Journal of Medicinal Chemistry p. 2974 - 2977 (1995)
Update date:2022-09-26
Topics:
Renau, Thomas E.
Sanchez, Joseph P.
Shapiro, Martin A.
Dever, Julie A.
Gracheck, Stephen J.
Domagala, John M.
The dramatic increase in drug resistant Mycobacterium tuberculosis has caused a resurgence in research targeted toward these organisms.As part of a systematic study to optimize the quinolone antibacterials against mycobacteria, we have prepared a series of N-1-phenyl-substituted derivatives to explore the effect of increasing lipophilicity on potency at this position.The compounds, synthesized by the modification of a literature procedure, were evaluated for activity against Gram-negative and Gram-positive bacteria, Mycobacterium fortuitum and Mycobacterium smegmatis, and the results correlated with log P, pKa, and other attributes.The activity of the compounds against the rapidly growing, less hazardous organism M. fortuitum was used as a measure of M. tuberculosis activity.The results demonstrate that increasing lipophilic character by itself does not correlate with increased potency against mycobacteria.Rather, intrinsic activity against Gram-negative and/or Gram-positive bacteria is the governing factor for corresponding activity against mycobacteria.
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