Discovery of 6-(2,4-difluorophenoxy)-2-[3-hydroxy-1-(2-hydroxyethyl)propylamino]-8-methyl-8H-p yrido[2,3-d]pyrimidin-7-one (pamapimod) and 6-(2,4-difluorophenoxy)-8-methyl-2-(tetrahydro-2H-pyran-4-ylamino)pyrido[2,3-d]py rimidin-7(8H)-one (R1487) as orally bioavailable and highly selective inhibitors of p38alpha mitogen-activated protein kinase.

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Goldstein DM, Soth M, Gabriel T, Dewdney N, Kuglstatter A, Arzeno H, Chen J, Bingenheimer W, Dalrymple SA, Dunn J, Farrell R, Frauchiger S, La Fargue J, Ghate M, Graves B, Hill RJ, Li F, Litman R, Loe B, McIntosh J, McWeeney D, Papp E, Park J, Reese HF, Roberts RT, Rotstein D, San Pablo B, Sarma K, Stahl M, Sung ML, Suttman RT, Sjogren EB, Tan Y, Trejo A, Welch M, Weller P, Wong BR, Zecic H

Discovery of 6-(2,4-difluorophenoxy)-2-[3-hydroxy-1-(2-hydroxyethyl)propylamino]-8-methyl-8H-p yrido[2,3-d]pyrimidin-7-one (pamapimod) and 6-(2,4-difluorophenoxy)-8-methyl-2-(tetrahydro-2H-pyran-4-ylamino)pyrido[2,3-d]py rimidin-7(8H)-one (R1487) as orally bioavailable and highly selective inhibitors of p38alpha mitogen-activated protein kinase.

J Med Chem. 2011 Apr 14;54(7):2255-65. doi: 10.1021/jm101423y. Epub 2011 Mar 4.

PubMed ID

21375264 [ View in PubMed

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Abstract

The development of a new series of p38alpha inhibitors resulted in the identification of two clinical candidates, one of which was advanced into a phase 2 clinical study for rheumatoid arthritis. The original lead, an lck inhibitor that also potently inhibited p38alpha, was a screening hit from our kinase inhibitor library. This manuscript describes the optimization of the lead to p38-selective examples with good pharmacokinetic properties.

DrugBank Data that Cites this Article

Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
R-1487	Mitogen-activated protein kinase 14	Protein	Humans	Yes	Inhibitor	Details