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Updated: Aug 30, 2025

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
Published on: August 18, 2012
Para-Substituted O-Benzyl Sulfohydroxamic Acid Derivatives as Redox-Triggered Nitroxyl (HNO) Sources
Yueming Long1, Zijun Xia1, Allison M Rice1
1Department of Chemistry, Wake Forest University, Winston-Salem, NC 27101, USA.
Researchers developed new nitroxyl donors for studying its unique biological roles. These compounds release nitroxyl via redox reactions, aiding research into redox biology and nitroxyl
Area of Science:
- Chemistry
- Biochemistry
- Physiology
Background:
- Nitroxyl (HNO) exhibits distinct biological activity compared to nitric oxide and hydrogen sulfide.
- Nitroxyl's electrophilic reaction with thiols is central to its biological functions.
- Studying nitroxyl's chemistry and biology requires effective nitroxyl donor compounds.
Purpose of the Study:
- To synthesize and evaluate novel redox-triggered nitroxyl donor molecules.
- To investigate the mechanism of nitroxyl release from newly developed compounds.
Main Methods:
- Synthesis of O-benzyl-substituted sulfohydroxamic acid derivatives via condensation reactions.
- Utilizing gas chromatographic headspace analysis to detect nitrous oxide (N2O), a marker for nitroxyl formation.
- Employing reduction and oxidation strategies to trigger nitroxyl release.
Main Results:
- New nitroxyl donors were prepared with yields ranging from 27-79% and high purity.
- Nitrous oxide formation was confirmed upon reduction of nitro and azide-containing derivatives (25-92% yield).
- Oxidation of a boronate derivative yielded nitrous oxide (23%), supporting the proposed 1,6-elimination mechanism.
Conclusions:
- The synthesized compounds effectively generate nitroxyl through redox-triggered 1,6-elimination via Piloty's acid derivatives.
- These novel nitroxyl sources serve as valuable tools for exploring nitroxyl's functions in redox biology.
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