6-(4-Meth-oxy-phen-yl)-6a-nitro-6,6a,6b,7,8,9,10,12a-octa-hydro-spiro-[chromeno[3,4-a]indolizine-12,3'-indolin]-2'-on
Seenivasan Karthiga Devi1, Thothadri Srinivasan, Jonnalagadda Naga Siva Rao
1Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
Abstract:
In the title compound, C29H27N3O5, the hydropyran ring adopts an envelope conformation with the methine C atom bearing the para-meth-oxy-benzene ring as the flap. The central pyrrolidine ring has a twist conformation on the N-C bond involving the spiro C atom. The piperidine ring adopts a chair conformation. An intra-molecular C-H⋯O contact closes an S(7) ring. In the crystal, inversion dimers linked by C-H⋯O inter-actions generate R 2 (2)(18) loops and N-H⋯O hydrogen bonds connect the dimers into [100] chains.
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