An easy method was developed for the efficient preparation of diversely new 5,5-disubstituted N(3),N'(3)-linkaged bis-hydantoins. At first, using the same methods, some ketones and terephthalaldehyde were converted to several hydantoins and a new bis-hydantoin , respectively. Then 1,6-dibromohexane, as a mild reagent, was employed for the alkylation and incorporation of synthesized substrates t...

In recent years, microwave irradiation using commercial domestic ovens for the optimization and acceleration of organic reactions has rapidly increased1−2.It has been reported that a variety of reactions such as Dielsalder , ene, Claisen reactions , Fischer cyclization, synthesis of heterocycles , hydrolysis of esters , hydrogenation, deprotection of benzyl ester, deacetylation of diacetates, o...

THE TITLE COMPOUND [SYSTEMATIC NAME: bis(2,5-dioxo-4,4-diphenylimidazolidin-1-ido-κN(1))bis(ethylenediamine-κ(2)N,N')cobalt(II)], [Co(C(15)H(11)N(2)O(2))(2)(C(2)H(8)N(2))(2)], has site symmetry . The Co(II) cation is located on an inversion center and coordinated by two phenytoin anions and two ethyl-enediamine ligands in a distorted octa-hedral geometry. In the phenytoin anion, the two phenyl ...

Abstract This study aims to find out the way of synthesis, formulas, electronic spectra, magnetic properties, and infrared spectra formed from copper(II) with hydantoin. Copper(II)-hydantoin complex has been synthesized a mole ratio 1:2 metal ligand in methanol. The empirical formula estimated analysis copper content was Cu(hydantoin) 3 SO 4 (H 2 O) n (n = 3, or 5). Electrical conductivity show...

A set of 30 substituted 5,5'-diphenyl-2-thioxoimidazolidin-4-one (thiohydantoins) derivatives was synthesized, and their affinity for the human CB(1) cannabinoid receptor has been evaluated. These compounds are derived from the previously described cannabinoid ligands 5,5'-diphenylimidazolidine-2,4-dione (hydantoins). The replacement of the oxygen by a sulfur leads to an increase of the affinit...

BACKGROUND The general purpose of this study was to deduce the geometry of the bioactive face (pharmacophore) for the hydantoin class of anticonvulsants. METHODS Six hydantoin analogs, selected as probes of hydantoin structure, were synthesized. Nuclear magnetic resonance spectroscopy and molecular modelling calculations were used to determine the geometric relationship between the aromatic g...

Synthesis of (4',5'-diaza-9'-fluorene)-spiro-5-hydantoin: The paper presents a method for synthesis of (4',5'-diaza-9'-fluorene)-spiro-5-hydantoin. The newly obtained compound was synthesized by a treatment of 4,5-diazafluoren-9-one with sodium cyanide, ammonium carbonate, ethanol and ammonium hydroxide at high pressure and high temperature. The structure of (4',5'-diaza-9'-fluorene)-spiro-5-hy...

A DNA fragment from Microbacterium liquefaciens AJ 3912, containing the genes responsible for the conversion of 5-substituted-hydantoins to alpha-amino acids, was cloned in Escherichia coli and sequenced. Seven open reading frames (hyuP, hyuA, hyuH, hyuC, ORF1, ORF2, and ORF3) were identified on the 7.5 kb fragment. The deduced amino acid sequence encoded by the hyuA gene included the N-termina...

3,5-Disubstituted hydantoin (1,3-imidazolidinedione) derivatives 5a-h were prepared by base induced cyclization of the corresponding N-(1-benzotriazolecarbonyl)-L- and D-amino acid amides 4a-h. Compounds 5a-h were evaluated for their cytostatic and antiviral activities. Among all the compounds evaluated, 3-benzhydryl-5-isopropyl hydantoin (5a) showed a weak but selective inhibitory effect again...