期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 51, 期 14, 页码 4122-4149出版社
AMER CHEMICAL SOC
DOI: 10.1021/jm701529q
关键词
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The synthesis, biological testing, and SAR of novel 2,4,5- and 1,2,4,5-substituted 2-thioimidazoles are described. Amino, oxy, or thioxy substituents at the 2-position of the pyridinyl moiety were evaluated for their contributions to inhibitor potency and selectivity against p38 mitogen activated protein kinase (p38 MAPK) as well as for the ability to minimize cytochrome P450 (CYP450) inhibition. Incorporation of polar substituted (cyclo)aliphatic amino substituents (e.g., tetrahydropyranyl amino), which positively interacted with the surface-exposed front region (hydrophobic region II) of the enzyme led to the identification of extremely potent p38 MAPK inhibitors with p38 IC(50) values in the low nanomolar range. Approximately 90 pyridinylimidazole-based compounds with a range of potencies against p38 alpha MAP kinase were further investigated for their ability to inhibit the release of tumor necrosis factor-alpha (TNF alpha) and/or interleukin-1 beta (IL-1 beta) from human whole blood. Some of the most promising drug candidates underwent selectivity profiling against a panel of 17 different kinases besides p38 alpha and/or were tested for their interaction potential toward a number of metabolically relevant CYP450 isozymes.
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