An intermediate for chloroquine analogs: (E)-2-(4,7-dichloro-2-quinolinyl)-3-(dimethylamino)-2-propenal.

The title compound C14H12C12N2O, has been shown to have an E configuration about the double bond in the propenal moiety. Significant delocalization of the lone pair on the N atom of the dimethylamino group into the pi system of this moiety is indicated by the planarity about this N atom.