- Structure-guided evolution of potent and selective CHK1 inhibitors through scaffold morphing
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Pyrazolopyridine inhibitors with low micromolar potency for CHK1 and good selectivity against CHK2 were previously identified by fragment-based screening. The optimization of the pyrazolopyridines to a series of potent and CHK1-selective isoquinolines demonstrates how fragment-growing and scaffold morphing strategies arising from a structure-based understanding of CHK1 inhibitor binding can be combined to successfully progress fragment-derived hit matter to compounds with activity in vivo. The challenges of improving CHK1 potency and selectivity, addressing synthetic tractability, and achieving novelty in the crowded kinase inhibitor chemical space were tackled by multiple scaffold morphing steps, which progressed through tricyclic pyrimido[2,3-b] azaindoles to N-(pyrazin-2-yl)pyrimidin-4-amines and ultimately to imidazo[4,5-c]pyridines and isoquinolines. A potent and highly selective isoquinoline CHK1 inhibitor (SAR-020106) was identified, which potentiated the efficacies of irinotecan and gemcitabine in SW620 human colon carcinoma xenografts in nude mice. (Figure presented)
- Reader, John C.,Matthews, Thomas P.,Klair, Suki,Cheung, Kwai-Ming J.,Scanlon, Jane,Proisy, Nicolas,Addison, Glynn,Ellard, John,Piton, Nelly,Taylor, Suzanne,Cherry, Michael,Fisher, Martin,Boxall, Kathy,Burns, Samantha,Walton, Michael I.,Westwood, Isaac M.,Hayes, Angela,Eve, Paul,Valenti, Melanie,De Haven Brandon, Alexis,Box, Gary,Van Montfort, Rob L. M.,Williams, David H.,Aherne, G. Wynne,Raynaud, Florence I.,Eccles, Suzanne A.,Garrett, Michelle D.,Collins, Ian
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p. 8328 - 8342
(2012/02/06)
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- BICYCLYLARYL-ARYL-AMINE COMPOUNDS AND THEIR USE
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The present invention pertains generally to the field of therapeutic compounds, and more specifically to certain bicyclylaryl-aryl-amines compounds of the following formula (referred to herein as BCAA compounds), which, inter alia, inhibit Checkpoint Kinase 1 (CHK1) kinase function. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both in vitro and in vivo, to inhibit CHK1 kinase function, and in the treatment of diseases and conditions that are mediated by CHK1, that are ameliorated by the inhibition of CHK1 kinase function, etc., including proliferative conditions such as cancer, etc., optionally in combination with another agent, for example, (a) a DNA topoisomerase I or II inhibitor; (b) a DNA damaging agent; (c) an antimetabolite or TS inhibitor; (d) a microtubule targeted agent; and (e) ionising radiation: (I).
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