Ethyl 27-oxo-15-oxa-2,20-diaza-hexa-cyclo-[18.6.1.0(1,8).0(2,6).0(9,14).0(21,26)]hepta-cosa-9,11,13,21,23,25-hexa-ene-7-carboxyl-ate.

Sibi Narayanan,Raghavachary Raghunathan,Thothadri Srinivasan,Santhanagopalan Purushothaman,Devadasan Velmurugan

doi:10.1107/s1600536812049082

Sibi Narayanan, Raghavachary Raghunathan + Show 3 more

Open Access

https://doi.org/10.1107/s1600536812049082

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Abstract

In the title compound, C27H30N2O4, the pyrrolidine ring adopts a twisted conformation. The indoline ring system is almost perpendicular to the mean plane of the pyrrolidine ring, making a dihedral angle of 81.7 (8)°. In the crystal, molecules are linked into centrosymmetric dimers with graph-set motif R 2 2(16) via pairs of C—H⋯O hydrogen bonds. The terminal ethyl group of the ester group is disordered over two sets of sites, with a site-occupancy ratio of 0.587 (11):0.413 (11).

Highlights

In the title compound, C27H30N2O4, the pyrrolidine ring adopts a twisted conformation
The indoline ring system is almost perpendicular to the mean plane of the pyrrolidine ring, making a dihedral angle of 81.7 (8)
Molecules are linked into centrosymmetric dimers with graphset motif R22(16) via pairs of C—H O hydrogen bonds

Summary

Structure Reports

Key indicators: single-crystal X-ray study; T = 293 K; mean (C–C) = 0.002 Å; disorder in main residue; R factor = 0.045; wR factor = 0.125; data-to-parameter ratio = 17.6

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Raghunathan and Devadasan Velmurugan

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