Ken Grime、Andrew Mather、Nicholas C. Ray、Vince Russell
DOI:10.1016/j.bmcl.2013.09.092
日期:2013.12
A novel series of muscarinic receptor antagonists was developed, with the aim of identifying a compound with high M-3 receptor potency and a reduced risk of dose-limiting side effects with potential for the treatment of COPD.Initial compound modifications led to a novel cycloheptyl series, which was improved by focusing on a quinuclidine sub-series. A wide range of N-substituents was evaluated to determine the optimal substituent providing a high M-3 receptor potency, high intrinsic clearance and high human plasma protein binding. Compounds achieving in vitro study criteria were selected for in vivo evaluation. Pharmacokinetic half-lives, inhibition of bronchoconstriction and duration of action, as well as systemic side effects, induced by the compounds were assessed in guinea-pig models.Compounds with a long duration of action and good therapeutic index were identified and AZD8683 was selected for progression to the clinic. (C) 2013 Elsevier Ltd. All rights reserved.