3-(2,4-Dichlorophenoxy)-1-(4-methoxyphenyl)-4-(3-nitrophenyl)azetidin-2-one

In the title compound, C22H16Cl2N2O5, the nearly planar four-membered β-lactam ring [maximum deviations of 0.011 (2) for the N atom] makes dihedral angles of 68.34 (13), 83.04 (13) and 3.37 (13)° with the dichloro-, nitro- and methoxyphenyl rings, respectively. The crystal structure is stabilized by C—H...O hydrogen-bond interactions. In addition, a π–π stacking interaction [centroid–centroid distance = 3.6622 (12) ] is observed between the β-lactam and nitrophenyl rings.