Journal of the Iranian Chemical Society

Items from 1 to 20 out of 34 results

article

One-Pot synthesis of dihydropyrimidinones by dodecylphosphonic acid as solid Bronsted Acid Catalyst under Solvent-Free Conditions via Biginelli condensation

S. Ghassamipour, A. R. Sardarian

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 237-242

Dodecylphosphonic acid is a solid Bronsted acid that catalyzes efficiently the preparation of dihydropyrimidinones by Biginelli condensation under solvent-free conditions. This protocol offers several advantages including high yields, short reaction times, easy work-up, and use of cheap, relatively moderate acidic and safe catalyst.

article

Synthesis and Regioselective Hydrolysis of Novel Dialkyl 4-Imidazolyl-1,4-Dihydropyridine-3,5-dicaroxlates as Potential Dual Acting Angiotensin II Inhibitors and Calcium Channel Blockers

J. Shahbazi Mojarrad, H. Nazemiyeh, F. Kaviani

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 171-179

Most of the known effects of angiotensin II are mediated via AT₁ receptor by increasing intracellular Ca²⁺ by influx of extracellular Ca²⁺. Combination therapies of angiotensin receptor blocker (ARB) with calcium channel blocker (CCB) which act through L-type calcium channel have beneficial therapeutic and protective effects on cardiovascular system. Thus, it was hypothesized that merging the key...

article

Enantioselective addition of diethylzinc to aryl aldehydes catalyzed by novel chiral imino alcohol ligands

P. Salehi, M. Dabiri, G. Kozehgary

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 100-106

The enantioselective alkylation of aryl aldehydes by diethylzinc in the presence of catalytic amounts of several novel chiral imino alcohol ligands, synthesized from the reaction of (R)-2-amino-1-butanol with aromatic aldehydes, was studied. The influence of temperature and ligand structure was investigated and enantioselectivity up to 81% was obtained.

article

A novel, fast and efficient one-pot four-component procedure for preparation of some alkyl spiro[indeno[1,2-b]quinoxaline-11,3′-pyrrolizine]-2′-carboxylates

A. Alizadeh Karsalary, M. R. Mohammadizadeh, A. R. Hasaninejad, A. A. Mohammadi, more

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 45-50

In this study we report a novel one-pot reaction which stereoselectively affords alkyl spiro[indeno[1,2-b]quinoxaline-11,3′- pyrrolizine]-2′-carboxylates via the four-component condensation of ninhydrin, phenylenediamines, proline, and acrylic acid derivatives. The reactions were run in ethanol and completed at less than 25 min and the products were obtained in very good yields. The stereochemistry...

article

Silica-supported LiHSO₄ as a highly efficient, heterogeneous and reusable catalytic system for the solvent-free synthesis of β-enaminones and β-enamino esters

A. Hasaninejad, A. Zare, M. R. Mohammadizadeh, M. Shekouhy

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 69-76

A highly efficient, simple and green procedure for the synthesis of β-enaminones and β-enamino esters is described. The reaction of aromatic and aliphatic amines with β-dicarbonyl compounds using catalytic amount of silica-supported LiHSO₄ (LiHSO₄/SiO₂) under solvent-free conditions at 80 °C affords the title compounds in high to excellent yields and in short reaction times.

article

A simple method for derivation of the rovibrational Hamiltonian: application to orthogonal radau coordinate systems as special cases

H.P. Ebrahimi, M. Tafazzoli, R. Islampour

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 77-83

The molecular Hamiltonian of polyatomic molecules has been obtained. A general choice of internal coordinates depending on external parameters was considered. The rovibrational Hamiltonian for this set of coordinate system was derived in general terms as a function of the external parameters a and b. This procedure is also applicable to various kinds of internal coordinates in a straightforward way...

article

Molecular iodine: An efficient catalyst for the one-pot synthesis of primary 1-aminophosphonates

S. Sobhani, A. Vafaee

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 227-236

A new and convenient procedure has been developed for the one-pot synthesis of different types of primary 1- aminophosphonates from aldehydes/ketones, HMDS and diethyl phosphite using I₂ as an inexpensive, non-toxic, non-metallic and readily available catalyst. These reactions proceeded under solvent-free conditions and produced the desired products in high yields.

article

Synthesis of new lariat ethers containing polycyclic phenols and heterocyclic aromatic compound on graphite surface via mannich reaction

H. Sharghi, R. Khalifeh, A. R. Salimi Beni

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 275-288

Synthesis of novel lariat ethers containing polycyclic phenols and heterocyclic aromatic compound using graphite via Mannich reaction are herein described. For this purpose N-(methoxymethyl) azacrown ether 4 was synthesized in nearly quantitative yield. The reaction of N-(methoxymethyl) azacrown ether 4 with polycyclic phenols and heterocyclic aromatic compound was performed in 10-20 min in the presence...

article

The effects of copper ions on the catalytic degradation of azo dye acid chrome dark blue

J. W. Fan, X. H. Liu, Y. N. Huang, L. T. Pan

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 134-141

The effect of Cu²⁺ on the catalytic degradation of Acid chrome dark blue (ACDB) in UV-TiO₂ process and Fenton process was studied. In these two processes, Cu²⁺ markedly inhibited the degradation of ACDB. These inhibition effects had an obvious relationship with the concentration of Cu²⁺. The experimental results indicated that in pH 5.0 buffer solution, ACDB reacted with Cu²⁺ with the formation of...

article

A novel and efficient one-pot method to Biginelli-like scaffolds

M. Mirza-Aghayan, A. Moradi, M. Bolourtchian

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 269-274

A novel and efficient one-pot method for the preparation of fused ring 3,4-dihydropyrimidin-2(1H)-ones and thiones from cyclocondensation of aldehydes, cyclic ketones and urea or thiourea using a catalytic amount of cupric chloride under mild conditions reaction is described. This new method has the advantage to give high yields, to be completed in short reaction times and simple product isolation...

article

Studies on the Synthesis and Dynamic NMR Properties of 2-(Benzylidene amino)-N-[(R)-2-hydroxy-2-methyl-1-phenylpropyl]acetamide

H.A. Samimi, M. Mamaghani, K. Tabatabeian, H.R. Bijanzadeh

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 185-189

An efficient method was employed for the preparation of 2-(benzylideneamino)-N-[(R)-2-hydroxy-2-methyl-1-phenylpropyl] acetamide utilizing optically pure (R)-5,5-dimethyl-4-phenyloxazolidin-2-one. This product showed interesting dynamic NMR properties for the methylene protons adjacent to the azomethine group (ΔG^‡ = 15.1 ± 0.1 kcal mol^-1).

article

Kinetics study of electrochemically induced michael reaction of benzoquinones with triphenylphosphine

D. Nematollahi, R. Esmaili

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 260-268

The electrochemical oxidation of 3,4-dihydroxybenzaldehyde (1), 3,4-dihydroxybenzoic acid (2) and 2,5-dihydroxybenzoic acid (3) were studied in the presence of triphenylphosphine (4) as a nucleophile using cyclic voltammetry and controlled-potential coulometry. The results indicate that the quinones derived from oxidation of 3,4-dihydroxybenzaldehyde, 3,4-dihydroxybenzoic acid and 2,5-dihydroxybenzoic...

article

Synthesis, Structure, Photoluminescence and Theoretical Study of (N,N′-Dimethyl-4,4′-bipyridinium)[Cd₂(μ ₂-Cl)₄Cl₂]_n with N,N′-Dimethyl-4,4′-bipyridinium Generated in Situ

W. Chen, Z. Yao, S. Ying, D. Liu, more

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 180-184

The title complex, (N,N′-dimethyl-4,4′-bipyridinium)[Cd₂(μ ₂-Cl)₄Cl₂]_n (1), in which the N,N′-dimethyl-4,4′-bipyridinium was generated in situ, was synthesized via hydrothermal reaction. X-Ray diffraction analysis revealed that the structure of 1 consisted of MV ²⁺ (MV ²⁺ = N,N′-dimethyl-4,4′-bipyridinium) cationic moieties and infinite [Cd2(μ ₂-Cl)₄Cl₂]_n anionic chains. The cadmium atom was bound...

article

Chemical composition and In vitro antioxidant and antidiabetic activities of Eucalyptus Camaldulensis Dehnh. essential oil

S. Sahin Basak, F. Candan

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 216-226

The present study was designed to determine the composition of the essential oil of Eucalyptus camaldulensis Dehnh. leaves and to examine its in vitro antioxidant and antidiabetic activities. The chemical composition of the essential oil from Eucalyptus camaldulensis Dehnh. leaves was analyzed by GC/GC-MS, twenty-nine compounds representing 99.10% of the total oil were identified. The major components...

article

High performance liquid chromatographic determination of butamyrate citrate in pharmaceutical preparation

E. S. M. Abu-Nameh, A. Hussein, I. I. Duraidi

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 210-215

An HPLC method was developed and validated for the determination of butamyrate citrate. The HPLC separation was achieved on a diol column (300 × 4.6 mm) packed with 5.0 μm particle size using a mobile phase of ammonium acetate buffer (pH = 6.5) and methanol (750:250, v/v) at a flow rate of 1.4 ml min⁻¹. The UV detector was operated at 225 nm. The method was validated for specificity, linearity, precision,...

article

Influence of metal ions on oscillatory behavior of zinc anode in nitric acid-potassium dichromate media

F. Crisan, E. Sallo

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 150-154

A zinc anode in acidic media is a new oscillatory electrochemical system which manifests interesting behaviors, from steady states to simple oscillations and chaos. This paper presents an experimental study of the influence of metal ions on the shape, amplitude and duration of the cell potential oscillations, and gives a qualitative explanation of the system’s behavior. A small quantity of Cu²⁺, Zn...

article

Thermodynamic study of the interaction of Co(II)-Schiff base complexes with phosphines

M. Asadi, M. Mohammadikish, K. Mohammadi

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 195-201

The equilibrium constants and the thermodynamic parameters for the interaction of CoL^x (L¹ = 5-OMe-salabza, L² = salabza, L³ = 5-Br-salabza and L⁴ = 5-NO₂-salabza) as acceptors, with phosphines (PBu₃, PPh₂Me) as donors in dichloromethane were studied. This was performed by using UV-Vis spectrophotometry titration for 1:1 adduct formation of the selected complexes at various temperatures (T = 283–298...

article

Oxidation of 2,6-Di-tert-butylphenol by dioxygen catalyzed by tetrasodium phthalocyaninatocobalt(II) tetrasulfonate in aqueous micellar media

M. Hassanein, M. Sakaran, S. Shendy

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 128-133

The oxidation of 2,6-di-tert-butylphenol by dioxygen has been investigated in aqueous micellar aggregates of cetyltrimethylammonium bromide (CTAB) using tetrasodium phthalocyaninatocobalt(II) tetrasulfonate (CoPcTsNa₄) as catalyst. The CTAB/CoPcTsNa4 system showed enhanced catalytic activity in the oxidation of 2,6-di-tert-butylphenol compared to that observed in the oxidation reaction in the absence...

article

Multi-linear gradient elution optimization for separation of phenylthiohydantoin amino acids using pareto optimality method

M. R. Hadjmohammadi, K. Kamel

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 107-113

Multi-linear gradient elution was applied for simultaneous optimization of resolution and analysis times for ten phenylthiohydantoin amino acids (PTH-AAs) in liquid chromatography. Relation of lnK upon φ for each analyte was determined using isocratic retention time data, and gradient retention time of analytes was predicted using fundamental equation of gradient elution. Then a grid search program...

article

Zr(HSO₄)₄/SiO₂: An effective heterogeneous alternative for one-pot synthesis of β-acetamido ketones

B. F. Mirjalili, A. Bamoniri, M. A. Karimi Zarchi, H. Emtiazi

Journal of the Iranian Chemical Society > 2010 > 7 > 1 > 95-99

In a one-pot procedure, enolizable ketones reacted with aromatic aldehydes, acetyl chloride and acetonitrile at room temperature in the presence of Zr(HSO₄)₄/SiO₂ to furnish the corresponding β-acetamido ketones in improved yields.

Number:
1
Volume:
7
Year:
2010

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Keywords

SCHIFF BASE (3)
SOLVENT-FREE (2)
EC MECHANISM (1)
EUCALYPTUS CAMALDULENSIS DEHNH (1)
IN SITU (1)
S-TRIAZOLES (1)
1,4-DIHYDROPYRIDINE (1)
1-AMINOPHOSPHONATES (1)
2,6-DI-TERT-BUTYL-PHENOL (1)
3,4-DIHYDROPYRIMIDIN-2(1H)-ONES (1)
3,4-DIHYDROXYBENZALDEHYDE (1)
ACETAMIDE (1)
ACID CHROME DARK BLUE (1)
ACTIN-ASSEMBLY INDUCING PROTEIN GENE (1)
ALDEHYDES (1)
ALKYL ACRYLATES (1)
ALKYL SPIRO[INDENO[1,2-B]QUINOXALINE-11,3′-PYRROLIZINE]-2′-CARBOXYLATES (1)
ALKYLATION (1)
ANGIOTENSIN II ANTAGONIST (1)
ANTIBACTERIAL ACTIVITY (1)
ANTIFUNGAL AND ANTIBACTERIAL ACTIVITIES (1)
ANTIOXIDANT ACTIVITY (1)
ANTITUMOR ACTIVITY (1)
APPLICATION (1)
APPLICATIONS (1)
AQUEOUS TWO-PHASE SYSTEM (S) (1)
ARYL ALDEHYDES (1)
ATP (1)
AZACROWN ETHER (1)
AZOMETHINE YLIDE (1)
BIGINELLI CONDENSATION (1)
BIGINELLI-LIKE SCAFFOLD (1)
BIOLOGICAL ACTIVITY (1)
BUTAMYRATE CITRATE (1)
CADMIUM (1)
CALCIUM CHANNEL BLOCKER (1)
CARBON PASTE ELECTRODE (1)
CATALYSIS (1)
CHAOS (1)
CHARACTERIZATION (1)
CHEMICAL SHIELDING (1)
CHIRAL AUXILIARY (1)
CHIRAL AZOMETHINE (1)
COBALT (1)
COBALT COMPLEX (1)
COBALTPHTHALOCYANINE (1)
COMBINATORIAL FACTOR (1)
COPPER IONS (1)
CRYSTAL STRUCTURE (1)
CUPRIC CHLORIDE (1)
DICHROMATE (1)
DIETHYL PHOSPHITE (1)
DIETHYLZINC (1)
DIGITAL SIMULATION (1)
DIHYDROPYRIMIDINONE (1)
DIOXYGEN (1)
DODECYLPHOSPHONIC ACID (1)
DUAL MECHANISM (1)
DYNAMIC NMR (1)
ELECTRIC FIELD GRADIENT (1)
ELECTROCATALYSIS (1)
ELECTROCHEMICAL DNA BIOSENSOR (1)
ENANTIOSELECTIVE (1)
EQUILIBRIUM CONSTANT (1)
ESSENTIAL OIL (1)
FENTON-PROCESS (1)
FUSED RING (1)
GC-MS (1)
GENERALIZED INTERNAL COORDINATES (1)
GRAPHITE (1)
GREEN CHEMISTRY (1)
GTP (1)
HETEROGENEOUS (1)
HOMOGENEOUS RATE CONSTANT (1)
HOMOSELECTIVITY (1)
HPLC (1)
HYBRID MATERIAL (1)
HYBRIDIZATION INDICATOR (1)
HYDROGEN BOND (1)
HYDROTHERMAL REACTION (1)
HYDROXYLAMINE HYDROCHLORIDE (1)
IMINO-ALCOHOLS (1)
INTRAMOLECULAR HYDROGEN BOND (1)
IODINE (1)
IONIC LIQUID (1)
ISING MODEL (1)
KETONES (1)
L-CYSTEINE (1)
LIHSO4/SIO2 (1)
MAGNETIC NANOPARTICLES (1)
MANNICH REACTION (1)
METAL BROMIDE (1)
METAL IONS (1)
MICROWAVE IRRADIATION (1)
MIXED METAL PHOSPHONATE (1)
MULTI-COMPONENT REACTION (1)
MULTI-LINEAR GRADIENT ELUTION (1)
NINHYDRIN (1)
NITRIC ACID (1)
ONE-POT METHOD (1)
more

INFONA - science communication portal

Journal of the Iranian Chemical Society

One-Pot synthesis of dihydropyrimidinones by dodecylphosphonic acid as solid Bronsted Acid Catalyst under Solvent-Free Conditions via Biginelli condensation

Synthesis and Regioselective Hydrolysis of Novel Dialkyl 4-Imidazolyl-1,4-Dihydropyridine-3,5-dicaroxlates as Potential Dual Acting Angiotensin II Inhibitors and Calcium Channel Blockers

Enantioselective addition of diethylzinc to aryl aldehydes catalyzed by novel chiral imino alcohol ligands

A novel, fast and efficient one-pot four-component procedure for preparation of some alkyl spiro[indeno[1,2-b]quinoxaline-11,3′-pyrrolizine]-2′-carboxylates

Silica-supported LiHSO₄ as a highly efficient, heterogeneous and reusable catalytic system for the solvent-free synthesis of β-enaminones and β-enamino esters

A simple method for derivation of the rovibrational Hamiltonian: application to orthogonal radau coordinate systems as special cases

Molecular iodine: An efficient catalyst for the one-pot synthesis of primary 1-aminophosphonates

Synthesis of new lariat ethers containing polycyclic phenols and heterocyclic aromatic compound on graphite surface via mannich reaction

The effects of copper ions on the catalytic degradation of azo dye acid chrome dark blue

A novel and efficient one-pot method to Biginelli-like scaffolds

Studies on the Synthesis and Dynamic NMR Properties of 2-(Benzylidene amino)-N-[(R)-2-hydroxy-2-methyl-1-phenylpropyl]acetamide

Kinetics study of electrochemically induced michael reaction of benzoquinones with triphenylphosphine

Synthesis, Structure, Photoluminescence and Theoretical Study of (N,N′-Dimethyl-4,4′-bipyridinium)[Cd₂(μ ₂-Cl)₄Cl₂]_n with N,N′-Dimethyl-4,4′-bipyridinium Generated in Situ

Chemical composition and In vitro antioxidant and antidiabetic activities of Eucalyptus Camaldulensis Dehnh. essential oil

High performance liquid chromatographic determination of butamyrate citrate in pharmaceutical preparation

Influence of metal ions on oscillatory behavior of zinc anode in nitric acid-potassium dichromate media

Thermodynamic study of the interaction of Co(II)-Schiff base complexes with phosphines

Oxidation of 2,6-Di-tert-butylphenol by dioxygen catalyzed by tetrasodium phthalocyaninatocobalt(II) tetrasulfonate in aqueous micellar media

Multi-linear gradient elution optimization for separation of phenylthiohydantoin amino acids using pareto optimality method

Zr(HSO₄)₄/SiO₂: An effective heterogeneous alternative for one-pot synthesis of β-acetamido ketones

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