tert-Butyl 4-(3,4-dichloro­anilino)piperidine-1-carboxyl­ate

In the title compound, C₁₆H₂₂Cl₂N₂O₂, the substituted piperidine ring adopts a chair conformation with both substituents in equatorial positions. In the crystal, N—H...O and C—H...O hydrogen bonds connect mol­ecules into ribbons along the a-axis direction.

3-(4-Bromo­phen­yl)-1-butyl-5-[1-(2-chloro-6-methyl­phen­yl)-1H-tetra­zol-5-yl]imidazolidine-2,4-dione

In the title mol­ecule, C₂₁H₂₀BrClN₆O₂, the chloro-substituted benzene ring forms a dihedral angle of 77.84 (7)° with the tetra­zole ring and the bromo-substituted ring forms a dihedral angle of 43.95 (6)° with the imidazole ring. The dihedral angle between the tetra­zole and imidazole rings is 67.42 (8)°. The terminal methyl group of the butyl substituent is disordered over two sets of sites, with refined occupancies 0.67 (3) and 0.33 (3). In the crystal, there is a short Br...N contact of 3.183 (2) Å.