Identification and structure-guided optimization of a series of 4-(pyrazol-4-yl)-pyrimidines as selective CDK 4/6 inhibitors is reported herein. Several potency and selectivity determinants were established based on the X-ray crystallographic analysis of representative compounds bound to monomeric CDK 6. Significant selectivity for CDK4/6 over CDK 1 and CDK2 was demonstrated with several compounds in both enzymatic and cellular assays.
Potent bicyclic inhibitors of malarial cGMP-dependent protein kinase: approaches to combining improvements in cell potency, selectivity and structural novelty
作者:Jonathan M. Large、Kristian Birchall、Nathalie S. Bouloc、Andy T. Merritt、Ela Smiljanic-Hurley、Denise J. Tsagris、Mary C. Wheldon、Keith H. Ansell、Peter J. Coombs、Catherine A. Kettleborough、David Whalley、Lindsay B. Stewart、Paul W. Bowyer、David A. Baker、Simon A. Osborne
DOI:10.1016/j.bmcl.2019.08.014
日期:2019.10
Focussed studies on imidazopyridine inhibitors of Plasmodium falciparum cyclic GMP-dependent protein kinase (PfPKG) have significantly advanced the series towards desirable in vitro property space. LLE-based approaches towards combining improvements in cell potency, key physicochemical parameters and structural novelty are described, and a structure-based design hypothesis relating to substituent regiochemistry has directed efforts towards key examples with well-balanced potency, ADME and kinase selectivity profiles.