Ethyl 2‐amino‐4‐(2,4‐di­chloro­phenyl)‐4H‐benzo­[f]­chromene‐3‐carboxyl­ate

The title compound, C22H17Cl2NO3, was synthesized by the reaction of 2-naphthol with 2,4-di­chloro­benz­aldehyde and ethyl cyano­acetate in ethanol in the presence of KF/Al2O3 as catalyst. X-ray analysis reveals that the pyran ring adopts a boat conformation. In the crystal structure, the amino group is involved in both intra- and intermolecular N—H⋯O hydrogen bonds.