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Structure–activity relationships in hydroxy-2,3-diarylxanthone antioxidants. Fa...
Santos, Clementina M.M.; Silva, Artur; Filipe, Paulo; Santus, René; Patterson, Larry K.; Maziére, Jean-Claude; Cavaleiro, José; Morlière, PatriceA structure–activity relationship has been established for eight hydroxy-2,3-diarylxanthones (XH) bearing hydroxy groups on the two aryl rings. One-electron oxidation by superoxide radical-anions ( O2 -) and Trp radicals as well as reaction with CCl3O2 and CHCl2O2 radicals demonstrates that two OH groups are required for efficient antioxidant reactivity in cetyltrimethylammonium bromide micelles. Hydroxy gro...
Structure–activity relationships in hydroxy-2,3-diarylxanthone antioxidants. Fa...
Santos, Clementina M.M.; Silva, Artur; Filipe, Paulo; Santus, René; Patterson, Larry K.; Maziére, Jean-Claude; Cavaleiro, José; Morliere, PatriceA structure–activity relationship has been established for eight hydroxy-2,3-diarylxanthones (XH) bearing hydroxy groups on the two aryl rings. One-electron oxidation by superoxide radical-anions (ΣO2 -) and ΣTrp radicals as well as reaction with ΣCCl3O2 and ΣCHCl2O2 radicals demonstrates that two OH groups are required for efficient antioxidant reactivity in cetyltrimethylammonium bromide micelles. Hydroxy gro...
Polyhydroxy-2,3-diarylxanthones as antioxidants
Santos, Clementina M.M.; Morliere, Patrice; Silva, Artur; Maziére, Jean-Claude; Cavaleiro, José; Santús, RenéXanthones are a class of oxygenated heterocyclic compounds widely occurring in nature.[1] The biological properties of these compounds have been extensively reported in the literature and one of the most promising is their potential application as antioxidant agents.[2] This fact led us to start a programme on the synthesis of 2,3-diarylxanthones bearing hydroxyl groups in certain positions of their skeleton fo...
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