The lipase-catalyzed resolution of (R,S)-pyrazolides containing a 2-aryl substituent to the α-chiral center has been successfully extended to (R,S)-N-2-methylalkanoyl-3-(2-pyridyl)pyrazoles (1–4) containing different alkanoyl-chain lengths. The best reaction condition for CALB-catalyzed hydrol...

The hydrothermal reaction of the uranyl cation, copper(II), and trans-3,3(pyridyal)acrylic acid (T33PA) has yielded two new bimetallic uranyl containing coordination polymers, (UO2)2(C8H6O2N)6Cu (1) and [(UO2)2(O)(H2O)(C8H6O2N)3CuCl]·H2O (2). Herein we discuss the synthesis, structure, and lumi...

Regio- and stereoselective 1,3-dipolar cycloadditions of C-(3-indolyl)-N-phenylnitrone (10) were carried out with different mono-substituted, disubstituted and cyclic dipolarophiles under mono-mode microwave irradiation to obtain substituted 3-(indol-3′-yl)-N-phenyl-isoxazolidines (16–22). Rea...

A new kind of eco-friendly superabsorbent polymer was successfully synthesized using (2-pyridyl) acetyl chitosan chloride (PACS), acrylic acid (AA) and acrylamide (AM) in aqueous solution by a free radical polymerization. The effect of different reaction conditions, such as the initiator content...

The preparation and some properties of the complexes of 3-(3-pyridyl)acrylic acid with cobalt and nickel are described. Spectral, magnetic and solubility studies show that the complexes, which are hydrated, have polymeric octahedral structures. The thermal behaviour of these compounds has been s...

The preparation and some properties of the chloro complexes of 3-(3-pyridyl)acrylic acid with cobalt, nickel, copper and zinc are described. Magnetic measurements, electronic and infrared spectra indicate that the compounds have octahedral structures with the 3-(3-pyridyl)acrylic acid bonded to ...

In this work, we present an electrochemical DNA sensor based on silver nanoparticles/poly(trans-3-(3-pyridyl) acrylic acid) (PPAA)/multiwalled carbon nanotubes with carboxyl groups (MWCNTs–COOH) modified glassy carbon electrode (GCE). The polymer film was electropolymerized onto MWCNTs–COOH mo...

Photo-active trans-3-(4-pyridyl)acrylic acid (PYA) modified chitosan (CSPA) was synthesized with different functionalization degrees and extensively examined using Fourier transform infrared spectra (FTIR), 1H and 13C nuclear magnetic resonance (NMR) in order to elucidate the chemical structure ...

The reaction of 3-nitro-2-trifluoro(trichloro)methyl- and 3-nitro-2-phenyl-2H-chromenes with 1-morpholinocyclopentene under the conditions of kinetic or thermodynamic control led to the formation of products due to enamine addition at the C-4 atom of chromene as individual cis,trans- or trans,tr...

α-Azobenzyl hydroperoxides (4) isomerize to N-(4-bromoanilino)-peroxycarboximidic acids (5), which are transformed into benzoic acids (6), by the pyridine-catalyzed reaction.

The synthesis of the derivatives of p-aminotetrafluorobenzoic acid, p-H2NC6F4CO2H (2b), by hydrolysis, acylation or interaction with aldehydes was developed giving H2NC6F4CO2K (2a), C6F5C(O)N(H)C6F4CO2Et (3) and (E)-ArCHNC6F4CO2Et (4–11). The chemical derivatization of tetrafluoroterephthalic a...

Previously, we focused on a series of 2-aminobenzamide-based histone deacetylase (HDAC) inhibitors, compound 9 of which displayed potent HDAC inhibitory activity against HDAC1 and HDAC2, and moderate anti-proliferative activity against several cancer cell lines. In the current study, we have des...

Synthesis of a variety of new 1-(isomeric fluorobenzoyl)-3-(isomeric fluorophenyl)thioureas (1a–t) was accomplished in two steps. The synthetic route involves the reaction of equimolar quantities of isomeric fluorobenzoyl chlorides with potassium thiocyanate in anhydrous acetone to afford the c...

Thermodynamic step-wise stability constants for the interactions of lanthanide(III) ions with phthalanilic, 4-methylphthalanilic, 4-chlorophthalanilic, 4-bromophthalanilic and 4-nitrophthalanilic acids were determined at 22, 30 and 40 ° C by the Bjerrum-Calvin titration technique as adopted by ...

This work aims to study the influence of the amino group in positions 5 and 6 of the benzene ring of indazole. For that purpose, the standard (p∘=0.1MPa) molar enthalpies of formation of 5- and 6-aminoindazole, in the gaseous phase, at T = 298.15 K were determined. These values were calculated ...

The effect of disodium EDTA, as an additive, on the crystallization of struvite and carbonate apatite was studied. The growth of struvite crystals and carbonate apatite occurred in the solution of artificial urine at 37 °C and at the condition emulating real urinary tract infection. The results...

Effect of disodium EDTA (salt of ethylenediamine tetraacetic acid) on the crystallization of struvite and carbonate apatite was studied. To evaluate such an effect we performed an experiment of struvite and carbonate apatite growth from artificial urine. The crystallization process was induced b...

This study aimed to prevent the phenomena of efflorescence formation on the surface of dry fermented sausages due to the complexation of efflorescence forming cations with phosphates. Efflorescence formation is a critical issue constituting a major quality defect, especially of dry fermented sau...

An iodide electrode suitable for measuring the iodide produced in the reaction of iodocompounds with low concentrations of thiols is described. It has been used to determine the number of SH groups in proteins and other thiol compounds.The presence of two reactive thiol groups in creatine phosph...

By use of the neutral alkylating agent iodo [14C1] acetamide instead of ethylene imine or iodoacetate, the resolution of human protamines on gel electrophoresis and ion-exchange chromatography has been improved. Using 20-cm gels, human protamines may be fractionated into seven bands, including t...