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Open Access Article
1 - Application of Water for Synthesis of Cyclopentadienes via Multi-component Reactions of N-methyl imidazole
Alireza Ahmadi Agh Mashhadi Zinatossadat HossainiA water-accelerated multi-component synthesis of organic target molecules was used as a key method for the preparation of cyclopentadiene derivatives. The three-component condensation reactions of primary amines with alkyl propiolates in the presence of N-methylimidazol MoreA water-accelerated multi-component synthesis of organic target molecules was used as a key method for the preparation of cyclopentadiene derivatives. The three-component condensation reactions of primary amines with alkyl propiolates in the presence of N-methylimidazole in water at room temperature were developed as efficient and clean green synthetic procedures for the high-yielding preparation of 4-oxo-2,5-cyclopentadiene-1,2-dicarboxylate derivatives. Manuscript profile -
Open Access Article
2 - Synthesis, Spectral, Biological and Theoretical Investigation of Some New Sn (IV) Complexes with Schiff Base Ligands Containing NNOS Coordination Sphere
Sheida EsmaielzadehNew tin (IV) complexes of empirical formula, [Cl2 Me2 Sn(H2 L)1-3], where ((H2 L)1-3: Methyl-2- {[1-methyl-2-(2-hydroxy-3-methoxyphenyl)methylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate [H2cd3OMesalMeen], Methyl-2-{[1-methyl-2-(2-hydroxy-4-methoxyphenyl)met MoreNew tin (IV) complexes of empirical formula, [Cl2 Me2 Sn(H2 L)1-3], where ((H2 L)1-3: Methyl-2- {[1-methyl-2-(2-hydroxy-3-methoxyphenyl)methylidynenitrilo]ethyl}amino-1-cyclopentenedithiocarboxylate [H2cd3OMesalMeen], Methyl-2-{[1-methyl-2-(2-hydroxy-4-methoxyphenyl)methylidynenitrilo]ethyl}amino-1-cyclopentenedithiocar-boxylate, [H2 cd4OMesalMeen], Methyl-2-{[1-methyl-2-(2-hydroxy-5-methoxyphenyl)-methylidynenitrilo]ethyl}amino-1- cyclopentenedithiocarboxylate, H2 cd5OMesalMeen]) have been prepared and fully characterized by a variety of physico-chemical techniques. Spectroscopic data suggest that in three complexes the Schiff base ligand is coordinated through oxygen. The Schiff base ligands and their Sn (IV) complexes were tested against two pathogenic bacteria (Staphylococcus aureus as Gram-positive bacteria and Escherichia coli as Gram-negative bacteria). All the complexes exhibit higher antibacterial activity than the free ligands. Computation analyses at the level of DFT with Becke’s three parameter hybrid methods were performed to study the geometrics, electronic structures; HOMO- LUMO energy gap, dipole moment and its calculated vibrational frequencies were investigated. An excellent agreement between the experimental and calculated results obtained from the two spectra methods. Manuscript profile -
Open Access Article
3 - Nanocatalyst of ZnO Supported Copper Oxide Catalyzed Chemoselective Synthesis of 1,1-diacetates
Jalal Albadi Azam MansournezhadIn this research, a metal oxide nanocatalyst of ZnO supported copper oxide is reported as a highly efficient recyclable catalyst for the chemoselective synthesis of 1,1-diacetates. The catalyst was synthesized by co-precipitation method and characterized by XRD, BET spe MoreIn this research, a metal oxide nanocatalyst of ZnO supported copper oxide is reported as a highly efficient recyclable catalyst for the chemoselective synthesis of 1,1-diacetates. The catalyst was synthesized by co-precipitation method and characterized by XRD, BET specific surface area, ESEM, EDS and TEM analysis. A wide range of aldehydes, including aromatic and aliphatic aldehydes were converted into the corresponding 1,1-diacetates. The experimental procedure with CuO-ZnO nanocatalyst is quite straightforward. The catalyst can be recovered by simple filtration and recycled up to 6 consecutive runs without any losing of its efficiency Manuscript profile -
Open Access Article
4 - Removal of Alizarin Red Dye Using Calcium Hydroxide as a Low-cost Adsorbent
Thimmasandra Narayan Ramesh Ashwathaiah Ashwini Devarahosahally Veeranna KiranaCalcium ions have very strong affinity and binds effectively to alizarin red dye during staining of biomaterials. This promotes us to choose calcium hydroxide as a low cost adsorbent for the removal of alizarin red dye. Various parameters such as pH, concentration, dose MoreCalcium ions have very strong affinity and binds effectively to alizarin red dye during staining of biomaterials. This promotes us to choose calcium hydroxide as a low cost adsorbent for the removal of alizarin red dye. Various parameters such as pH, concentration, dose of adsorbent, time, and temperature have been investigated. In addition, enthalpy, entropy, free energy and activation energy have been estimated. Different types of isotherms have been evaluated to understand the nature adsorption and its kinetics. It has been found that the adsorption equilibrium can be obtained after 120 minutes. The adsorption of alizarin red dye on calcium hydroxide is endothermic in nature and occurs spontaneously. It has been found that the adsorption is effective at pH = 12 (60 o C) and the kinetic parameters indicate that the adsorption phenomena is of monolayer type and fits well for the pseudo-second order rate equation. Manuscript profile -
Open Access Article
5 - A One-Pot Synthesis of Highly Functionalized Ketenimines by a Three-component 2-Thioxothiazolidin-4-one, Alkyl Isocyanides and Dialkyl Acetylenedicarboxylates
Khadijeh YadollahzadehThe 1:1 reactive intermediates produced in the reaction between alkyl isocyanides and dialkyl acetylenedicarboxylates were trapped with 2-thioxothiazolidin-4-one to generate to highly functionalized ketenimines. A series of new 2-thioxothiazolidin-4-one derivatives were MoreThe 1:1 reactive intermediates produced in the reaction between alkyl isocyanides and dialkyl acetylenedicarboxylates were trapped with 2-thioxothiazolidin-4-one to generate to highly functionalized ketenimines. A series of new 2-thioxothiazolidin-4-one derivatives were synthesized in moderate yields. The advantages of the present method include good functional group tolerance and simple experimental procedure and purification Manuscript profile -
Open Access Article
6 - Decolorization of Cationic and Anionic Textile Blue Dyes from Aqueous Solution with Advanced Oxidation Process Using H2O2 and Various Catalysts
Fatemeh Jahedi Hamid Modarress Elham KeshmirizadehIn this study, we used advanced oxidation process (AOP)for the removal of a cationic and anionic blue dyes, namely Basic Blue 3 (BB3) and Acid blue 62(AB62), from aqueous solutions. Fenton reactions are mixture of H2 O2 and Fe2+. However this paper investigates the appl MoreIn this study, we used advanced oxidation process (AOP)for the removal of a cationic and anionic blue dyes, namely Basic Blue 3 (BB3) and Acid blue 62(AB62), from aqueous solutions. Fenton reactions are mixture of H2 O2 and Fe2+. However this paper investigates the application of twelve different catalysts such as: FeCl2 , FeSO4, (NH4 )Fe(SO4 )2 , FeCl3 , Nano iron (Fe0 ), Fe(NO3 )3 , K2FeO4 , Nano Silver (Ag̊ ), Nano ZnO, Zn(NO3 )2 , Nano Al2O3 andAl2 (SO4 )3 , with the H2 O2 . The formed hydroxyl radicals led to the oxidative degradation of BB3& AB62. The results show that the optimum amounts of reagent was 5.6 mg/L as a metal catalyst and 30mM of H2O2 for an initial dye concentration at 50 mg/L. The percentremoval of dye were found to be strongly influenced by the increasing of the oxidant and metal catalyst up to a certain value. It was found that the maximum removal of dye (up to 99.9%.) was enhanced using pH = 3.The best catalyst for the decomposition of AB62 dye was FeCl2 and for BB3 dye wasNH4Fe(SO4 )2 .The correlation coefficient (R2 ) obtained from first order reaction model were found to be higher than 0.98 for both investigated dyes. Comparing the results shows that the removal of AB62 is more feasible compare with BB3. Manuscript profile -
Open Access Article
7 - Application of Magnetic-modified Fe3O Nanoparticles for Removal of Crystal Violet from Aqueous Solution: Kinetic, Equilibrium and Thermodynamic Studies
Shiva Dehghan AbkenarThe prepared magnetic-modified Fe3 O4 nanoparticles (Fe3 O4 -TAN) were used as adsorbent for removal of crystal violet (CV) from water solution. The effects of pH, contact time, dye concentration and temperature on adsorption were determined. The experimental data were MoreThe prepared magnetic-modified Fe3 O4 nanoparticles (Fe3 O4 -TAN) were used as adsorbent for removal of crystal violet (CV) from water solution. The effects of pH, contact time, dye concentration and temperature on adsorption were determined. The experimental data were analyzed using the Langmuir adsorption model. The data fitted well to the model with maximum adsorption capacities 84.0 mg/gunder pH=11.0. Also the adsorption kinetics and thermodynamic parameters were studied and evaluated. Adsorption of the CV to nanoparticles reached equilibrium after 15 min. In addition, the external magnetic field could easily separate nanoparticles from water with high separation efficiency. Manuscript profile -
Open Access Article
8 - An Expeditious One-pot Synthesis of Imidazo[1,2-a]pyridines using ZnCl2.SiO2 as a Recyclable Heterogeneous Catalyst under Solvent-free Condition
Haleh Sanaeishoar Mina Bashirpour Fouad MohaveSynthesis of imidazo[1,2-a]pyridines over several solid supported catalysts has been investigated. Among these catalysts, ZnCl2 .SiO2 (silzic) showed excellent yields and short reaction times. The silzic catalyst could be recovered and reused in five reaction cycles. Th MoreSynthesis of imidazo[1,2-a]pyridines over several solid supported catalysts has been investigated. Among these catalysts, ZnCl2 .SiO2 (silzic) showed excellent yields and short reaction times. The silzic catalyst could be recovered and reused in five reaction cycles. The present procedure offers several advantages such as short reaction time, simplicity of the reaction procedure, the elimination of solvents, simple workup, recovery and reusability of the catalyst. Manuscript profile -
Open Access Article
9 - A Theoretical Study on Applying Conformational Analysis of 2-Halo-2-Oxo-1,3,2-Dioxaphosphorinanes
Fatemeh Azarakhshi Nazanin Farhadyar Mehrnoosh KhaleghianThe quantum-chemical calculations on the conformational properties of 2-flouro-2-oxo- 1,3,2-dioxaphosphorinane (1), 2-choloro-2-oxo-1,3,2-dioxaphosphorinane (2) and 2-bromo- 2-oxo-1,3,2-dioxaphosphorinane (3) have been investigated by means of ab initio molecular orbita MoreThe quantum-chemical calculations on the conformational properties of 2-flouro-2-oxo- 1,3,2-dioxaphosphorinane (1), 2-choloro-2-oxo-1,3,2-dioxaphosphorinane (2) and 2-bromo- 2-oxo-1,3,2-dioxaphosphorinane (3) have been investigated by means of ab initio molecular orbital (HF/6-311+G**) and hybrid density functional theory (B3LYP/6-311+G**) based methods and Natural Bond Orbital (NBO) interpretation in solid state was performed. Geometrical analysis supports clearly the participation of hyperconjugative endo-anomeric (LPO→σ*P-X) effect in the stabilization of axial series of compounds and the participation of exo-anomeric (LPX→σ*P-O) effect in the stabilization of the equatorial phosphinanes in chair conformations. The stereoelectronic effects associated with bonding-anticoding delocalization electron are more significant for the explanation of the conformational behavior of compounds 1-3 than the dipole-dipole interaction effects. Manuscript profile -
Open Access Article
10 - An Efficient Protocol for Synthesis of 2-amino-3cyanopyridine Derivatives using Nano-modified SBA-15
Behrooz Mirza Neda NasseriCondensation reaction of chalcones with malononitrile and ammonium acetate in the presence of the green nano-modified SBA-15 affords the corresponding 2-amino-3-cyanopyridine derivatives in excellent yield. This approaches claimed to be an environment friendly protocol MoreCondensation reaction of chalcones with malononitrile and ammonium acetate in the presence of the green nano-modified SBA-15 affords the corresponding 2-amino-3-cyanopyridine derivatives in excellent yield. This approaches claimed to be an environment friendly protocol as it afforded some advantages such as excellent yields and cleaner reaction. Manuscript profile -
Open Access Article
11 - Green bio-synthesis of Silver Nanoparticles Using Ziziphora tenuior L Water Extract
Sajjad Sedaghat Parvin AfsharDifferent biological methods are gaining recognition for the production of silver nanoparticles (Ag-NPs) due to their multiple applications. The use of plants in the synthesis of nanoparticles emerges as a cost effective and eco-friendly approach. In the present study, MoreDifferent biological methods are gaining recognition for the production of silver nanoparticles (Ag-NPs) due to their multiple applications. The use of plants in the synthesis of nanoparticles emerges as a cost effective and eco-friendly approach. In the present study, the synthesis of silver nanoparticles by using Ziziphora tenuior L of water extraction was carried out. For this purpose the water extract of Ziziphora tenuior L is used as the reducing agent. By addition of silver nitrate to this extract at room temperature, the color of the extract changed from pale yellow to dark brown, which showed the formation of silver nanoparticles. The characteristics of the obtained silver nanoparticles were studied using different methods, which including; ultraviolet-visible spectroscopy (UV-Vis), powder X-ray diffraction (XRD), scanning electron microscopy (SEM). Ziziphora tenuior L was found to display strong potential for the synthesis of silver nanoparticles by rapid reduction of silver ions (Ag+ to Ag°). Manuscript profile -
Open Access Article
12 - Application of Triphenylphosphine for Facile Synthesis of Several Alkyl Acrylates from Heterocyclic Phenols
Bita Mohtat Hoorieh Djahaniani7-Hydroxycoumarine undergoes a smooth reaction with alkyl propiolates in the presence of triphenylphosphine (15 mol%) to produce the corresponding alkyl (E)-3-((2-oxo-2H-chromen- 7-yl)oxy)acrylate in good yields. When the reaction was performed by 3-hydroxyquinoline sim More7-Hydroxycoumarine undergoes a smooth reaction with alkyl propiolates in the presence of triphenylphosphine (15 mol%) to produce the corresponding alkyl (E)-3-((2-oxo-2H-chromen- 7-yl)oxy)acrylate in good yields. When the reaction was performed by 3-hydroxyquinoline similar alkyl acrylates were obtained. Manuscript profile
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