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KKB Hot Article: 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. |
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Written by KKB
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Tuesday, 20 April 2010 19:36 |
| Citation: 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. |
Authors: Verheijen JC, Richard DJ, Curran K, Kaplan J, Lefever M, Nowak P, Malwitz DJ, Brooijmans N, Toral-Barza L, Zhang WG, Lucas J, Hollander I, Ayral-Kaloustian S, Mansour TS, Yu K, Zask A.
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| PubMed PMID: 19894727 |
Abstract: 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).
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Targets: ATR, AURKB, CSNK1G1, FRAP1, MAPK14, MTOR, PIK3CA, PIK3CB, PIK3CD, PIK3CG
Number of SAR data points: 222
Number of Targets: 10
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Last Updated on Saturday, 20 August 2011 00:07 |
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