Abstract: | On catalytic reduction of 2,6-diphenylpyrylium salts, hydrogenolysis occurs at the C–O bond with the formation of 1,5-diphenylpentanes. The principal direction of the hydrogenation of 9-phenyl-sym-octahydroxanthylium tetrafluoroborate is the formation of a mixture of products of partial and complete reduction of the heterocycle. The structure of the substances obtained was established by IR and13C NMR spectroscopy.N. G. Chernyshevskii Saratov State University, Saratov 410026, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 614–617, May, 1998. |