In this paper, a novel β-Oxo thioamide surfactant 3-(ethylamino)-N-phenyl-3-thioxopropanamide (EAPhTXPA) was synthesized and first used as flotation collector for galena and sphalerite. The results of micro-flotation tests showed that EAPhTXPA possessed not only stronger collecting ability but ...

Based on the unusual reactivity of trifluoromethyl groups in nitrogen containing heterocycles, we synthesized the appropriate porphyrin mono-, di-, tri- or tetra-carboxylic ester derivatives by treatment of the precursor meso-tetrakis(trifluoromethyl)porphyrin with an excess of sodium- or potass...

A new and efficient method for the synthesis of 2-trifluoromethyl-2-hydroxy-2H-chromenes was developed via intermolecular cyclization of (Z)-trifluoromethyl alkenyl triflates and salicylaldehydes. A series of 2-trifluoromethyl-2-hydroxy-2H-chromenes with aryl or alkyl groups at 3-position have b...

The new multicomponent reaction has been found: the pyridine or triethylamine catalyzed multicomponent transformation of salicylaldehydes, 2-aminoprop-1-ene-1,1,3-tricarbonitrile and 3-trifluoromethyl-2-pyrazolin-5-one results in efficient formation of the earlier unknown substituted 2,4-diamino...

We have found selective conditions for methylation of 3-trifluoromethyl-1H-pyrazol-5-ol that allowed us to obtain mono-Me-substituted N1- and O-isomers as well N1,N2-, N1,O- and N2,O-disubstituted isomers. A tautomeric structure of the parent pyrazole and its Me-substituted derivatives was inves...

The reaction of 3,3-bis(trifluoromethyl)-5-alkoxy-1,2-dithiolanes (RO= OEt or OBu-n) proceeds through thiophilic attack of BuLi leading to the formation of ring-opened product BuSCH(OR)CH2C(CF3)2SLi, which can be converted into the corresponding thiols or sulfides by the reaction with H+ or alky...

Herein we described the design, synthesis and evaluation of a novel series of benzo[d]thiazole derivatives toward an orally active EP1 antagonist. Lead generation studies provided benzo[d]thiazole core from the four designed scaffolds. Optimization of this scaffold in terms of EP1 antagonist pot...

The growth of terbium fumarate heptahydrate single crystals was achieved by single gel diffusion technique using silica gel as a medium of growth. The effect of various growth parameters on the nucleation rate of these crystals was studied. The crystals were characterized by different physico-ch...

Design and synthesis of Lanthanide based metal organic framework is a frontier area of research owing to their structural diversity enabling specific applications. The luminescence properties of rare earths, tuned by the structural features of Ln-MOFs are investigated extensively. Rare earth oxa...

A sensitive and specific luminescence method for the determination of Fexofenadine (FEX), in pharmaceutical formulations is reported. The method is based on the sensitization of terbium (Tb3+) by complex formation with FEX. The luminescence signal for Tb–FEX complex is greatly enhanced by the a...

The crystal structure of Tb(NO3)3·6H2O is determined at 295 K from X-ray diffraction measurements. The compound crystallizes in the triclinic space group P1 (ITC No. 2) with Z=2. Cell parameters are: a=9.095(7), b=11.600(6), c=6.705(4) Å; α=91.14(4), β=110.79(5), γ=70.14(5)°; V=617.9(6) Å3,...

The interaction of tellurium tetrahalides, TeX4 (X = Cl. Br) with 4-(trimethylsilyl)but-3-yn-2-one under dry nitrogen gives novel crystalline 1,1,3-trihalo-2-(trimethylsilyl)telluracyclopent-2-en-4-ones (X = Cl, 1a and X = Br, 2b) as the major products. In a tandem reaction, the trisubstituted v...

Methyl and t-butyl esters of α-bromoacetic acid added oxidatively to elemental tellurium in the presence of sodium iodide to give high yields of crystalline bis(alkoxycarbonylmethyl)tellurium(IV) diiodides, (ROCOCH2)2TeI2. The chloro and bromo analogs were prepared via their reduction into tell...

Elemental tellurium inserts, under mild conditions, between C–I bond of iodoacetamide to afford bis(acetamido)tellurium(IV) diiodide (NH2COCH2)2TeI2, 1. Heating of N-bromomethylphthalimide with activated tellurium powder however, resulted in the formation of bis(phthalimido)methane, 2, instead ...

Physicochemical properties of 1-n-butyl-3-methylimidazolium bromide–copper (II) bromide ionic liquid (BMImBr–CuBr2) were studied with conductometric, densimetric, and viscometric methods. It was shown that the conductivity decreased from 0.386 to 0.275 S cm− 1 with CuBr2 concentration increasi...

The reaction of dithioacetals with 30% hydrogen peroxide in the presence of catalytic amounts of tantalum(V) and iodide ion effectively produced carbonyl compounds in high yields. Dithioacetals also can be deprotected using the niobium(V) catalyzed oxidation of iodide ion by hydrogen peroxide un...

Hexanuclear tantalum bromide cluster units [{Ta6Bri12}La6] (i = inner, a = apical, L = ligand OH or H2O) are embedded into SiO2 nanoparticles by a reverse microemulsion (RM) based method. [{Ta6Bri12}Bra2 (H2O)a4]·nH2O (noted TBH) and tetraethyl orthosilicate (TEOS) are used as the starting clus...

A novel family of ketone functionalized task specific ionic liquids (TSILs) was designed for the selective extraction of tantalum from sulfuric acid medium. We report the synthesis of functionalized hydrophobic ionic liquids based on piperidium, imidazolium or pyridinium cations bearing ketone m...

Dissimilatory metal reducing bacteria (DMRB) widely exist in the subsurface environment and are involved in various contaminant degradation and element geochemical cycling processes. Recent studies suggest that DMRB can biosynthesize metal nanoparticles during metal reduction, but it is unclear ...

Thermal activation of persulfate (PS) has been identified to be effective in the destruction of organic pollutants. The feasibility of carbon tetrachloride (CT) degradation in the thermally activated PS system was evaluated. The experimental results showed that CT could be readily degraded at 50...