Experimental

In the title compound, C28H29NO3, the fused pyrrolidine and piperidine rings of the octahydroindolizine unit exhibit envelope and chair conformations, respectively. The dihedral angle between the naphthalene ring system and the benzene ring is 40.37 (5)°. The crystal packing is stabilized by weak intermolecular C—H⋯O interactions.

In the title compound, C 28 H 29 NO 3 , the fused pyrrolidine and piperidine rings of the octahydroindolizine unit exhibit envelope and chair conformations, respectively. The dihedral angle between the naphthalene ring system and the benzene ring is 40.37 (5) . The crystal packing is stabilized by weak intermolecular C-HÁ Á ÁO interactions.
BG thanks AMET University management, India, for their kind support. BG also acknowledge SAIF, IITMadras, India, for the data collection.

Comment
The synthesis of biologically active indolizine derivatives continues to attract the attention of organic chemists, because of their wide spectrum of biological activity. Indolizine derivatives have been found to possess a variety of biological activities such as antiinflammatory (Malonne et al., 1998), antiviral (Medda et al., 2003), aromatase inhibitory (Sonnet et al., 2000), analgestic (Campagna et al., 1990) and antitumor (Pearson & Guo, 2001) activities.
The geometric parameters of the title compound ( Fig. 1) agree well with reported similar structures (Gunasekaran et al., 2009;Kamala et al., 2009). The mean plane of the naphthalene ring system makes a dihedral angle of 40.37 (5)° with the methyl benzene ring. In the molecule the pyrrolidine ring N1/C13/C12/C19/C18 exhibits an envelope conformation with envelope on C13 with an asymmetry parameter (Nardelli, 1983) ΔC s (C13) = 14.17 (3) and with the puckering parameters (Cremer & Pople, 1975)   were refluxed in benzene for 20 h and the solvent was removed under reduced pressure. The crude product was subjected to column chromatography to get the pure product. Chloroform and methanol (1:1) solvent mixture was used for the crystallization under slow evaporation method.

Refinement
H atoms were positioned geometrically and refined using riding model, with C-H = 0.93 Å and U iso (H) = 1.2U eq (C) for aromatic C-H, C-H = 0.98 Å and U iso (H) = 1.2U eq (C) for C-H, C-H = 0.97 Å and U iso (H) = 1.2U eq (C) for CH 2 , and C-H = 0.96 Å and U iso (H) = 1.5U eq (C) for CH 3 . Fig. 1. The molecular structure of (I), with atom labels and 30% probability displacement ellipsoids for non-H atoms.