Compounds, preferably 5-pyrimidinol and 3-pyridinol derivatives, that act as effective chain breaking antioxidants of both the lipid and water-soluble variety (analogous to the natural Vitamins E and C), many of which are more reactive toward peroxyl radicals than the most potent form of Vitamin E. These compounds may exhibit many chemopreventive effects associated with conditions in which free radical-mediated cellular damage or disruption is implicated and Vitamins E and C are shown to have protective effects. Additionally, these compounds should be excellent oxidation inhibitors as additives to fuels, lubricants, rubber, polymers, chemicals, solvents and foodstuffs.
Unexpected Acid Catalysis in Reactions of Peroxyl Radicals with Phenols
作者:Luca Valgimigli、Riccardo Amorati、Silvia Petrucci、Gian Franco Pedulli、Di Hu、Jason J. Hanthorn、Derek A. Pratt
DOI:10.1002/anie.200903360
日期:2009.10.19
increase the reactivity of peroxyl radicals with common phenolic antioxidants dramatically. This counterintuitive phenomenon relies on a substantially different reaction mechanism from that in the absence of an acid: rate‐determining electron transfer occurs from the hydrogen‐bonded phenol to the hydroperoxide cation radical present in equilibrium with the peroxyl radical under these conditions (see scheme)
Compounds, preferably 5-pyrimidinol and 3-pyridinol derivatives, that act as effective chain breaking antioxidants of both the lipid and water-soluble variety (analogous to the natural Vitamins E and C), many of which are more reactive toward peroxyl radicals than the most potent form of Vitamin E. These compounds may exhibit many chemopreventive effects associated with conditions in which free radical-mediated cellular damage or disruption is implicated and Vitamins E and C are shown to have protective effects. Additionally, these compounds should be excellent oxidation inhibitors as additives to fuels, lubricants, rubber, polymers, chemicals, solvents and foodstuffs.
Compounds, preferably 5-pyrimidinol and 3-pyridinol derivatives, that act as effective chain breaking antioxidants of both the lipid and water-soluble variety (analogous to the natural Vitamins E and C), many of which are more reactive toward peroxyl radicals than the most potent form of Vitamin E. These compounds may exhibit many chemopreventive effects associated with conditions in which free radical-mediated cellular damage or disruption is implicated and Vitamins E and C are shown to have protective effects. Additionally, these compounds should be excellent oxidation inhibitors as additives to fuels, lubricants, rubber, polymers, chemicals, solvents and foodstuffs.
Eine Zweikomponenten-Mörtelmasse umfasst eine härtbare Harzkomponente und eine getrennt angeordnete Härterkomponente, wobei die härtbare Harzkomponente ein radikalisch polymerisierbares Harz, einen phenolischen Inhibitor und einen Gelierzeitstabilisator mit wenigstens einer Säurefunktionalität umfasst, und wobei die Härterkomponente ein Peroxid umfasst.
Ferner wird eine Zweikomponenten-Mörtelmasse mit einem säurefunktionalisierten radikalisch polymerisierbarem Harz angegeben.