Methyl 4-phenyl-1,2,3,3a,4,4a,5,12c-octa-hydronaphtho[1',2':3,2]furo[5,4-b]pyrrolizine-4a-carboxyl-ate

Crystal structure of 2'-[(2',4'-di-fluoro-biphenyl-4-yl)carbon-yl]-1'-phenyl-1',2',5',6',7',7a'-hexa-hydro-spiro-[indole-3,3'-pyrrolizin]-2(1H)-one

In the title pyrrolizidine derivative, C33H26F2N2O2, both pyrrolidine rings of the pyrrolizidine moiety adopt an envelope conformation. The di-fluoro-phenyl group is oriented at an angle of 54.3 (1)° with respect to the oxindole moiety. The crystal packing features an N-H⋯O hydrogen bond, which forms an R 2 (2)(8) motif, and a C-H⋯O inter-action, which generates a C(8) chain along [010]. In addition, this chain structure is stabilized by C-H⋯π inter-actions. In one of the pyrrolidine rings, the methyl-ene group forming the flap of an envelope and the H atoms of the adjacent methyl-ene groups are disordered over two sets of sites, with site-occupancy factors of 0.571 (4) and 0.429 (4).

Methyl 4-(4-chlorophenyl)-3,3a,4,4a,5,12c-hexahydro-2-thianaphtho[1′,2′:3,2]furo[5,4-b]pyrrolizine-4a-carboxylate

In the title compound, C₂₅H₂₂ClNO₃S, both the pyrrolidinyl and thia­zolyl rings adopt envelope conformations whereas the dihydro­pyran ring adopts a half-chair conformation. The chloro­phenyl and naphthalenyl ring systems are oriented at a dihedral angle of 59.7 (1)°. The crystal packing is stabilized by an intra­molecular C—H⋯N hydrogen bond and weak inter­molecular C—H⋯π inter­actions.