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Sutherlin, Daniel P; Sampath, Deepak; Berry, Megan; Castanedo, Georgette; Chang, Zhigang; Chuckowree, Irina; Dotson, Jenna; Folkes, Adrian; Friedman, Lori; Goldsmith, Richard; Heffron, Tim; Lee, Leslie; Lesnick, John; Lewis, Cristina; Mathieu, Simon; Nonomiya, Jim; Olivero, Alan; Pang, Jodie; Prior, Wei Wei; Salphati, Laurent; Sideris, Steve; Tian, Qingping; Tsui, Vickie; Wan, Nan Chi; Wang, Shumei; Wiesmann, Christian; Wong, Susan; Zhu, Bing-Yan
Journal of medicinal chemistry, 02/2010, Volume: 53, Issue: 3Journal Article
The PI3K/AKT/mTOR pathway has been shown to play an important role in cancer. Starting with compounds 1 and 2 (GDC-0941) as templates, (thienopyrimidin-2-yl)aminopyrimidines were discovered as potent inhibitors of PI3K or both PI3K and mTOR. Structural information derived from PI3Kγ−ligand cocrystal structures of 1 and 2 were used to design inhibitors that maintained potency for PI3K yet improved metabolic stability and oral bioavailability relative to 1. The addition of a single methyl group to the optimized 5 resulted in 21, which had significantly reduced potency for mTOR. The lead compounds 5 (GNE-493) and 21 (GNE-490) have good pharmacokinetic (PK) parameters, are highly selective, demonstrate knock down of pathway markers in vivo, and are efficacious in xenograft models where the PI3K pathway is deregulated. Both compounds were compared in a PI3Kα mutated MCF7.1 xenograft model and were found to have equivalent efficacy when normalized for exposure.
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