Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 3 (March 2013)

organic compounds

Acta Cryst. (2013). E69, o441    [ doi:10.1107/S1600536813004868 ]

A diastereomer of methyl (1R,3'S)-1',1''-dimethyl-2,2''-dioxo-2H-dispiro­[ace­naphthyl­ene-1,2'-pyrrolidine-3',3''-indoline]-4'-carboxyl­ate

G. Ganesh, P. S. Yuvaraj, P. S. Kannan, B. S. R. Reddy and A. SubbiahPandi

Abstract: In the title compound, C26H22N2O4, the central pyrrolidine ring adopts a twist conformation and the cyclo­pentane ring of the dihydro­acenapthylene group adopts an envelope conformation with the spiro C atom as the flap. The naphthalene ring system of the dihydro­acenaphthyl­ene group forms dihedral angles of 83.4 (9) and 61.3 (7)°, respectively, with the mean planes of the pyrrolidine and indole rings. The crystal packing is stabilized by inter­molecular C-H...O hydrogen bonds. The title compound is a diastereomer of a previously reported structure.

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