Affinity and kinetics study of anthranilic acids as HCA2 receptor agonists
摘要:
Structure-affinity relationship (SAR) and structure-kinetics relationship (SKR) studies were combined to investigate a series of biphenyl anthranilic acid agonists for the HCA(2) receptor. In total, 27 compounds were synthesized and twelve of them showed higher affinity than nicotinic acid. Two compounds, 6g (IC50 = 75 nM) and 6z (IC50 = 108 nM) showed a longer residence time profile compared to nicotinic acid, exemplified by their kinetic rate index (KRI) values of 1.31 and 1.23, respectively. The SAR study resulted in the novel 2-F, 4-OH derivative (6x) with an IC50 value of 23 nM as the highest affinity HCA(2) agonist of the biphenyl series, although it showed a similar residence time as nicotinic acid. The SAR and SKR data suggest that an early compound selection based on binding kinetics is a promising addition to the lead optimization process. (C) 2015 Elsevier Ltd. All rights reserved.
A small chemical library of 2-aminoimidazole derivatives as BACE-1 inhibitors: Structure-based design, synthesis, and biological evaluation
摘要:
In this work, we report a rational structure-based approach aimed at the discovery of new 2-aminoimidazoles as beta-secretase inhibitors. Taking advantage of a microwave-assisted synthetic protocol, a small library of derivatives was obtained and biologically evaluated. Two compounds showed promising activities in both enzymatic and cellular assays. Moreover, one of them exhibited the capability to cross the blood brain barrier as assessed by the parallel artificial membrane permeability assay. (C) 2011 Elsevier Masson SAS. All rights reserved.