1-Methyl-1′-(4-methylphenyl)-2′,3′,5′,6′,7′,7a'-hexahydro-1′H-dispiro[piperidine-3,2′-pyrrolizine-3′,3′′-indoline]-4,2′′-dione

Abstract

The title compound, C26H29N3O2, crystallizes with two mol­ecules in the asymmetric unit, having C—H⋯O inter­actions between them and resulting in a dimer characterized by an R 2 2(11) motif. These dimers are linked into an ABABAB chain via N—H⋯O, N—H⋯N and C—H⋯O built edge-fused R 1 2(5) and R 2 2(7) motifs. This chain is linked to its inversion-related partner via N—H⋯O bonds with an R 2 2(8) motif and leads to a double chain extending along the b axis characterized by an R 6 6(36) motif across the inversion centres. The methyl group of the phenyl ring and the oxindole of mol­ecule A and B are involved in C—H⋯π inter­actions. One C atom of the pyrrolizine ring of mol­ecule A and its attached H atoms show positional disorder, the major and minor components being in the ratio 0.706 (7):0.294 (7).