Synthesis and Electrochemistry of 2-Ethenyl and 2-Ethanyl Derivatives of 5-Nitroimidazole and Antimicrobial Activity against Giardia lamblia
摘要:
Infections with the diarrheagenic pathogen, Giardia lamblia, are commonly treated with the 5-nitroimidazole (5-NI) metronidazole (Mz), and yet treatment failures and Mz resistance occur. Using a panel of new 2-ethenyl and 2-ethanyl 5-NI derivatives, we found that compounds with a saturated bridge between the 5-NI core and a pendant ring system exhibited only modestly increased antigiardial activity and could not overcome Mz resistance. By contrast, olefins with a conjugated bridge connecting the core and a substituted phenyl or heterocyclic ring showed greatly increased antigiardial activity without toxicity, and several overcame Mz resistance and were more effective than Mz in a murine giardiasis model. Determination of the half-wave potential of the initial one-electron transfer by cyclic voltammetry revealed that easier redox activation correlated with greater antigiardial activity and capacity to overcome Mz resistance. These studies show the potential of combining systematic synthetic approaches with biological and electrochemical evaluations in developing improved 5-NI drugs.
[EN] EXPANDED THERAPEUTIC POTENTIAL IN NITROHETEROARYL ANTIMICROBIALS<br/>[FR] POTENTIEL THÉRAPEUTIQUE ÉTENDU DANS DES ANTIMICROBIENS À NITROHÉTÉROARYLE
申请人:UNIV CALIFORNIA
公开号:WO2014205414A1
公开(公告)日:2014-12-24
Disclosed herein are antimicrobial compounds compositions, pharmaceutical compositions, the use and preparation thereof. Some embodiments relate to imidazole, thiazole, and furan derivatives and their use as therapeutic agents.
EXPANDED THERAPEUTIC POTENTIAL IN NITROHETEROARYL ANTIMICROBIALS
申请人:The Regents of the University of California
公开号:US20160244435A1
公开(公告)日:2016-08-25
Disclosed herein are antimicrobial compounds compositions, pharmaceutical compositions, the use and preparation thereof. Some embodiments relate to imidazole, thiazole, and furan derivatives and their use as therapeutic agents.
PHENYLETHENYL OR PHENYLETHINYL DERIVATIVES AS GLUTAMATE RECEPTOR ANTAGONISTS
申请人:F. Hoffmann-La Roche AG
公开号:EP1349839B1
公开(公告)日:2005-02-09
Synthesis and Electrochemistry of 2-Ethenyl and 2-Ethanyl Derivatives of 5-Nitroimidazole and Antimicrobial Activity against <i>Giardia lamblia</i>
作者:Carlos A. Valdez、Jonathan C. Tripp、Yukiko Miyamoto、Jaroslaw Kalisiak、Petr Hruz、Yolanda S. Andersen、Sabrina E. Brown、Karina Kangas、Leo V. Arzu、Barbara J. Davids、Frances D. Gillin、Jacqueline A. Upcroft、Peter Upcroft、Valery V. Fokin、Diane K. Smith、K. Barry Sharpless、Lars Eckmann
DOI:10.1021/jm900356n
日期:2009.7.9
Infections with the diarrheagenic pathogen, Giardia lamblia, are commonly treated with the 5-nitroimidazole (5-NI) metronidazole (Mz), and yet treatment failures and Mz resistance occur. Using a panel of new 2-ethenyl and 2-ethanyl 5-NI derivatives, we found that compounds with a saturated bridge between the 5-NI core and a pendant ring system exhibited only modestly increased antigiardial activity and could not overcome Mz resistance. By contrast, olefins with a conjugated bridge connecting the core and a substituted phenyl or heterocyclic ring showed greatly increased antigiardial activity without toxicity, and several overcame Mz resistance and were more effective than Mz in a murine giardiasis model. Determination of the half-wave potential of the initial one-electron transfer by cyclic voltammetry revealed that easier redox activation correlated with greater antigiardial activity and capacity to overcome Mz resistance. These studies show the potential of combining systematic synthetic approaches with biological and electrochemical evaluations in developing improved 5-NI drugs.