Abstract
In the title compound, C22H21N3O4, the central pyrrolidine ring adopts an envelope conformation with the N atom in the flap position. The indoline ring systems are almost perpendicular to the mean plane of the pyrrolidine ring, making dihedral angles of 86.4 (8) and 83.1 (8)°. The acetate group attached to the pyrrolidine ring assumes an extended conformation. In thecrystal, N—H⋯O hydrogen bonds result in the formation of a C(7) chain running along [100]. The crystal packing also features π–π interactions [centroid–centroid distance = 3.2032 (11) Å].
Highlights
Crystal dataMethyl (3R*,30 S*)-10 ,10 0 -dimethyl-2,20 0 dioxodispiro[indoline-3,20 -pyrrolidine30 ,30 0 -indoline]-40 -carboxylate
In the title compound, C22H21N3O4, the central pyrrolidine ring adopts an envelope conformation with the N atom in the flap position
The indoline ring systems are almost perpendicular to the mean plane of the pyrrolidine ring, making dihedral angles of 86.4 (8) and 83.1 (8)
Summary
Methyl (3R*,30 S*)-10 ,10 0 -dimethyl-2,20 0 dioxodispiro[indoline-3,20 -pyrrolidine30 ,30 0 -indoline]-40 -carboxylate. 103, India, bIndustrial Chemistry Laboratory, Central Leather Research Institute, Adyar, Chennai 600 020, India, and cDepartment of Physics, Presidency College (Autonomous), Chennai 600 005, India. R factor = 0.043; wR factor = 0.110; data-to-parameter ratio = 13.9
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