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

Acta Crystallogr Sect E Struct Rep Online. 2013 Jan 1;69(Pt 1):o23-4. doi: 10.1107/S1600536812049082. Epub 2012 Dec 5.

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, mol-ecules are linked into centrosymmetric dimers with graph-set motif R2(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).