5-Lipoxygenase-Activating Protein (FLAP) Inhibitors. Part 4: Development of 3-[3-<i>tert</i>-Butylsulfanyl-1-[4-(6-ethoxypyridin-3-yl)benzyl]-5-(5-methylpyridin-2-ylmethoxy)-1<i>H</i>-indol-2-yl]-2,2-dimethylpropionic Acid (AM803), a Potent, Oral, Once Daily FLAP Inhibitor
作者:Nicholas S. Stock、Gretchen Bain、Jasmine Zunic、Yiwei Li、Jeannie Ziff、Jeffrey Roppe、Angelina Santini、Janice Darlington、Pat Prodanovich、Christopher D. King、Christopher Baccei、Catherine Lee、Haojing Rong、Charles Chapman、Alex Broadhead、Dan Lorrain、Lucia Correa、John H. Hutchinson、Jilly F. Evans、Peppi Prasit
DOI:10.1021/jm2008369
日期:2011.12.8
The potent 5-lipoxygenase-activating protein (FLAP) inhibitor 3-[3-tert-butylsulfanyl-1-[4-(6-ethoxypyridin-3-yl)benzyl]-5-(5-methylpyridin-2-ylmethoxy)-1H-indol-2-yl]-2,2-dimethylpropionic acid 11cc is described (AM803, now GSK2190915). Building upon AM103 (1) (Hutchinson et al. J. Med Chem. 2009, 52, 5803-5815; Stock et al. Bioorg. Med. Chem. Lett. 2010, 20, 213-217; Stock et al. Bioorg. Med. Chem. Lett. 2010, 20, 4598-4601), SAR studies centering around the pyridine moiety led to the discovery of compounds that exhibit significantly increased potency in a human whole blood assay measuring LTB4 inhibition with longer drug preincubation times (15 min vs S h). Further studies identified 11cc with a potency of 2.9 nM in FLAP binding, an IC50 of 76 nM for inhibition of LTB4 in human blood (5 h incubation) and excellent preclinical toxicology and pharmacoldnetics in rat and dog. 11cc also demonstrated an extended pharmacodynamic effect in a rodent bronchoalveolar lavage (BAL) model. This compound has successfully completed phase 1 clinical studies in healthy volunteers and is currently undergoing phase 2 trials in asthmatic patients.