Discovery of ((<i>S</i>)-5-(Methoxymethyl)-7-(1-methyl-1<i>H</i>-indol-2-yl)-2-(trifluoromethyl)-4,7-dihydropyrazolo[1,5-<i>a</i>]pyrimidin-6-yl)((<i>S</i>)-2-(3-methylisoxazol-5-yl)pyrrolidin-1-yl)methanone As a Potent and Selective I<sub>Kur</sub> Inhibitor
作者:Heather J. Finlay、John Lloyd、Wayne Vaccaro、Alexander Kover、Lin Yan、Gauri Bhave、Joseph Prol、Tram Huynh、Rao Bhandaru、Yolanda Caringal、John DiMarco、Jinping Gan、Tim Harper、Christine Huang、Mary Lee Conder、Huabin Sun、Paul Levesque、Michael Blanar、Karnail Atwal、Ruth Wexler
DOI:10.1021/jm201386u
日期:2012.4.12
Subsequent optimization for potency and PK properties lead to the discovery of ((S)-5-(methoxymethyl)-7-(1-methyl-1H-indol-2-yl)-2-(trifluoromethyl)-4,7-dihydropyrazolo[1,5-a]pyrimidin-6-yl)((S)-2-(3-methylisoxazol-5-yl)pyrrolidin-1-yl)methanone (13j), with an acceptable PK profile in preclinical species and potent efficacy in the preclinical rabbit atrial effective refractory period (AERP) model.
先前公开的二氢吡唑并嘧啶是I Kur电流的有效和选择性阻滞剂。这种化学型的潜在缺陷是反应性代谢产物的形成,该代谢产物在体外表现出与蛋白质的共价结合。当在2或3位取代时,该模板产生有效的I Kur抑制剂,对h ERG的选择性不形成反应性代谢产物。随后对效能和PK性质的优化导致发现((S)-5-(甲氧基甲基)-7-(1-甲基-1 H-吲哚-2-基)-2-(三氟甲基)-4,7-二氢吡唑并[1,5- a ]嘧啶-6-基)((S)-2-(3-甲基异恶唑-5-基)吡咯烷-1-基)甲酮(13j),在临床前物种中具有可接受的PK曲线,并且在临床前兔心房有效不应期(AERP)模型中具有有效功效。