Methyl 4′-(4-fluoro­phen­yl)-1′-methyl-3′-nitro­methyl-2-oxospiro­[indoline-3,2′-pyrrolidine]-3′-carboxyl­ate

In the title compound, C₂₁H₂₀FN₃O₅, the the pyrrolidine ring makes dihedral angles of 84.91 (6) and 62.38 (7)° with the oxindole unit and the fluoro­phenyl ring, respectively. The pyrrolidine ring assumes an envelope conformation with the spiro C atom as the flap. The crystal packing features weak N—H...N and C—H...O hydrogen bonds.

2-Chloro-1-(3,3-dimethyl-2,6-di­phenyl­piperidin-1-yl)ethanone

In the title compound, C₂₁H₂₄ClNO, the piperidine ring adopts a chair conformation. The two phenyl rings are inclined to one another by 20.7 (1)°, and are inclined to the mean plane of the four planar atoms of the piperidine ring by 87.64 (10) and 70.8 (1)°. The mol­ecular structure features short intra­molecular C—H...Cl and C—H...O contacts. In the crystal, there are no significant inter­molecular inter­actions present.