TY - JOUR T1 - AU - Karimova, E.R., AU - Baltina, L.A., AU - Spirikhin, L.V., AU - Kondratenko, R.M., AU - Farkhutdinov, R.R., AU - Petrova, I.V., Y1 - 2018-02-27 UR - https://repo.bashgmu.ru/publication/680 N2 - 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.