The discovery of potent, orally bioavailable pyrazolo and triazolopyrimidine CXCR2 receptor antagonists
作者:David W. Porter、Michelle Bradley、Zarin Brown、Riccardo Canova、Steven Charlton、Brian Cox、Peter Hunt、David Kolarik、Sarah Lewis、Des O’Connor、John Reilly、Carsten Spanka、Lauren Tedaldi、Simon J. Watson、Roland Wermuth、Neil J. Press
DOI:10.1016/j.bmcl.2013.11.074
日期:2014.1
A hit-to-lead optimisation programme was carried out on the Novartis archive screening hit, pyrazolopyrimidine 2-methyl-5-((phenylthio)methyl)pyrazolo[1,5-a]pyrimidin-7-ol 1, resulting in the discovery of CXCR2 receptor antagonist 2-benzyl-5-(((2,3-difluorophenyl)thio)methyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol 14. The SAR was investigated by systematic variation of the pendant thiol, alkyl and pyrimidinol groups. Replacement of the pyrazolopyrimidine core with a triazolo alternative led to a dual series of antagonists with favourable biological and pharmacokinetic properties. (C) 2013 Elsevier Ltd. All rights reserved.