Synthesis and Biological Evaluation of 3-Biphenyl-4-yl-4-phenyl-4H-1,2,4-triazoles as Novel Glycine Transporter 1 Inhibitors
摘要:
We describe the preparation and evaluation of a novel series of glycine transporter 1 (GlyT1) inhibitors derived from a high-throughput screening hit The SAR studies resulted in the discovery of 3-biphenyl-4-yl-4-(2 fluorophenyl)-5-isopropyl-4H-1,2,4-triazole (6p) A pharmacokinetic study was also conducted and revealed that 6p had excellent oral bioavailability and ameliorated learning impairment in passive avoidance tasks in mice
We report on the optimization of 4H-1,2,4-triazole derivatives to increase their activity and selectivity as glycine transporter 1 (GlyT1) inhibitors. Structure-activity relationship exploration resulted in the identification of a 3-[3-ethyl-5-(6-phenylpyridin-3-yl)-4H-1,2,4-triazol-4-yl]-2-methyl-benzonitrile (14u) compound with markedly higher selectivity for GlyT1. Physiochemical studies revealed that 14u exists as a stable pair of atropisomers under physiological conditions. We successfully separated the atropisomers to obtain active enantiomer (R)-14u, which displayed favorable pharmacokinetic properties, as well as positive results in the mice Y-maze test.