Cyclic homopentapeptides. 1. Analogs of tuberactinomycins and capreomycin with activity against vancomycin-resistant enterococci and Pasteurella

Abstract A 6a-(3′,4′-dichlorophenylamino) analog of viomycin was uncovered by a high-throughput screen against the animal health pathogen Pasteurella haemolytica , and has served as a novel lead structure for our infectious disease programs. We report herein the synthesis and activity of analogs of tuberactinomycins and capreomycin that are active against Pasteurella spp., methicillin-resistant Staphylococcus aureus , and vancomycin-resistant enterococci. This paper describes the synthesis and activity of some C-6a-substituted analogs of tuberactinomycins and capreomycin, which are active against Pasteurella spp., methicillin-resistant Staphylococcus aureus , and vancomycin-resistant enterococci.