Catalytic Chain-Breaking Pyridinol Antioxidants
Organic Letters2008Vol. 10(21), pp. 4895–4898
Citations Over TimeTop 23% of 2008 papers
Sangit Kumar, Henrik Johansson, Takahiro Kanda, Lars Engman, Thomas Müller, Mats Jönsson, Gian Franco Pedulli, Silvia Petrucci, Luca Valgimigli
Abstract
When assayed for their capacity to inhibit azo-initiated peroxidation of linoleic acid in a water/chlorobenzene two-phase system, tellurium-containing 3-pyridinols were readily regenerable by N-acetylcysteine contained in the aqueous phase. The best inhibitors quenched peroxyl radicals more efficiently than alpha-tocopherol, and the duration of inhibition was limited only by the availability of the thiol reducing agent. The compounds were also found to catalyze reduction of hydrogen peroxide in the presence of thiol reducing agent.
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