Research Article: Ethyl (E)-3-[1′-ethyl-2-oxo-4′-(phenyl­sulfon­yl)-2H-spiro­[acenaphthyl­ene-1,2′-pyrrolidine]-3′-yl]acrylate

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Ulaganathan Sankar, R. Uma, S. Sundaramoorthy, D. Velmurugan.


In the title compound, C28H27NO5S, the five-membered pyrrolidine ring, which exhibits an envelope conformation (the C atom at the spiral junction being the flap atom), makes dihedral angles of 57.37 (10) and 86.84 (8)°, respectively, with the phenyl ring and the acenaphthyl­ene ring system. In the crystal, mol­ecules associate via two C—H⋯O hydrogen bonds, forming R22(20) and R22(10) graph-set motifs.

Partial Text

For the biological activity of spiro compounds, see: Kobayashi et al. (1991 ▶); James et al. (1991 ▶); Obniska et al. (2003 ▶); Peddi et al. (2004 ▶). For ring conformational analysis, see: Cremer & Pople (1975 ▶).