Synthesis and biological evaluation of 3-aminoisoquinolin-1(2H)-one based inhibitors of the dual-specificity phosphatase Cdc25B
作者:Kara M. George Rosenker、William D. Paquette、Paul A. Johnston、Elizabeth R. Sharlow、Andreas Vogt、Ahmet Bakan、John S. Lazo、Peter Wipf
DOI:10.1016/j.bmc.2015.01.043
日期:2015.6
The cell division cycle 25B dual specificity phosphatase (Cdc25B) regulates the normal progression of the mammalian cell cycle by dephosphorylating and activating cyclin-dependent kinase (Cdk) complexes, particularly in response to DNA damage. Elevated Cdc25B levels enable a bypass of normal cell cycle checkpoints, and the overexpression of Cdc25B has been linked to a variety of human cancers. Thus, Cdc25B is an attractive target for the development of anticancer therapeutics. Herein we describe the synthesis and biological evaluation of a series of non-quinoid inhibitors of Cdc25B containing the 3-aminoisoquinolin-1(2H)-one pharmacophore. In addition to several strategies that address specific substitution patterns on isoquinolines, we have applied a regioselective Pd-catalyzed cross-coupling methodology to synthesize a new lead structure, 6-(3-aminophenyl)-3-(phenylamino) isoquinolin-1(2H)-one (13), which proved to be a reversible, competitive Cdc25B inhibitor with a K-i of 1.9 mu M. Compound 13 prevented human cancer cell growth and blocked Cdc25B-mediated mitotic checkpoint bypass. Molecular docking studies support binding near the catalytic site. (C) 2015 Published by Elsevier Ltd.