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Acta Cryst. (2013). E69, o1062-o1063  [ doi:10.1107/S1600536813015146 ]

Ethyl 8''-chloro-1'-methyl-2,12''-dioxo-12''H-dispiro[indoline-3,2'-pyrrolidine- 3',6''-indolo[2,1-b]quinazoline]-4'-carboxylate

P. S. Kannan, S. Lanka, S. Thennarasu, E. Govindan and A. SubbiahPandi

Abstract: In the title compound, C29H23ClN4O4, the quinazoline-indole system and the indolin-2-one system are each essentially planar, with maximum deviations from their mean planes of 0.150 (2) and 0.072 (2) Å, respectively. The central pyrrolidine ring adopts a twisted conformation on the C-C bond involving the spiro C atoms. Its mean plane forms dihedral angles of 83.37 (9) and 86.56 (8)°, respectively, with the indole rings of the indolin-2-one and quinazoline-indole systems. In the crystal, molecules are linked via pairs of N-H...O hydrogen bonds, forming inversion dimers. The dimers are linked via C-H...O hydrogen bonds, forming chains propagating along [001].


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