The three-component reactions of 4-dimethylamino- or 4-methoxypyridine with acetylenedicarboxylates and arylidene cyanoacetates showed very interesting molecular diversity. The polysubstituted 1,8,9,9a-tetrahydro-4H-1,4-ethanoquinolizines, 2H-pyran-2,3-dicarboxylates, and buta-1,3-diene-1,2,4-tr...
A facile, efficient, racemization-free, and environment friendly protocol for the synthesis of peptide hydroxamic acids directly from carboxylic/amino acids by ethyl 2-(tert-butoxycarbonyloxyimino)-2-cyanoacetate in the presence of DIPEA/DMAP at room temperature is described. The compatibility o...
α-Arylated carbonyl derivatives are important structural motifs in many natural products and pharmaceutically active compounds. Although arylation of simple monocarbonyl compounds is a well-established methodology, metal-catalyzed arylation of β-dicarbonyl derivatives is significantly more cha...
A palladium-catalyzed synthesis of aryl nitriles by the cyanation of aryl iodides with tert-butyl isocyanide as cyano source has been developed. This novel and efficient method avoids the use of toxic cyanides. The reaction is easy-to-handle and shows good functional group compatibility.
The reaction of thiodiglycolaldehyde and diglycolaldehyde with tert-butyl cyanoacetate yields derivatives of tetrahydrothiopyran and tetrahydropyran, respectively. Similar reactions of diglycolaldehyde derivatives having a furan nucleus at the α-position yield d-xylo (major) and l-arabino (mino...
Reorientational relaxation times and densities of binary mixtures of 4-cyano-4′-pentylbiphenyl (5CB)–triphenylphosphite (TPP) were measured as functions of composition and temperature. The reorientational relaxation time was determined from the polarized light scattering spectra by the optical...
Polymer dispersed liquid crystal (PDLC) films are heterogeneous composite materials consisting of micron-sized droplets of liquid crystal dispersed in a continuous polymer matrix. They are formed by a phase separation process of the LC component from the polymer. PDLC films can be switched from ...
The ultrathin film of mesogenic molecules 5CB confined between graphene walls has been investigated by molecular dynamics (MD) technique. The dynamical observables of 4-cyano-4-n-pentylbiphenyl (5CB) were calculated for several temperatures: the mean square displacement, translational and angula...
The effect of electric field on the molecular polarizability and HOMO–LUMO gap for 4-cyano-4′-pentylbiphenyl (1) and its nitrogen derivatives 2-cyano-5-(4-pentylphenyl)pyridine (2), 2-(4-cyanophenyl)-5-pentylpyrimidine (3) and 5-cyano-2-(4-pentylphenyl)pyrimidine (4) has been studied using den...
This paper presents a comprehensive investigation regarding the chloride transport and microstructure of plain concrete and fly ash blended concrete under atmospheric chloride environment. Experimental results demonstrate that all the free, bound, and total chlorides show a build-up of ion conce...
This research studies the effect of the widely used coagulant ferric chloride on the activated sludge sedimentability through a vast array of hindered settling tests considering different application modes and a wide range of reagent doses. Direct application of ferric chloride improved the hind...
Heterocyclic compounds particularly five, six and seven membered ring containing heterocycles are the most abundant which constitute a staggeringly diverse and important class of molecules that occur ubiquitously in a variety of synthetic drugs, bioactive natural products, pharmaceuticals and ag...
A field research is carried out at atmospheric marine zones for evaluating the chloride deposition behavior of concrete structures under multiple geographic and environmental factors. Geographic factors of offshore distance, elevation, concrete surface orientation and building barrier, and envir...
In order to provide an efficient way to describe the probabilistic characteristics of chloride diffusion coefficient, a probabilistic prediction model which involves both aleatory and epistemic uncertainties was developed for chloride diffusion coefficient of concrete in terms of material parame...
The chloride profile in carbonated concretes with fly ash were measured after rapid chloride permeability test, so as to investigate the influence of carbonation degree on chloride ions diffusion and distribution. It is found that fly ash improved the carbonation resistance of concrete with low ...
The extraction of palladium(II) from an aqueous hydrochloric solution was carried out using divinylbenzene microcapsules containing tri-n-octylamine as the extractant. The preparation of these microcapsules was affected by the preparation conditions, such as the concentrations of the divinylbenz...
The thermal dissociation of tri-n-octylamine hydrochloride (TOAHCl) in open system was investigated by TGA and DFT methods. The dissociation starts at the temperature of about 120 °C which was predicted with DFT calculations and verified by isothermal TGA. Then a thermodynamic cycle depicting t...
The reactive extraction of levulinic acid using two different extractants [tri-n-butyl phosphate (TBP) and tri-n-octylamine (TOA)] dissolved in 1-octanol was investigated at 298 K. Using the equilibrium data, the distribution coefficient (KD), extraction efficiency (%E) and loading ratios (Z) we...
Concern of the recovery of important constituents found in nature, industrial waste streams and fermentation broth, the present study is aimed to recover gallic acid (HGA) from aqueous solution using tri-n-octylamine (TOA) in a non-toxic diluent, oleyl alcohol (OA). The optimal conditions for ma...
A series of divalent N‑alkylethylenediamine (alkyl‑en) metal(II) (alkyl = hexyl, 2‑ethylhexyl, octyl, dodecyl; metal = Ni, Cu, and Zn) complexes was prepared and their phase behavior was studied using differential scanning calorimetry. This kind of metal complexes is very useful for systematical...
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