Research Article: 1′,1′′-Dimethyl-4′-(naphthalen-1-yl)-1,2,3,4-tetra­hydro­naphthalene-2-spiro-3′-pyrrolidine-2′-spiro-3′′-indoline-1,2′′-dione

Date Published: April 01, 2011

Publisher: International Union of Crystallography

Author(s): S. Selvanayagam, K. Ravikumar, P. Saravanan, R. Raghunathan.


In the title compound, C32H28N2O2, the pyrrolidine ring adopts an envelope conformation, whereas the cyclo­hexa­none ring in the tetra­hydro­naphthalene fused-ring system adopts a half-chair conformation. The oxindole ring system is oriented at an angle of 48.2 (1)° with respect to the naphthyl ring system. An intra­molecular C—H⋯O close contact is observed. In the crystal, mol­ecules associate via two C—H⋯O hydrogen bonds, forming R22(14) and R22(10) dimers.

Partial Text

For general background to pyrrolidine derivatives, see: Obniska et al. (2003 ▶); Peddi et al. (2004 ▶); Kaminski & Obniska (2008 ▶); Stylianakis et al. (2003 ▶). For related structures, see: Selvanayagam et al. (2011 ▶); Gans & Shalloway (2001 ▶). For ring-puckering parameters, see: Cremer & Pople (1975 ▶) and for asymmetry parameters, see: Nardelli (1983 ▶).




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