Substituted aminopyrimidine protein kinase B (PknB) inhibitors show activity against Mycobacterium tuberculosis
作者:Timothy M. Chapman、Nathalie Bouloc、Roger S. Buxton、Jasveen Chugh、Kathryn E.A. Lougheed、Simon A. Osborne、Barbara Saxty、Stephen J. Smerdon、Debra L. Taylor、David Whalley
DOI:10.1016/j.bmcl.2012.02.107
日期:2012.5
A high-throughput screen against PknB, an essential serine-threonine protein kinase present in Mycobacterium tuberculosis (M. tuberculosis), allowed the identification of an aminoquinazoline inhibitor which was used as a starting point for SAR investigations. Although a significant improvement in enzyme affinity was achieved, the aminoquinazolines showed little or no cellular activity against M. tuberculosis. However, switching to an aminopyrimidine core scaffold and the introduction of a basic amine side chain afforded compounds with nanomolar enzyme binding affinity and micromolar minimum inhibitory concentrations against M. tuberculosis. Replacement of the pyrazole head group with pyridine then allowed equipotent compounds with improved selectivity against a human kinase panel to be obtained. (C) 2012 Elsevier Ltd. All rights reserved.