Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 4 (April 2013)


organic compounds



su2563 scheme

Acta Cryst. (2013). E69, o466    [ doi:10.1107/S1600536813005436 ]

(1'S,12'R,13'S,17'S)-15',15'-Dimethyl-1,2-dihydro-11',14',16',18'-tetraoxa-7'-azaspiro[indole-3,8'-pentacyclo[10.6.0.02,9.03,7.013,17]octadecane]-2,10'-dione

V. Sabari, R. Ponnusamy, R. Prasanna, R. Raghunathan and S. Aravindhan

Abstract: In the title compound, C22H24N2O6, the indole ring has a twist conformation and the tetrahydro-2H-pyran-2-one ring a half-chair conformation. One of the pyrrolidine rings adopts an envelope conformation on the N atom, while the other has a twist conformation; the `butterfly' angle between their mean planes is 62.98 (11)°. The dioxolane ring adopts a twist conformation and the tetrahydrofuran ring has an envelope conformation on the C atom in the fused tetrahydro-2H-pyran-2-one ring adjacent to the O atom of the tetrahydrofuran ring. The `butterfly' angle between the mean planes of these two five-membered rings is 69.14 (10)°. In the crystal, molecules are linked by N-H...O hydrogen bonds, forming chains along the a axis.


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