Discovery of selective and orally available spiro-3-piperidyl ATP-competitive MK2 inhibitors
作者:Allard Kaptein、Arthur Oubrie、Edwin de Zwart、Niels Hoogenboom、Joeri de Wit、Bas van de Kar、Maaike van Hoek、Gerard Vogel、Vera de Kimpe、Carsten Schultz-Fademrecht、Judith Borsboom、Mario van Zeeland、Judith Versteegh、Bert Kazemier、Jeroen de Roos、Frank Wijnands、John Dulos、Martin Jaeger、Paula Leandro-Garcia、Tjeerd Barf
DOI:10.1016/j.bmcl.2011.04.016
日期:2011.6
The identification of a potent, selective, and orally available MK2 inhibitor series is described. The initial absence of oral bioavailability was successfully tackled by moving the basic nitrogen of the spiro-4-piperidyl moiety towards the electron-deficient pyrrolepyridinedione core, thereby reducing the pK(a) and improving Caco-2 permeability. The resulting racemic spiro-3-piperidyl analogues were separated by chiral preparative HPLC, and the activity towards MK2 inhibition was shown to reside mostly in the first eluting stereoisomer. This led to the identification of new MK2 inhibitors, such as (S)-23, with low nanomolar biochemical inhibition (EC(50) 7.4 nM) and submicromolar cellular target engagement activity (EC(50) 0.5 mu M). (C) 2011 Elsevier Ltd. All rights reserved.