Cyclocondensation of ethyl 3,3-diaminoacrylate with aromatic ketones and nitriles containing a labile halogen atom in the ortho position

The cyclocondensation of aromatic o-halo ketones and o-halo nitriles with ethyl 3,3-diaminoacrylate proceeds as the replacement of the aromatic halogen by the α-carbon atom of the enediamine, while the amino group of the enediamine is bound by the α-carbon atom of the ketone or nitrile group.