Inhibitors of the renal outer medullary potassium channel (ROMK) show promise as novel mechanism diuretics, with potentially lower risk of diuretic-induced hypokalemia relative to current thiazide and loop diuretics. Here, we report the identification of a novel series of 3-sulfamoylbenzamide ROMK inhibitors. Starting from HTS hit 4, this series was optimized to provide ROMK inhibitors with good in vitro potencies and well-balanced ADME profiles. In contrast to previously reported small-molecule ROMK inhibitors, members of this series were demonstrated to be highly selective for inhibition of human over rat ROMK and to be insensitive to the N171D pore mutation that abolishes inhibitory activity of previously reported ROMK inhibitors.

中文翻译：

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发现和体外优化3-氨磺酰基苯甲酰胺作为ROMK抑制剂

肾外髓质钾通道（ROMK）抑制剂有望作为新型机制利尿剂，与目前的噻嗪类和loop利尿剂相比，利尿剂引起的低钾血症的风险可能更低。在这里，我们报告的新型3-氨磺酰苯甲酰胺ROMK抑制剂的鉴定。从HTS 4开始，对该系列进行了优化，以为ROMK抑制剂提供良好的体外效能和均衡的ADME谱。与先前报道的小分子ROMK抑制剂相反，该系列成员被证明对人类的抑制作用高于对大鼠ROMK的抑制作用，并且对消除先前报道的ROMK抑制剂的抑制活性的N171D孔突变不敏感。