Identification and Characterisation of 2-Aminopyridine Inhibitors of Checkpoint Kinase 2Hilton, S., Naud, S., Caldwell, J.J., Boxall, K., Burns, S., Anderson, V.E., Antoni, L., Allen, C.E., Pearl, L.H., Oliver, A.W., Aherne, G.W., Garrett, M.D., Collins, I.
(2010) Bioorg Med Chem 18: 707
- PubMed: 20022510
- DOI: https://doi.org/10.1016/j.bmc.2009.11.058
- Primary Citation of Related Structures:
2WTC, 2WTD, 2WTI, 2WTJ
- PubMed Abstract:
5-(Hetero)aryl-3-(4-carboxamidophenyl)-2-aminopyridine inhibitors of CHK2 were identified from high throughput screening of a kinase-focussed compound library. Rapid exploration of the hits through straightforward chemistry established structure-activity relationships and a proposed ATP-competitive binding mode which was verified by X-ray crystallography of several analogues bound to CHK2. Variation of the 5-(hetero)aryl substituent identified bicyclic dioxolane and dioxane groups which improved the affinity and the selectivity of the compounds for CHK2 versus CHK1. The 3-(4-carboxamidophenyl) substituent could be successfully replaced by acyclic omega-aminoalkylamides, which made additional polar interactions within the binding site and led to more potent inhibitors of CHK2. Compounds from this series showed activity in cell-based mechanistic assays for inhibition of CHK2.
Cancer Research UK Centre for Cancer Therapeutics, The Institute of Cancer Research, 15 Cotswold Road, Sutton, Surrey SM2 5NG, UK.