Nonpeptide endothelin antagonists: from lower affinity pyrazol-5-ols to higher affinity pyrazole-5-carboxylic acids
摘要:
Random screening of compounds in endothelin receptor (ETA and ETB) binding assays led to the discovery of a new class of pyrazol-5-ol ligands. Characterization of structural features crucial for binding activities of these pyrazol-5-ols, by structure-activity-relationship (SAR) studies, allowed us to design a novel class of pyrazole-5-carboxylic acids as more potent ET antagonists. (C) 2000 Elsevier Science Ltd. All rights reserved.
The discovery and structure-activity relationship of a novel series of coumarin-based TNF-alpha inhibitors is described. Starting from the initial lead la, various derivatives were prepared surrounding the coumarin core structure to optimize the in vitro inhibitory activity of TNF-alpha production by human peripheral blood mononuclear cells (hPBMC), stimulated by bacterial lipopolysaccharide (LPS). Selected compounds also demonstrated in vivo inhibition of TNF-alpha production in rats. (C) 2004 Elsevier Ltd. All rights reserved.