Ethyl 7′-(6-benz-yloxy-2,2-dimethyl-tetra-hydro-furo[3,2-d][1,3] dioxol-5-yl)-2-oxo-5′,6′,7′,7a-tetra-hydro-1′H, 2H-spiro-[acenaphthyl-ene-1,5′-pyrrolo-[1,2-c][1,3]thia-zole] -6′-carboxyl-ate

Abstract

In the title compound, C34H35NO7S, the acenaphthyl-ene unit is essentially planar (r.m.s. deviation = 0.0335 Å). The pyrrolo-thia-zole ring system is folded about the bridging N-C bond; the thia-zolidine and pyrrolidine rings adopt S-and C-envelope conformations, respectively, with a butterfly angle between the mean planes of 51.38 (10)°. The dioxolane and tetra-hydro-furan rings adopt O-and a C-envelope conformations, respectively, with a butterfly angle between the mean planes of 57.12 (10)°. Two C atoms are each disordered over two positions with site-occupancy factors of 0.450 (7) and 0.550 (7). The crystal packing is stabilized by C-H⋯O inter-actions, generating an R 2 2(14) graph-set ring motif.