Large-scale synthesis of a persistent trityl radical for use in biomedical EPR applications and imaging

Ilirian Dhimitruka, Murugesan Velayutham, Andrey A. Bobko, Valery V. Khramtsov, Frederick A. Villamena, Christopher M. Hadad, Jay L. Zweier

Research output: Contribution to journalArticle

Abstract

Tetrathiatriarylmethyl radicals are ideal spin probes for biological electron paramagnetic resonance (EPR) spectroscopy and imaging. The wide application of trityl radicals as biosensors of oxygen or other biological radicals was hampered by the lack of affordable large-scale syntheses. We report the large-scale synthesis of the Finland trityl radical using an improved addition protocol of the aryl lithium monomer to methylchloroformate. A new reaction for the formal one-electron reduction of trityl alcohols to trityl radicals using neat trifluoroacetic acid is reported as well. Initial applications show that the compound is very sensitive to molecular oxygen. It has already provided high-resolution EPR images on large aqueous samples and should be suitable for a broad range of in vivo applications.

Original languageEnglish (US)
Pages (from-to)6801-6805
Number of pages5
JournalBioorganic and Medicinal Chemistry Letters
Volume17
Issue number24
DOIs
StatePublished - Dec 15 2007
Externally publishedYes

Fingerprint

Electron Spin Resonance Spectroscopy
Paramagnetic resonance
Oxygen
Imaging techniques
Trifluoroacetic Acid
Biosensing Techniques
Finland
Lithium
Spectrum Analysis
Molecular oxygen
Alcohols
Electrons
Biosensors
Monomers
Spectroscopy

Keywords

  • EPR spectroscopy and imaging
  • TAM
  • Tetrathiatriarylmethyl
  • Trityl alcohol
  • Trityl radical

ASJC Scopus subject areas

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

Cite this

Dhimitruka, I., Velayutham, M., Bobko, A. A., Khramtsov, V. V., Villamena, F. A., Hadad, C. M., & Zweier, J. L. (2007). Large-scale synthesis of a persistent trityl radical for use in biomedical EPR applications and imaging. Bioorganic and Medicinal Chemistry Letters, 17(24), 6801-6805. https://doi.org/10.1016/j.bmcl.2007.10.030

Large-scale synthesis of a persistent trityl radical for use in biomedical EPR applications and imaging. / Dhimitruka, Ilirian; Velayutham, Murugesan; Bobko, Andrey A.; Khramtsov, Valery V.; Villamena, Frederick A.; Hadad, Christopher M.; Zweier, Jay L.

In: Bioorganic and Medicinal Chemistry Letters, Vol. 17, No. 24, 15.12.2007, p. 6801-6805.

Research output: Contribution to journalArticle

Dhimitruka, I, Velayutham, M, Bobko, AA, Khramtsov, VV, Villamena, FA, Hadad, CM & Zweier, JL 2007, 'Large-scale synthesis of a persistent trityl radical for use in biomedical EPR applications and imaging', Bioorganic and Medicinal Chemistry Letters, vol. 17, no. 24, pp. 6801-6805. https://doi.org/10.1016/j.bmcl.2007.10.030
Dhimitruka, Ilirian ; Velayutham, Murugesan ; Bobko, Andrey A. ; Khramtsov, Valery V. ; Villamena, Frederick A. ; Hadad, Christopher M. ; Zweier, Jay L. / Large-scale synthesis of a persistent trityl radical for use in biomedical EPR applications and imaging. In: Bioorganic and Medicinal Chemistry Letters. 2007 ; Vol. 17, No. 24. pp. 6801-6805.
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