Starting from our previous eIF4A3-selective inhibitor 1a, a novel series of (piperazine-1-carbonyl)pyridin-2(1H)-one derivatives was designed, synthesized, and evaluated for identification of orally bioavailable probe molecules. Compounds 1o and 1q showed improved physicochemical and ADMET profiles, while maintaining potent and subtype-selective eIF4A3 inhibitory potency. In accord with their promising PK profiles and results from initial in vivo PD studies, compounds 1o and 1q showed antitumor efficacy with T/C values of 54% and 29%, respectively, without severe body weight loss. Thus, our novel series of compounds represents promising probe molecules for the in vivo pharmacological study of selective eIF4A3 inhibition.

中文翻译：

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新型5-（哌嗪-1-羰基）吡啶-2（1 H）-one衍生物作为口服eIF4A3选择性抑制剂的发现

从我们先前的eIF4A3选择性抑制剂1a开始，设计，合成并评估了一系列新的（哌嗪-1-羰基）吡啶2-2 （1 H）-one衍生物，以鉴定口服生物可利用的探针分子。化合物1o和1q表现出改善的理化和ADMET谱，同时保持了有效的和亚型选择性的eIF4A3抑制能力。化合物1o和1q与它们有希望的PK曲线和最初的体内PD研究结果相符显示出抗肿瘤功效，T / C值分别为54％和29％，而没有严重的体重减轻。因此，我们的新型化合物代表了对选择性eIF4A3抑制作用进行体内药理研究的有前途的探针分子。