Discovery of Benzimidazole Oxazolidinediones as Novel and Selective Nonsteroidal Mineralocorticoid Receptor Antagonists

Authors: Christine Yang, Jaume Balsells, Hong D. Chu, Jason M. Cox, Alejandro Crespo, Xiuying Ma, Lisa Contino, Patricia Brown, Sheng Gao, Beata Zamlynny, Judyann Wiltsie, Joseph Clemas, JeanMarie Lisnock, Jack Gibson, Gaochao Zhou, Margarita Garcia-Calvo, Thomas J. Bateman, Vincent Tong, Ling Xu, Martin Crook, Peter Sinclair, Hong C. Shen
Publisher/Year: ACS Med. Chem. Lett., 2015, 6 (4), pp 461–465
Pub Med ID/Journal ID: 10.1021/acsmedchemlett.5b00010


Elaboration of the oxazolidinedione series led to replacement of the exocyclic amides with substituted benzimidazoles. The structure–activity relationship (SAR) exploration resulted in the discovery of potent and selective nonsteroidal mineralocorticoid receptor (MR) antagonists with significantly improved microsomal stability and pharmacokinetic (PK) profile relative to the HTS hit 1a. One compound 2p possessed comparable efficacy as spironolactone (SPL) at 100 mg/kg (p.o.) in the rat natriuresis model. As such, this series was validated as a lead series for further optimization.