The 21st century has seen a dramatic acceleration in the evolution of bacterial resistance. Many classes of commercial antibiotics, including most current commercial β-lactams, were structurally optimized to counter 20th century pathogens. The carbapenems represent the most potent and broadest spectrum of the β-lactams, representing crucial last line agents to treat lifethreatening infections. While the 21st century has seen the appearance of carbapenem-resistant strains, the basic substitution pattern of commercial carbapenem antibiotics has remained constant, other than minor modifications at the C2 position. This research will investigate whether substitution at an atypical carbapenem position, the C5 position, can improve the antibiotic’s potency against resistant pathogens, particularly including Mycobacterium tuberculosis, Mycobacterium abscessus and Acinetobacter baumannii. This project produced improved synthetic methodology to generate this atypically substituted class of carbapenem, helped define the effect of substituents at this position on the carbapenemase susceptibility and binding to transpeptidase targets, and demonstrated that selected C5-substituted carbapenems can be superior to current commercial carbapenem antibiotics against clinically important pathogen.
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Al-Kharji, Noora Mohammed S.A, "Design, Synthesis, and Evaluation of C5 Substituted Carbapenem Antibiotics To Counter Resistant Pathogens" (2018). Chemistry Theses and Dissertations. 8.