1-(2-Hydroxyethyl)-1′-methyl-4′-(naph-thalen-1-yl)-1″, 2″,3″,4″-tetrahydro-dispiro[indoline-3,2′-pyrrolidine- 3′,2″-naphthalene]-2,1″-dione

Abstract

In the title compound, C 33H 30N 2O 3, the pyrrolidine ring adopts an envelope conformation in which the H atom attached the an ortho-C atom deviates from the plane, whereas the cyclo-hexa-none ring in the tetra-hydro-naphthalene fused-ring system adopts a sofa conformation. The oxindoline ring system is almost perpendicular with respect to the mean plane of the pyrrolidine ring, with a dihedral angle of 89.0 (1)°. Five intra-molecular C - H⋯O close contacts are observed. In the crystal, mol-ecules associate via O - H⋯O hydrogen bonds, forming R 22(14) dimers. In addition, there are weak C - H⋯π inter-actions.