Design, Synthesis, and Evaluation of Novel 2-Substituted 3-Hydroxypyridin-4-ones: Structure−Activity Investigation of Metalloenzyme Inhibition by Iron Chelators
作者:Zu D. Liu、Reem Kayyali、Robert C. Hider、John B. Porter、Anthony E. Theobald
DOI:10.1021/jm010817i
日期:2002.1.1
A range of novel 3-hydroxypyridin-4-ones with different R(2) substitutents has been synthesized for the investigation of the structure-activity relationship between the chemical nature of the ligand and the inhibitory activity of the iron-containing metalloenzyme 5-lipoxygenase. Results indicate that the molecular dimensions, together with the lipophilicity, have a critical impact on the ability of this class of chelator to inhibit 5-lipoxygenase. Hydrophilic ligands with a bulky R(2) substitutent tend to be weak inhibitors; thus 1,6-dimethyl-2-(4'-N-n-propylsuccinamido)methyl-3-hydroxypyridin-4(1H)-one (22b) which has the largest R(2) substitutent only caused 2% inhibition of the enzyme activity after 30 min incubation at 110 muM IBE (iron-binding equivalents), as compared with deferiprone which caused 40% inhibition of the enzyme activity, under the same conditions.