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Acta Cryst. (2013). E69, o822
[ doi:10.1107/S1600536813011525 ]

Ethyl 1''-benzyl-1'-methyl-2''-oxodispiro[indeno[1,2-b]quinoxaline-11,3'-pyrrolidine-2',3''-indoline]-4'-carboxylate

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

Abstract: In the title compound, C36H30N4O3, the quinoxaline-indene system is roughly planar, with a maximum deviation from the mean plane of 0.218 Å for the C atom shared with the central pyrrolidine ring. This latter ring forms dihedral angles of 84.54 (7) and 83.91 (8)° with the quinoxaline-indene system and the indole ring, respectively. The central pyrrolidine ring has an envelope conformation with the N atom as the flap, while the pyrrolidine and five-membered rings of the indole group adopt twisted conformation and envelope (with the C atom bearing the quinoxaline-indene system as the flap) conformations, respectively. In the crystal, molecules are linked via weak C-H...N hydrogen bonds, forming a chain running along [100].


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