The conversion of an aniline to a 4-hydroxyquinoline by condensation with ethoxymethylenemalonic esterla has been extended to the conversion of, phenylenediamines and aminoquinolines to phenanthrolines. Substances of this type (compounds I, 11, 111) carrying the substituents present in SN-7618,'" 9* plasmochin, and other effective antimalarial agents, but having the additional heterocyclic ring, were ...