PMID- 19894727 OWN - NLM STAT- MEDLINE DCOM- 20100106 LR - 20211203 IS - 1520-4804 (Electronic) IS - 0022-2623 (Linking) VI - 52 IP - 24 DP - 2009 Dec 24 TI - Discovery of 4-morpholino-6-aryl-1H-pyrazolo[3,4-d]pyrimidines as highly potent and selective ATP-competitive inhibitors of the mammalian target of rapamycin (mTOR): optimization of the 6-aryl substituent. PG - 8010-24 LID - 10.1021/jm9013828 [doi] AB - Design and synthesis of a series of 4-morpholino-6-aryl-1H-pyrazolo[3,4-d]pyrimidines as potent and selective inhibitors of the mammalian target of rapamycin (mTOR) are described. Optimization of the 6-aryl substituent led to the discovery of inhibitors carrying 6-ureidophenyl groups, the first reported active site inhibitors of mTOR with subnanomolar inhibitory concentrations. The data presented in this paper show that 6-arylureidophenyl substituents led to potent mixed inhibitors of mTOR and phosphatidylinositol 3-kinase alpha (PI3K-alpha), whereas 6-alkylureidophenyl appendages gave highly selective mTOR inhibitors. Combination of 6-alkylureidophenyl groups with 1-carbamoylpiperidine substitution resulted in compounds with subnanomolar IC(50) against mTOR and greater than 1000-fold selectivity over PI3K-alpha. In addition, structure based drug design resulted in the preparation of several 6-arylureidophenyl-1H-pyrazolo[3,4-d]pyrimidines, substituted in the 4-position of the arylureido moiety with water solubilizing groups. These compounds combined potent mTOR inhibition (IC(50) < 1 nM) with unprecedented activity in cellular proliferation assays (IC(50) < 1 nM). FAU - Verheijen, Jeroen C AU - Verheijen JC AD - Wyeth Research, Pearl River, NY 10965, USA. verheij@wyeth.com FAU - Richard, David J AU - Richard DJ FAU - Curran, Kevin AU - Curran K FAU - Kaplan, Joshua AU - Kaplan J FAU - Lefever, Mark AU - Lefever M FAU - Nowak, Pawel AU - Nowak P FAU - Malwitz, David J AU - Malwitz DJ FAU - Brooijmans, Natasja AU - Brooijmans N FAU - Toral-Barza, Lourdes AU - Toral-Barza L FAU - Zhang, Wei-Guo AU - Zhang WG FAU - Lucas, Judy AU - Lucas J FAU - Hollander, Irwin AU - Hollander I FAU - Ayral-Kaloustian, Semiramis AU - Ayral-Kaloustian S FAU - Mansour, Tarek S AU - Mansour TS FAU - Yu, Ker AU - Yu K FAU - Zask, Arie AU - Zask A LA - eng PT - Journal Article PL - United States TA - J Med Chem JT - Journal of medicinal chemistry JID - 9716531 RN - 0 (Morpholines) RN - 0 (Protein Kinase Inhibitors) RN - 0 (Pyrazoles) RN - 0 (Pyrimidines) RN - 8L70Q75FXE (Adenosine Triphosphate) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Adenosine Triphosphate/*chemistry/metabolism MH - Binding, Competitive MH - Cell Growth Processes/drug effects MH - Cell Line, Tumor MH - Humans MH - Male MH - Models, Molecular MH - Morpholines/chemical synthesis/chemistry/pharmacology MH - Prostatic Neoplasms/drug therapy/pathology MH - Protein Kinase Inhibitors/chemical synthesis/chemistry/*pharmacology MH - Protein Kinases/*chemistry/metabolism MH - Pyrazoles/chemical synthesis/chemistry/pharmacology MH - Pyrimidines/chemical synthesis/chemistry/*pharmacology MH - Structure-Activity Relationship MH - TOR Serine-Threonine Kinases EDAT- 2009/11/10 06:00 MHDA- 2010/01/07 06:00 CRDT- 2009/11/10 06:00 PHST- 2009/11/10 06:00 [entrez] PHST- 2009/11/10 06:00 [pubmed] PHST- 2010/01/07 06:00 [medline] AID - 10.1021/jm9013828 [doi] PST - ppublish SO - J Med Chem. 2009 Dec 24;52(24):8010-24. doi: 10.1021/jm9013828.