Discovery and Optimization of Pyrimidone Indoline Amide PI3Kβ Inhibitors for the Treatment of Phosphatase and Tensin Homologue (PTEN)-Deficient Cancers
作者:Victor Certal、Jean-Christophe Carry、Frank Halley、Angela Virone-Oddos、Fabienne Thompson、Bruno Filoche-Rommé、Youssef El-Ahmad、Andreas Karlsson、Véronique Charrier、Cécile Delorme、Alexey Rak、Pierre-Yves Abecassis、Céline Amara、Loïc Vincent、Hélène Bonnevaux、Jean-Paul Nicolas、Magali Mathieu、Thomas Bertrand、Jean-Pierre Marquette、Nadine Michot、Tsiala Benard、Marc-Antoine Perrin、Olivier Lemaitre、Stephane Guerif、Sébastien Perron、Sylvie Monget、Florence Gruss-Leleu、Gilles Doerflinger、Houlfa Guizani、Maurice Brollo、Laurence Delbarre、Luc Bertin、Patrick Richepin、Véronique Loyau、Carlos Garcia-Echeverria、Christoph Lengauer、Laurent Schio
DOI:10.1021/jm401642q
日期:2014.2.13
Compelling molecular biology publications have reported the implication of phosphoinositide kinase PI3K beta in PTEN-deficient cell line growth and proliferation. These findings supported a scientific rationale for the development of PI3K beta-specific inhibitors for the treatment of PTEN-deficient cancers. This paper describes the discovery of 2-[2-(2,3-dihydro-indol-1-yl)-2-oxo-ethyl]-6-morpholin-4-yl-3H-pyrimidin-4-one (7) and the optimization of this new series of active and selective pyrimidone indoline amide PI3K beta inhibitors. 2-[2-(2-Methyl-2,3-dihydro-indol-1-yl)-2-oxo-ethyl]-6-morpholin-4-yl-3H-pyrimidin-4-one (28), identified following a carefully designed methyl scan, displayed improved physicochemical and in vitro pharmacokinetic properties. Structural biology efforts enabled the acquisition of the first X-ray cocrystal structure of p110 beta with the selective inhibitor compound 28 bound to the ATP site. The nonplanar binding mode described herein is consistent with observed structure-activity relationship for the series. Compound 28 demonstrated significant in vivo activity in a UACC-62 xenograft model in mice, warranting further preclinical investigation. Following successful development, compound 28 entered phase I/Ib clinical trial in patients with advanced cancer.