Abstract
Three types of heterocyclic moieties-piperidines fused to a heteroaromatic moiety-were explored as potential periphery motifs for the pharmacophoric core of fasiglifam (TAK-875), with fasiglifam being the most advanced agonist of free fatty acid receptor 1, a promising target for therapeutic intervention in type 2 diabetes. Several observed structure-activity relationship trends were corroborated by in silico docking results. Balanced selection based on potency and Caco-2 permeability advanced six compounds to cellular efficacy tests (glucose-stimulated insulin secretion in rat insulinoma INS1E cells). This led to the nomination of compound 16a (LK1408, 3-[4-({4-[(3-{[(2-fluorobenzyl)oxy]methyl}-1-methyl-1,4,6,7-tetrahydro-5H-pyrazolo[4,3-c]pyridin-5-yl)methyl]benzyl}oxy)phenyl]propanoic acid hydrochloride) as the lead for further development.
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