Synthesis and properties of N-hetarylpyridinium salts

Methods for the synthesis of N-hetarylpyridinium perchlorates are examined. The basicity constants of a number of the indicated compounds were measured. It is shown that 2,4,6-trimethyl- and 2,4,6-triphenylpyridinium cations lower the electron density in N-hetarylpyridinium salts. N-Acyl derivatives of 1-(2-benzimidazolylalkyl)-2,4,6-triphenylpyridinium perchlorates were obtained. The corresponding ylids were obtained from 1-(5-tetrazolyl)- and 1-(2-benzimidazolyl)-2,4,6-triphenylpyridinium perchlorates.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 944–949, July, 1978.