Substituted 2- and 4-benzylpyridines in the synthesis of benzo[g]quinolines and benzo[g]isoquinolines

Nitrogen-containing heterocyclic analogs of anthracene, viz., benzo[g]isoquinolines and benzo[g]quinolines, were obtained by dehydrocyclization on a K-16 catalyst of mixtures of methyl-substituted 2- and 4-benzylpyridines with methyl groups in various positions of the pyridine and benzyl rings, which are formed by benzylation of β-picoline, as well as pyridine, by the Ladenburg method. The spectral characteristics of the synthesized compounds are presented. © 1980 Plenum Publishing Corporation.