Influence of substituent heteroatoms on the cytoprotective properties of pyrimidinol antioxidants

Arnaud Chevalier, Omar Khdour, Margaret Schmierer, Indrajit Bandyopadhyay, Sidney Hecht

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Recently, we described the optimization of novel pyrimidinol-based antioxidants as potential therapeutic molecules for targeting mitochondrial diseases. That study focused on improving the potency and metabolic stability of pyrimidinol antioxidants. This led us to consider the possibility of altering the positions of the exocyclic alkoxy and alkylamino substituents on the pyrimidinol scaffold. Twelve new analogues were prepared and their biological activities were investigated. The metabolic stability of the prepared regioisomers was also assessed in vitro using bovine liver microsomes. Unexpectedly, the 2-alkoxy-4-alkylamino substituted pyrimidinol antioxidants were found to have properties in protecting mitochondrial function superior to the isomeric 4-alkoxy-2-alkylamino substituted pyrimidinols evaluated in all earlier studies. This observation suggests a possible mode of action involving the intermediacy of an ortho-iminoquinone, a species not previously associated with mitochondrial respiratory chain function.

Original languageEnglish (US)
Pages (from-to)1703-1716
Number of pages14
JournalBioorganic and Medicinal Chemistry
Issue number5
StatePublished - 2017


  • Lipid peroxidation
  • Metabolic stability
  • Mitochondrial function
  • Reactive oxygen species
  • Respiratory chain substrates

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmaceutical Science
  • Drug Discovery
  • Clinical Biochemistry
  • Organic Chemistry


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