4-Aryl(benzyl)amino-4-heteroarylbut-1-enes as building blocks in heterocyclic synthesis. 4. Synthesis of 4, 6-dimethyl-5-nitro(amino)-2-pyridylquinolines and their antiparasitic activities.

New nitro- and aminoquinoline derivatives containing a pyridyl nucleus were synthesized from 6, 8-disubstituted 4-methyl-2-pyridylquinolines, which were prepared from N-pyridylmethylidenanilines. The anti-chagasic and trichomonacidal in vitro activity, as well as the cytotoxic properties towards macrophages of some of these compounds were evaluated. Although some of the compounds showed only moderate activity it was possible to establish some structure-activity relationships.