2,8-Disubstituted-1,6-Naphthyridines and 4,6-Disubstituted-Isoquinolines with Potent, Selective Affinity for CDK8/19
作者:Aurélie Mallinger、Kai Schiemann、Christian Rink、Jimmy Sejberg、Mark A. Honey、Paul Czodrowski、Mark Stubbs、Oliver Poeschke、Michael Busch、Richard Schneider、Daniel Schwarz、Djordje Musil、Rosemary Burke、Klaus Urbahns、Paul Workman、Dirk Wienke、Paul A. Clarke、Florence I. Raynaud、Suzanne A. Eccles、Christina Esdar、Felix Rohdich、Julian Blagg
DOI:10.1021/acsmedchemlett.6b00022
日期:2016.6.9
We demonstrate a designed scaffold-hop approach to the discovery of 2,8-disubstituted-1,6-naphthyridine- and 4,6-disubstituted-isoquinoline-based dual CDK8/19 ligands. Optimized compounds in both series exhibited rapid aldehyde oxidase-mediated metabolism, which could be abrogated by introduction of an amino substituent at C5 of the 1,6-naphthyridine scaffold or at C1 of the isoquinoline scaffold. Compounds 51 and 59 were progressed to in vivo pharmacokinetic studies, and 51 also demonstrated sustained inhibition of STAT1(SER727) phosphorylation, a biomarker of CDK8 inhibition, in an SW620 colorectal carcinoma human tumor xenograft model following oral dosing.