Hit-to-lead investigation of a series of novel combined dopamine D2 and muscarinic M1 receptor ligands with putative antipsychotic and pro-cognitive potential
作者:Anette Graven Sams、Krestian Larsen、Gitte Kobberøe Mikkelsen、Morten Hentzer、Claus Tornby Christoffersen、Klaus Gjervig Jensen、Kristen Frederiksen、Benny Bang-Andersen
DOI:10.1016/j.bmcl.2012.05.048
日期:2012.8
We describe the discovery of a series of compounds based on 1-3-[4-(2-oxo-2,3-dihydro-benzoimidazol-1-yl)-piperidin-1-yl]-propyl}-3,4-dihydro-1H-quinolin-2-one (3), showing combined D-2 receptor affinity and M-1 receptor agonism. Based on a strategy of controlling log P, we herein describe a hit-to-lead investigation with the aim of retaining the combined D-2/M-1 profile, while removing the propensity of the compounds to inhibit the hERG channel, as well as at obtaining acceptable pharmacokinetic properties. Although a SAR was evident for all four parameters in question, it was not possible to separate hERG channel inhibition and D-2 receptor affinity by this effort; whilst it was feasible to obtain compounds with M-1 receptor agonism, acceptable clearance, and weak hERG inhibition. (C) 2012 Elsevier Ltd. All rights reserved.