1-Ethyl-4′-(1H-indol-3-ylcarbonyl)-1′-methyl-2,2′′-dioxodispiro[indoline-3,2′-pyrrolidine-3′,3′′-indoline]-4′-carbonitrile dimethyl sulfoxide monosolvate

Abstract

In the title compound, C31H25N5O3·C2H6OS, the three indole/indoline units are all essentially planar with maximum deviations of 0.0172 (3), 0.053 (2) and 0.07 (2) Å. The pyrrolidine ring adopts an envelope conformation with the C atoms bearing the 1-ethyl-2-oxoindole substituent (in which the five-membered ring adopts a twisted conformation) as the flap. The dimethyl sulfoxide solvent molecule is disordered over two positions, with an occupancy factor ratio of 0.871 (4):0.129 (4). The solvent components are linked to the heterocyclic molecule via C—H...O and C—H...S hydrogen bonds. In the crystal, the solvent components are linked to the heterocyclic molecule via C—H...O and C—H...S interactions, forming R22(10) ring motifs. The molecules are further connected into a chain along the a-axis direction via N—H...O hydrogen bonds.