Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 18, Issue 19, Pages 5206-5208Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2008.08.079
Keywords
Pim-1 kinase inhibitors; Pim-2 kinase inhibitors
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A series of isoxazolo[3,4-b]quinoline-3,4(1H,9H)-diones were synthesized as potent inhibitors against Pim-1 and Pim-2 kinases. The structure-activity-relationship studies started from a high-throughput screening hit and was guided by molecular modeling of inhibitors in the active site of Pim-1 kinase. Installing a hydroxyl group on the benzene ring of the core has the potential to form a key hydrogen bond interaction to the hinge region of the binding pocket and thus resulted in the most potent inhibitor, 19, with K-i values at 2.5 and 43.5 nM against Pim-1 and Pim-2, respectively. Compound 19 also exhibited an activity pro. le with a high degree of kinase selectivity. (C) 2008 Elsevier Ltd. All rights reserved.
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