Discovery of Novel and Orally Bioavailable Inhibitors of PI3 Kinase Based on Indazole Substituted Morpholino-Triazines
作者:Sundeep Dugar、Frank P. Hollinger、Dinesh Mahajan、Somdutta Sen、Bilash Kuila、Reena Arora、Yogesh Pawar、Vaibhav Shinde、Mahesh Rahinj、Kamal K. Kapoor、Rahul Bhumkar、Santosh Rai、Rakesh Kulkarni
DOI:10.1021/acsmedchemlett.5b00322
日期:2015.12.10
A new class of potent PI3K alpha inhibitors is identified based on aryl substituted morpholino-triazine scaffold. The identified compounds showed not only a high level of enzymatic and cellular potency in nanomolar range but also high oral bioavailability. The three lead molecules (based on their in vitro potency) when evaluated further for in vitro metabolic stability as well as pharmacokinetic profile led to the identification of 26, as a candidate for further development. The IC50 and EC50 value of 26 is 60 and 500 nM, respectively, for PI3Ka enzyme inhibitory activity and ovarian cancer (A2780) cell line. The identified lead also showed a high level of microsomal stability and minimal inhibition activity for CYP3A4, CYP2C19, and CYP2D6 at 10 mu M concentrations. The lead compound 26, demonstrated excellent oral bioavailability with an AUG of 5.2 mu M at a dose of 3 mpk in mice and found to be well tolerated in mice when dosed at 30 mpk BID for 5 days.