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J Med Chem ; 66(7): 5079-5098, 2023 04 13.
Article in English | MEDLINE | ID: mdl-37001025

ABSTRACT

Nα-2-thiophenoyl-d-phenylalanine-2-morpholinoanilide [MMV688845, Pathogen Box; Medicines for Malaria Venture; IUPAC: (2R)-N-(1-((2-morpholinophenyl)amino)-1-oxo-3-phenylpropan-2-yl)thiophene-2-carboxamide)] is a hit compound, which shows activity against Mycobacterium abscessus (MIC90 6.25-12.5 µM) and other mycobacteria. This work describes derivatization of MMV688845 by introducing a thiomorpholine moiety and the preparation of the corresponding sulfones and sulfoxides. The molecular structures of three analogs are confirmed by X-ray crystallography. Conservation of the essential R configuration during synthesis is proven by chiral HPLC for an exemplary compound. All analogs were characterized in a MIC assay against M. abscessus, Mycobacterium intracellulare, Mycobacterium smegmatis, and Mycobacterium tuberculosis. The sulfone derivatives exhibit lower MIC90 values (M. abscessus: 0.78 µM), and the sulfoxides show higher aqueous solubility than the hit compound. The most potent derivatives possess bactericidal activity (99% inactivation of M. abscessus at 12.5 µM), while they are not cytotoxic against mammalian cell lines.


Subject(s)
Mycobacterium Infections, Nontuberculous , Mycobacterium abscessus , Mycobacterium tuberculosis , Animals , Amides , Anti-Bacterial Agents/pharmacology , Anti-Bacterial Agents/chemistry , Mammals , Microbial Sensitivity Tests , Mycobacterium Infections, Nontuberculous/microbiology
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