In the title compound, C(28)H(23)ClN(2)O(3)S, the central imidazolidine ring adopts a twisted conformation and the S atom has distorted tetra-hedral geometry. The crystal packing is stabilized by C-H⋯O, C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.8302 (10) Å].

The title compound, C(21)H(19)ClN(2)O(5), is a tetra-substituted hydantoin derivative which contains an imidazolidine-2,4-dione core. The dihedral angle between the aromatic rings is 64.53 (14)°. In the crystal, weak inter-molecular C-H⋯O hydrogen bonding is found. An intra-molecular C-H⋯O inter-action also occurs.

In the title mol-ecule, C(15)H(17)N(3)O(2)S(2), the dihedral angle between the naphthalene ring system and the imidazole ring is 89.63 (2)°. The crystal structure is stablized by weak inter-molecuar C-H⋯π and N-H⋯π inter-actions.

The stereochemical divergent synthesis of indolyl-pyrrolidines was accomplished using an imidazoline-aminophenol (IAP)-Ni(OAc)2 complex and a bis(imidazolidine)pyridine (PyBidine)-Cu(OTf)2 complex. The former catalyzed exo'-selective asymmetric [3 + 2] cyclization of iminoesters with indolyl nitroalkenes, and the latter catalyzed the reaction in an endo-selective manner. These catalysts are tol...

In the title compound C21H17N5O4·C2H6OS, the central six-membered ring derived from 1,4-di-hydro-pyridine adopts a distorted boat conformation with a small puckering amplitude of 0.127 (3) Å. The sums of bond angles around the pyridine N atom [358.7 (2)°] and the other imidazolidine N atom [60 (2)°] indicate that these atoms are in sp(2) hybridization, leading to an essentially planar imidazoli...

The title compound, C23H17FN2O3, crystallizes with two independent mol-ecules in the asymmetric unit. The mol-ecules are connected by pairs of N-H⋯O hydrogen bonds and have slightly different conformations, as indicated by the dihedral angles between the central imidazolidine-2,4-dione ring and its three substituents. In one mol-ecule, these are 60.56 (1) and 82.66 (9)° to the phenyl rings and ...

The title compound, C(10)H(7)FO(4), is an inter-mediate in the synthesis of the drug Fidarestat, (2S,4S)-2-aminoformyl-6-fluoro-spiro[chroman-4,4'-imidazolidine]-2',5'-dione. The di-hydro-pyran-one ring adopts an envelope conformation with the asymmetric C atom in the flap position. In the crystal, the mol-ecules are linked into zigzag chains along [100] by O-H⋯O hydrogen bonds and C-H⋯π inter-...

In the title compound, C(28)H(27)ClN(2)O(3)S, the central imidazolidine ring adopts an envelope conformation with the C atom bearing the chloro-phenyl ring at the flap. The geometry around the S atom is distorted tetra-hedral. Three methyl-ene groups of the cyclo-hexene ring are disordered over two sets of sites [site occupancies = 0.562 (10) and 0.438 (10)]. The crystal packing is stabilized b...