Isosteric replacements for benzothiazoles and optimisation to potent Cathepsin K inhibitors free from hERG channel inhibition
作者:Alexander G. Dossetter、Jonathan Bowyer、Calum R. Cook、James J. Crawford、Jonathan E. Finlayson、Nicola M. Heron、Christine Heyes、Adrian J. Highton、Julian A. Hudson、Anja Jestel、Stephan Krapp、Philip A. MacFaul、Thomas M. McGuire、Andrew D. Morley、Jeffrey J. Morris、Ken M. Page、Lyn Rosenbrier Ribeiro、Helen Sawney、Stefan Steinbacher、Caroline Smith
DOI:10.1016/j.bmcl.2012.07.012
日期:2012.9
The discovery of nitrile compound 4, a potent inhibitor of Cathepsin K (Cat K) with good bioavailability in dog is described. The compound was used to demonstrate target engagement and inhibition of Cat K in an in vivo dog PD model. The margin to hERG ion channel inhibition was deemed too low for a clinical candidate and an optimisation program to find isosteres or substitutions on benzothiazole group led to the discovery of 20, 24 and 27; all three free from hERG inhibition. (C) 2012 Elsevier Ltd. All rights reserved.