PMID- 21332118 OWN - NLM STAT- MEDLINE DCOM- 20110617 LR - 20211203 IS - 1520-4804 (Electronic) IS - 0022-2623 (Linking) VI - 54 IP - 6 DP - 2011 Mar 24 TI - Discovery and optimization of a series of benzothiazole phosphoinositide 3-kinase (PI3K)/mammalian target of rapamycin (mTOR) dual inhibitors. PG - 1789-811 LID - 10.1021/jm1014605 [doi] AB - Phosphoinositide 3-kinase alpha (PI3Kalpha) is a lipid kinase that plays a key regulatory role in several cellular processes. The mutation or amplification of this kinase in humans has been implicated in the growth of multiple tumor types. Consequently, PI3Kalpha has become a target of intense research for drug discovery. Our studies began with the identification of benzothiazole compound 1 from a high throughput screen. Extensive SAR studies led to the discovery of sulfonamide 45 as an early lead, based on its in vitro cellular potency. Subsequent modifications of the central pyrimidine ring dramatically improved enzyme and cellular potency and led to the identification of chloropyridine 70. Further arylsulfonamide SAR studies optimized in vitro clearance and led to the identification of 82 as a potent dual inhibitor of PI3K and mTOR. This molecule exhibited potent enzyme and cell activity, low clearance, and high oral bioavailability. In addition, compound 82 demonstrated tumor growth inhibition in U-87 MG, A549, and HCT116 tumor xenograft models. FAU - D'Angelo, Noel D AU - D'Angelo ND AD - Department of Medicinal Chemistry, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320-1799, United States. dangelo@amgen.com FAU - Kim, Tae-Seong AU - Kim TS FAU - Andrews, Kristin AU - Andrews K FAU - Booker, Shon K AU - Booker SK FAU - Caenepeel, Sean AU - Caenepeel S FAU - Chen, Kui AU - Chen K FAU - D'Amico, Derin AU - D'Amico D FAU - Freeman, Dan AU - Freeman D FAU - Jiang, Jian AU - Jiang J FAU - Liu, Longbin AU - Liu L FAU - McCarter, John D AU - McCarter JD FAU - San Miguel, Tisha AU - San Miguel T FAU - Mullady, Erin L AU - Mullady EL FAU - Schrag, Michael AU - Schrag M FAU - Subramanian, Raju AU - Subramanian R FAU - Tang, Jin AU - Tang J FAU - Wahl, Robert C AU - Wahl RC FAU - Wang, Ling AU - Wang L FAU - Whittington, Douglas A AU - Whittington DA FAU - Wu, Tian AU - Wu T FAU - Xi, Ning AU - Xi N FAU - Xu, Yang AU - Xu Y FAU - Yakowec, Peter AU - Yakowec P FAU - Yang, Kevin AU - Yang K FAU - Zalameda, Leeanne P AU - Zalameda LP FAU - Zhang, Nancy AU - Zhang N FAU - Hughes, Paul AU - Hughes P FAU - Norman, Mark H AU - Norman MH LA - eng PT - Journal Article DEP - 20110218 PL - United States TA - J Med Chem JT - Journal of medicinal chemistry JID - 9716531 RN - 0 (Antineoplastic Agents) RN - 0 (Benzothiazoles) RN - 0 (N-(6-(6-chloro-5-(4-fluorophenylsulfonamido)pyridin-3-yl)benzo(d)thiazol-2-yl)acetamide) RN - 0 (Phosphoinositide-3 Kinase Inhibitors) RN - 0 (Sulfonamides) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Animals MH - Antineoplastic Agents/*chemical synthesis/chemistry/pharmacology MH - Benzothiazoles/*chemical synthesis/chemistry/pharmacology MH - Binding Sites MH - Biological Availability MH - Cell Line, Tumor MH - Crystallography, X-Ray MH - Drug Screening Assays, Antitumor MH - Female MH - Humans MH - Liver/drug effects/metabolism MH - Mice MH - Mice, Nude MH - Models, Molecular MH - Neoplasm Transplantation MH - *Phosphoinositide-3 Kinase Inhibitors MH - Phosphorylation MH - Proto-Oncogene Proteins c-akt/metabolism MH - Rats MH - Structure-Activity Relationship MH - Sulfonamides/*chemical synthesis/chemistry/pharmacology MH - TOR Serine-Threonine Kinases/*antagonists & inhibitors MH - Transplantation, Heterologous EDAT- 2011/02/22 06:00 MHDA- 2011/06/18 06:00 CRDT- 2011/02/22 06:00 PHST- 2011/02/22 06:00 [entrez] PHST- 2011/02/22 06:00 [pubmed] PHST- 2011/06/18 06:00 [medline] AID - 10.1021/jm1014605 [doi] PST - ppublish SO - J Med Chem. 2011 Mar 24;54(6):1789-811. doi: 10.1021/jm1014605. Epub 2011 Feb 18.