Isoxazolo[3,4-b]quinoline-3,4(1H,9H)-diones as unique, potent and selective inhibitors for Pim-1 and Pim-2 kinases: Chemistry, biological activities, and molecular modeling
作者:Yunsong Tong、Kent D. Stewart、Sheela Thomas、Magdalena Przytulinska、Eric F. Johnson、Vered Klinghofer、Joel Leverson、Owen McCall、Niru B. Soni、Yan Luo、Nan-horng Lin、Thomas J. Sowin、Vincent L. Giranda、Thomas D. Penning
DOI:10.1016/j.bmcl.2008.08.079
日期:2008.10
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.
Unexpected Reactivity of Trifluoromethyl Diazomethane (CF<sub>3</sub>CHN<sub>2</sub>): Electrophilicity of the Terminal N-Atom
作者:Anton V. Arkhipov、Viatcheslav V. Arkhipov、Janine Cossy、Volodymir O. Kovtunenko、Pavel K. Mykhailiuk
DOI:10.1021/acs.orglett.6b01565
日期:2016.7.15
After more than 70 years since its discovery, CF3CHN2 was found to possess a novel reactivity mode: N-terminal electrophile. With C-nucleophiles it gives hydrazones that are easily transformed into valuable CF3-heterocycles.