Synthesis and spectral properties of furyl-substituted pyridines and pyrylium and pyridinium salts

2,6-Diphenyl-4-(5-R-2-furyl) pyrylium and 2,4-diphenyl-6-(5-bromo-2-furyl) pyrylium perchlorates and the corresponding pyridines and 1-methylpyridinium perchlorates were synthesized. On the basis of the UV and PMR spectra it was concluded that there is significant electronic interaction of the furylium substituent with the pyrylium and pyridinium cations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1320–1324, October, 1988.