Amides of 4-hydroxy-8-methanesulfonylamino-quinoline-2-carboxylic acid as zinc-dependent inhibitors of Lp-PLA2

AX10479, the phenyl amide of 4-hydroxy-8-methanesulfonylamino-quinoline-2-carboxylic acid, was identified as a Zn2+-dependent, 27 nM inhibitor of human plasma Lp-PLA2. Structure-activity relationship studies focused on the AX10479 2-phenylamide group identified equipotent cycloaliphatic amides, an enantioselective preference for chiral amides, and phenyl substitution patterns (e.g., 2-methyl-3-fluoro) that increased potency.