1-[3-(Morpholin-4-yl)propyl]-4-(3-nitrophenyl)spiro[azetidine-3, 9?-xanthen]-2-one

Abstract

The ?-lactam (azetidin-2-one) ring of the title compound, C 28H27N3O5, is nearly planar [maximum deviation = 0.010 (1) Å] and makes dihedral angles of 75.77 (5), 52.78 (9) and 88.72 (5)°, respectively, with the benzene ring, the least-squares plane formed by the four C atoms of the morpholine ring, which adopts a chair conformation, and the xanthene ring system. In the crystal, C - H?O hydrogen-bond contacts connect neighbouring molecules into infinite zigzag chains running parallel to the b axis.