1-Heteroaryl-2-aryl-1H-benzimidazole derivatives were synthesized as inhibitors of c-Jun N-terminal kinases, JNK3. Their activities were evaluated through measurement of Kd using SPR, JNK3 kinase assay, and cell-viability of human neuroblastoma cells. Most tested compounds showed high affinity (...

In this study, we developed an electrochemical DNA biosensor based on a poly-3-amino-1,2,4-triazole-5-thiol (P(AT)) film modified glassy carbon electrode (GCE/P(AT)). For the first time, this electrode was used for the determination of a new benzimidazole molecule, 2-(2-phenyl ethyl)-5-methylben...

X-ray diffraction data confirm the formation of a CuL2 complex based on 1-salicylideneimino-3-methylbenzimidazole-2-thione with different coordination modes of ligand binding – N,O,S and N,O.

A complete structural and vibrational analysis of the 4-(2,5-di-2-thienyl-1H-pyrrol-1-yl) benzoic acid (TPBA), was carried out by ab initio calculations, at the density functional theory (DFT) method. Molecular geometry, vibrational wavenumbers and gauge including atomic orbital (GIAO) 13C NMR a...

N-(4′-carboxyphenyl)-2,5-di(2″-thienyl)pyrrole has been efficiently prepared by the Knorr–Paal condensation of 1,4-di(2′-thienyl)butane-1,4-dione with benzocaine(ethyl-4-aminobenzoate), giving N-(ethyl-4′-benzoate)-2,5-di(2″-thienyl)pyrrole, followed by saponification to give the desired a...

A simple synthetic strategy is described for the hitherto unreported 3-arylazo-8H-imidazo[1,2-b]pyrazolo[4,3-d]pyridazines 7 is described based on the reaction of 3-acetyl-4-cyano-1,5-diphenylpyrazole hydrazone 3 with the hydrazonoyl halides 1a–l. The structures of such dyes were confirmed by s...

The electron-electron double-resonance spectra of 1,3,5-triphenylverdazyl and 1,5-diphenyl-3-(4-chlorophenyl)verdazyl radicals were observed in toluene, and the nitrogen hyperfine coupling constants were correctly determined.

3-Aryl-substituted 1,5-diphenylformazans exist as one of the following two isomeric species in the solid state; the yellow isomer having the trans-anti-s-trans configuration with respect to the NN, CN and CN bonds of the formazan skeleton and the red isomer having the trans-syn-s-cis confi...

The macrocyclic crown-formazans 7a-c, 12a-g were prepared by the azo coupling of the appropriate bis-diazonium salts 4a-c with pyruvic acid and arylpyruvic acids 8a-c. The ready accessability of the latters offers an easy access towards 1,5- symmetrically disubstituted-3-arylformazans e.g. 10a-g...

The crystal structure of the stable free radical 3-(9-anthracenyl)-1,5-diphenylverdazyl was determined. There are four independent molecules in the unit cell (space group P̄1). The structure was solved by direct methods. A large number of sets of initial random phases were generated in space gro...

A new isoflavone 7-hydroxy 3′-methoxyisoflavone (1) is isolated from the seeds of Indigofera heterantha. The structure of this new compound was established using spectroscopic techniques such as ID, 2D NMR, and mass spectrometry. Density functional theory calculations are carried out for the fi...

Three glycerol derivatives and a novel 6-butyl-3-hydroxyflavanone derivative were isolated from the heartwood of Bauhinia purpurea L. The latter compound was elucidated as 6-(3″-oxobutyl)taxifolin on the basis of spectral evidence.

The roots of the tropical tree Lonchocarpus oaxacensis afforded the 3-hydroxyflavanones jayacanol and mundulinol, as well as two flavanones, mundulin and minimiflorin. Flavonoids bearing 6,7-(dimethylpyran) and 8-(γγ-dimethyl allyl) substituents are characteristic for species grouped in the Mi...

A general and efficient method for the preparative resolution of α- and β-bromocyclopropylcarboxylic acids has been developed. This protocol involves a sequence of two crystallizations with pseudo-enantiomeric amines, cinchonine, and cinchonidine, which yield both enantiomers of the acid in hi...

A series of 2-cyano-3-(2-fluoro-5-pyridyl)methylaminoacrylates were synthesized as herbicidal inhibitors of photosystem II (PSII) electron transport. 2-Fluoro-5-pyridinemethylamine was prepared from 2-amino-5-methylpyridine, subsequent reaction with 2-cyano-3,3-dimethylthioacrylates or 2-cyano-3...

The paper presents the molecular and XRD structures as well as room temperature IR and Raman studies of 2-hydroxy-3-cyano-4-methylpyridine. The nature and assignment of the vibrational modes have been discussed on the basis of the quantum chemical calculations performed with the use of B3LYP/6-3...

Based on the 6-aminobenzo[c]phenanthridines, a compound class showing noteworthy antitumor activity, an efficient one-step synthesis consisting of a base-catalyzed condensation of 2 equiv of 4-methylpyridine-3-carbonitrile and various aldehydes causing twofold ring closure is described. The obta...

Bis-ligated titanium (IV) metal complexes supported by bidentate unsymmetrical o-hydroxyaryl-substituted N-heterocyclic carbene ligands were synthesized and structurally identified. While the direct addition of the doubly deprotonated bulky imidazolidinium chloride salts [Dipp,4-RNHC-H]Cl (with ...

The single crystal structure, 2-(4-Allyl-5-pyridin-4-yl-4H-[1,2,4]triazol-3-ylsulfanyl)-1-(3-methyl-3-phenyl-cyclobutyl)-ethanone, has been synthesized and characterized by IR, NMR, UV spectra and X-ray diffraction methods. In addition, the optimized structure, the vibrational assignments, the c...

The crystal structure of hexafluoroacetone azine bis(triphenylphosphine)platinum, C42H30F12N2P2Pt, has been determined by single-crystal X-ray diffraction techniques. The compound crystallizes in the monoclinic space group C2/c with a 31.155(3), b 13.091(1), c 21.828(2) Å, β 109.23(1)° and Z =...