Synthesis and evaluation of pretomanid (PA-824) oxazolidinone hybrids.

Abstract:

:Pretomanid (PA-824) is an important nitroimidazole antitubercular agent in late stage clinical trials. However, pretomanid is limited by poor solubility and high protein binding, which presents opportunities for improvement in its physiochemical properties. Conversely, the oxazolidinone linezolid has excellent physicochemical properties and has recently shown impressive activity for the treatment of drug resistant tuberculosis. In this study we explore if incorporation of the outer ring elements found in first and second generation oxazolidinones into the nitroimidazole core of pretomanid can be used to improve its physicochemical and antitubercular properties. The synthesis of pretomanid outer oxazolidinone ring hybrids was successfully performed producing hybrids that maintained antitubercular activity and had improved in vitro physicochemical properties. Three lead compounds were identified and evaluated in a chronic model of tuberculosis infection in mice. However, the compounds lacked efficacy suggesting that portions of PA-824 tail not found in the hybrid molecules are required for in vivo efficacy.

journal_name

Bioorg Med Chem Lett

authors

Rakesh,Bruhn DF,Scherman MS,Singh AP,Yang L,Liu J,Lenaerts AJ,Lee RE

doi

10.1016/j.bmcl.2015.12.002

subject

Has Abstract

pub_date

2016-01-15 00:00:00

pages

388-391

issue

2

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(15)30315-2

journal_volume

26

pub_type

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