Discovery of a series of 8-(1-phenylpyrrolidin-2-yl)-6-carboxamide-2-morpholino-4H-chromen-4-one as PI3Kβ/δ inhibitors for the treatment of PTEN-deficient tumours
作者:Bernard Barlaam、Sabina Cosulich、Sébastien Degorce、Rebecca Ellston、Martina Fitzek、Stephen Green、Urs Hancox、Christine Lambert-van der Brempt、Jean-Jacques Lohmann、Mickaël Maudet、Rémy Morgentin、Patrick Plé、Lara Ward、Nicolas Warin
DOI:10.1016/j.bmcl.2017.03.027
日期:2017.5
Attempts to lock the active conformation of compound 4, a PI3K beta/delta inhibitor (PI3K beta cell IC50 0.015 mu M), led to the discovery of a series of 8-(1-phenylpyrrolidin-2-y1)-6-carboxamide-2-morpholino-4H-chromen-4-ones, which showed high levels of potency and selectivity as PI3K beta/delta inhibitors. Compound 10 proved exquisitely potent and selective: PI3K beta cell IC50 0.0011 mu M in PTEN null MDA-MB-468 cell and PI3K delta cell IC50 0.014 mu M in Jeko-1 B-cell, and exhibited suitable physical properties for oral administration. In vivo, compound 10 showed profound pharmacodynamic modulation of AILS phosphorylation in a mouse PTEN-null PC3 prostate tumour xenograft after a single oral dose and gave excellent tumour growth inhibition in the same model after chronic oral dosing. Based on these results, compound 10 was selected as one of our PI3K beta/delta preclinical candidates. (C) 2017 Elsevier Ltd. All rights reserved.