In order to better understand the chlorine and bromine stable isotope fractionation that occurs when chloride and bromide salts precipitate from their saturated solutions, we determined experimentally the equilibrium fractionation factors between precipitating pure salt minerals and their coexis...
This work describes the first known the use of electrokinetic treatments and ionic salt washes to remediate concrete contaminated with 137Cs. A series of experiments were performed on concrete samples, contaminated with K+ and 137Cs, using a bespoke migration cell and an applied electric field (...
Mechanical-phase mixtures of a phosphomolybdic cesium salt containing V and Te as counter-cations and α-La2Mo2O9 (LM) or β-La2Mo1.9V0.1O8.95 (LMV) have been studied as catalysts for the partial oxidation of isobutane into methacrylic acid (MAA) and methacrolein (MA). The catalysts with 50 wt.%...
Publisher SummaryAll pyrazolones are named according to the International Union of Pure and Applied Chemistry (IUPAC) recommendations as pyrazol-3-ones and not as pyrazol-5-ones. The IUPAC nomenclature numbers the ring clockwise, whereas most organic chemists are used to an anti-clockwise number...
Chiral, biphenyl-bridged metallocene complexes of general type biph(3,4-R2C5H2)2MCl2 (biph = 1,1′-biphenyldiyl) were synthesized and characterized. For the dimethyl-substituted titanocenes and zirconocenes (R = CH3; M = Ti, Zr), preparations with increased overall yields and an optical resoluti...
Because sodium cholate proved to be a more reliable activator than sodium taurocholate for human serum lipase assay, a series of α-naphthyl alkanoates (of 8-, 9-, 10-, and 14-carbon acids), β-naphthyl alkanoates (of 8–16-carbon acids) and β-naphthyl alkenoates (of 2-nonenoic and 2-decenoic a...
Complexes of α-naphthyl red with the chlorides of cobalt(II), nickel(II) and copper(II) have been prepared. The stereochemistry for each of the complexes has been obtained from spectral and magnetic data. The initial decompositions of the metal complexes have been studied by thermogravimetry. T...
Kupffer cells are involved in phagocytosis and known to release biologically active mediators during early events of liver injury. Such functional properties of Kupffer cells can be modulated by methyl palmitate (MP). Therefore, efficacy of MP to modulate Kupffer cell function was evaluated in c...
Methyl palmitate (MP) has been shown earlier to inhibit Kupffer cells and rat peritoneal macrophages. To evaluate the potential of MP to inhibit the activation of other macrophages, RAW cells (macrophages of alveolar origin) were treated with varying concentrations of MP (0.25, 0.5, 1 mM). Asses...
A library of fifty-seven 2,4-disubstituted quinazoline derivatives were designed, synthesized and evaluated as a novel class of multi-targeting agents to treat Alzheimer's disease (AD). The biological assay results demonstrate the ability of several quinazoline derivatives to inhibit both a...
Carbamates are widely used in the chemical industry so understanding their toxicity is important to safety assessment. Carbamates have been associated with certain toxicities resulting in publication of structural alerts, including alerts for mutagenicity. Structural alerts for bacterial mutagen...
New poly(vinyl carbamates) and poly(vinyl thiocarbonates) have been prepared either by free radical polymerization of monomers or by chemical modification of poly(vinyl chloroformate) with appropriate amines and thiols using phase transfer catalysis. The structure of these polymers has been exam...
Vinyl carbamate (VC) is derived from ethyl carbamate (EC), a chemical found in alcoholic beverages and fermented foods. The objectives of this study were to characterize the formation of lung tumors induced by VC in F1 (Big Blue® x A/J) mice, and to identify the mutations formed in the Kras2 gen...
Chlorophyllin (CHL), a water-soluble sodium and copper derivative of chlorophyll, has been shown to be a strong antimutagen in several test systems, but its mechanism of antimutagenic action is largely unknown. In the present study, we have found the protective properties of CHL against vinyl ca...
Vinyl carbamate reacted with dimethyldioxirane in dry acetone to give a high yield of pure crystalline vinyl carbamate epoxide. This epoxide was characterized by its NMR and MS spectra and elementary analysis. It is unstable at room temperature and has a half-life in water solution of approximat...
Treatment of urea or carbamate derived benzomorpholines with lithium diisopropylamide generates N-vinyl ureas or N-vinyl carbamates by elimination of a phenoxide anion, cleaving the benzomorpholine ring. Simultaneous formation of a carbanion α to a stabilising aryl or nitrile group allows migra...
Ruthenium tris(2,2,6,6-tetramethyl-3,5-heptanedionate): a structurally well defined O-containing transition metal complex is reported as an efficient catalyst for regioselective synthesis of vinyl carbamates using carbon dioxide, secondary amines and alkynes. The effects of different reaction pa...
Ynamides are versatile 3-atoms building blocks for organic synthesis as they participate in a variety of ionic, radical and pericyclic processes. Converting ynamides into 5-atom building blocks, such as the yet unreported N-vinyl ynamides, would open new avenues in this fascinating chemistry. We...
We report here the synthesis and a combined experimental and theoretical study on molecular structure of 2-thioxo- 3N-(2-methoxyphenyl) −5 [4′-methyl -3′N -(2′-methoxyphenyl) thiazol-2′(3′H)-ylidene] thiazolidin-4-one. The crystal structure has been determined by X-ray diffraction. Crystall...
2-Amino-5-(3-fluoro-4-methoxyphenyl)thiophene-3-carbonitrile have been synthesized from 1-(3-fluoro-4-methoxyphenyl)ethanone, malononitrile, a mild base and sulfur powder using Gewald synthesis technique and the intermediate was treated with 1,3-disubstituted pyrazole-4-carboxaldehyde to obtain ...
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