Journal : J. Med. Chem.
Title : Discovery of 6-(2,4-difluorophenoxy)-2-[3-hydroxy-1-(2-hydroxyethyl)propylamino]-8-methyl-8H-pyrido[2,3-d]pyrimidin-7-one (pamapimod) and 6-(2,4-difluorophenoxy)-8-methyl-2-(tetrahydro-2H-pyran-4-ylamino)pyrido[2,3-d]pyrimidin-7(8H)-one (R1487) as orally bioavailable and highly selective inhibitors of p38α mitogen-activated protein kinase.
Year : 2011
Volume : 54
Issue : 7
First Page : 2255
Last Page : 2265
Authors : 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.
Abstract : The development of a new series of p38α 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 p38α, 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.