Annelated derivatives of 2-phenylquinoline, 2-(2′-pyridyl)quinoline and 2-phenyl-1,8-naphthyridine

Annelated derivatives of 2-phenylquinoline, 2-(2′-pyridyl)quinoline, and 2-phenyl-1,8-naphthyridine have been prepared where the bridging unit contains from one to four methylene units. The conformational properties of these molecules have been analyzed by ¹H nmr and uv spectroscopy as well as by pK_a determinations.