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Updated: Feb 6, 2026

Nano-Differential Scanning Fluorimetry for Screening in Fragment-based Lead Discovery
Published on: May 16, 2021
Discovery and hit-to-lead evaluation of piperazine amides as selective, state-dependent NaV1.7 inhibitors
Brian A Sparling1, S Yi1, J Able2
1Department of Medicinal Chemistry , Amgen Inc. , 360 Binney Street , Cambridge , MA 02142 , USA .
Abstract:
NaV1.7 is a particularly compelling target for the treatment of pain. Herein, we report the discovery and evaluation of a series of piperazine amides that exhibit state-dependent inhibition of NaV1.7. After demonstrating significant pharmacodynamic activity with early lead compound 14 in a NaV1.7-dependent behavioural mouse model, we systematically established SAR trends throughout each sector of the scaffold. The information gleaned from this modular analysis was then applied additively to quickly access analogues that encompass an optimal balance of properties, including NaV1.7 potency, selectivity over NaV1.5, aqueous solubility, and microsomal stability.
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