RT - Article SR - Electronic T1 - SP - 2018-02-27 A1 - Karimova, E.R., A1 - Baltina, L.A., A1 - Spirikhin, L.V., A1 - Kondratenko, R.M., A1 - Farkhutdinov, R.R., A1 - Petrova, I.V., YR - 2015 UL - https://repo.bashgmu.ru/publication/680 AB - Quercetin (Q) methyl ethers were synthesized from CH3I under various conditions. The principal products from the reactions of Q with alkylhalides (CH3I, C4H9Br) in DMF were 3,7,4′-tri-O-alkyl ethers. The structures of the products were confirmed by PMR and 13C NMR spectra. The antioxidant activity of Q tetra- and tri-O-methyl ethers was demonstrated by chemiluminescence in model systems generating active oxygen species and promoting lipid peroxidation.