ABSTRACT
During the course of our research on the lead optimisation of the NBTI (Novel Bacterial Type II Topoisomerase Inhibitors) class of antibacterials, we discovered a series of tricyclic compounds that showed good Gram-positive and Gram-negative potency. Herein we will discuss the various subunits that were investigated in this series and report advanced studies on compound 1 (GSK945237) which demonstrates good PK and in vivo efficacy properties.
Subject(s)
Anti-Bacterial Agents/pharmacology , Heterocyclic Compounds, 3-Ring/pharmacology , Heterocyclic Compounds, 4 or More Rings/chemistry , Heterocyclic Compounds, 4 or More Rings/pharmacology , Topoisomerase II Inhibitors/chemistry , Topoisomerase II Inhibitors/pharmacology , Animals , Anti-Bacterial Agents/chemistry , Anti-Bacterial Agents/pharmacokinetics , Chemistry Techniques, Synthetic , DNA Topoisomerases, Type II/chemistry , DNA Topoisomerases, Type II/metabolism , Dogs , Drug Evaluation, Preclinical/methods , ERG1 Potassium Channel/metabolism , Gram-Negative Anaerobic Bacteria/drug effects , Gram-Positive Bacteria/drug effects , Heterocyclic Compounds, 3-Ring/chemical synthesis , Heterocyclic Compounds, 3-Ring/chemistry , Pneumococcal Infections/drug therapy , Rats , Respiratory Tract Infections/drug therapy , Respiratory Tract Infections/microbiology , Topoisomerase II Inhibitors/pharmacokineticsABSTRACT
During the course of our research to find novel mode of action antibacterials, we discovered a series of hydroxyl tricyclic compounds that showed good potency against Gram-positive and Gram-negative pathogens. These compounds inhibit bacterial type IIA topoisomerases. Herein we will discuss structure-activity relationships in this series and report advanced studies on compound 1 (GSK966587) which demonstrates good PK and in vivo efficacy properties. X-ray crystallographic studies were used to provide insight into the structural basis for the difference in antibacterial potency between enantiomers.