Catalytic synthesis of 1,2-azole and pyridine derivatives of 1,8-dioxooctahydroxanthenes using FIBAN K-1 fibrous sulfonic cation exchanger
Akishina E.A., Dikusar E.A., Polikarpov A.P., Alekseeva K.A., Menshikova D.I., Kurman P.V., Potkin V.I.
Abstract
Arylmethylenebis(3-hydroxy-2-cyclohexen-1-ones) were obtained by condensation of 1,2-azole- and pyridine-substituted aromatic aldehydes of the vanillin series with 1,3-cyclohexanedione in methanol in the presence of trimethylamine. Catalytic cyclization using fibrous sulfocationite FIBAN K-1 gave corresponding 1,8-dioxooctahydroxanthenes.