Mild heating of diazo compounds in DMSO furnishes ketone products in moderate to excellent yields. The reaction is particularly effective on electron-rich substrates and exhibits high chemoselectivity, allowing for the use of diazo compounds containing additional oxidation-prone functional group...
A microwave-assisted three-component one-pot cyclocondensation method was applied for the synthesis of novel N-(1-thia-4-azaspiro[4.5]decan-4-yl)carboxamide compounds carrying an adamantyl moiety. The structures of the compounds were confirmed by spectral and elemental analysis. All compounds we...
β-Hydroxy difluoromethyl ketones represent the newest class of agonists of the GABA-B receptor, and they are structurally distinct from all other known agonists at this receptor because they do not display the carboxylic acid or amino group of γ-aminobutyric acid (GABA). In this report, the de...
We provide a new transfer hydrogenation of structurally diverse aldehydes and ketones in water using formic acid as hydride donor. The iridium complex of 4,4′,5,5′-tetrahydro-1H,1′H-2,2′-biimidazole, is used as the efficient catalyst. The S/C ratios in aldehyde and ketone reductions are as l...
The complexes [Ir(COD)(PR3)2]PF6 (R = PPh3 (1); R = PBn3 = tribenzylphosphine (2)), [Ir(COD)(PBn3)(PAn3)]PF6 (3) (PAn3 = Tri-orthoanisyl-phosphine) and cis-(P,P)-[IrH(COD)(PBn3){η2-P,C-(C6H4CH2)PBn2}]PF6 (4) are active in the transfer hydrogenation of ketones. However, complex (3) gives the bes...
The energies of combustion of 1-adamantyl methyl ketone, and 1,1'-diadamantyl ketone have been determined using a static bomb calorimeter. The vapour pressures have been measured over a temperature range of about 17K by the Knudsen-effusion technique. From the experimental results the follo...
Twelve boronic esters (1a-1l) synthesized from 4-halo- substituted arylboronic acids (halo = F, Cl, Br, I and CF3) with 2-amino-2- alkyl (H, Me) -1,3-propanediol in presence of (3- or 4)-pyridine carboxaldehyde are described. A solvent mixture toluene/methanol 1:4 ratio was used. All compounds i...
The adsorption of DPKSH onto Amberlite XAD-2 (styrene resin) and XAD-7 (acrylic ester resin) has been investigated, at (25±1)°C and pH 4.7. The experimental equilibrium data were fitted to the Langmuir, Freundlich, and Dubinin–Radushkevich (D-R) models. These three models provide a very good ...
Self-assembled monolayer (SAM) films of phosphonates have been successfully formed via reaction of 11-hydroxyundecylphosphonic acid or 4,4′-di(methylenephosphonic acid)-2,2′-bipyridine with the oxide layer of copper via the Tethering by Aggregation and Growth (TBAG) deposition method. The hydr...
Biodiesel obtained from vegetable oils is considered a renewable fuel and because of its environmental advantages and low cost it is in sight of many investigations all around the world. This work discusses the application of a new metal-organic framework (MOF) on the ultrasonic-assisted transes...
Monodisperse TiO2 nanoparticles are obtained through hydrolysis of titanium butoxide in the presence of di(2-pyridyl)ketone (DPK) and para-toluenesulfonic acid. The DPK ligand stabilized the surface of the TiO2 nanoparticle through complexation with TiO2. DPK stabilized TiO2 (TNP-DPK) can be dis...
The synthesis and crystal structure elucidation of two novel polymeric copper(II) complexes has led us to propose a mechanism for the formation of 2-picolinic acid (pic) from di-2-pyridyl ketone (dpk) and benzoic acid from acetophenone. During studies into the interaction of copper ions with the...
Nanometer sized Ag–TiO2 nanoparticles were prepared (by photoreduction of Ag+ ions) in order to assess its photocatalytic degradation ability of target pollutant (textile dye; Acid red 88) upon visible light irradiation. Furthermore, oxidative reagents such as peroxomonosulfate (PMS), peroxodis...
Metal loaded semiconductors in general possess greater photocatalytic activity than pure semiconductors. Hence, with an attempt to achieve higher photocatalytic activity, Au–TiO2 photocatalysts were prepared by deposition–precipitation method and used for the photocatalytic degradation of an a...
A magnetic ZnFe2O4 (MNZnFe) was synthesized by microwave assisted hydrothermal method and was used as an adsorbent for the removal of acid dye Acid Red 88 (AR88) from aqueous solution. The effects of various parameters such as initial AR88 concentration (10–56 mg L−1), pH solution (3.2–10.7), ...
Acid red 88 (AR88) is a mono-azo textile dye and a widely used colorant in the textile and food industries. The sonolytic, photocatalytic and sonophotocatalytic degradation of AR88 in the presence of homogeneous (Fe3+) and heterogeneous (TiO2) photocatalysts were studied. The effects of initial ...
In this study, electro-Fenton method was applied to acid red 88 (AR88) containing aqueous solutions for the removal of it from water. The mineralization of AR88 has been achieved by oxidation with hydroxyl radicals. These radicals were produced simultaneously by the electro-Fenton method using a...
A novel, simple, less time-consuming and cost-effective wet chemical technique was used to synthesis TiO2 nanoparticles and TiO2–SiO2 nanocomposites using Titanium tetra isopropoxide (TTIP) as a precursor relatively at low temperature in acidic pH. Titania sol was prepared by hydrolysis of TTIP...
Visible light-assisted photo-Fenton-like oxidation of a mono-azo textile dye, acid red 88 (AR88), has been carried out in the presence of Co2+ as the catalyst and peroxomonosulphate (PMS) as the oxidant. Decolorization of AR88 in the Co2+/PMS system was observed to follow zero-order kinetics wit...
We report an efficient one-step approach to 4-thio and 4-aminopyrrolo[3,4-c]pyridines based on the selective reaction of malonthioamides and malonamidines with methyl acetylpyruvate. Structural proof is given by HMBC and HMQC spectra. A cascade heterocyclization mechanism is proposed for the rea...
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