Journal of Chemistry

https://www.hindawi.com/journals/jchem/

List of Papers (Total 6,308)

RP-HPLC Method for the Determination of Cinitapride in the Presence of its Degradation Products in Bulk Drug

A reverse phase HPLC method is described for the determination of cinitapride hydrogen tartrate in the presence of its degradation products in bulk drug. A drug was subjected to all stress conditions such as reduction, oxidation acidic and alkaline medium. Chromatography was recorded on an Intersil ODS-3 column using mixture of acetonitrile and phosphate buffer, pH adjusted to 6...

Studies on the Solute Solvent Interaction of Nimesulide in Aqueous Solutions of Hydrotropic Agents at Different Temperatures

The present study deals with experiments so as to highlight the solute (drug nimesulide) - solvent(water) interactions and related modifications in case of the presence of hydrotropic agents at different temperatures T(=298.15 to 313.15)K. Density and viscosity values of nimesulide have been determined in water in (0.1, 0.2, 0.4, 0.6, 0.8, 1 and 2) mol dm-3 aqueous solutions of...

Thermal Properties of Some Organic Liquids Using Ultrasonic Velocity Measurements

Debye temperature and thermal relaxation time has been calculated in normal and boiling temperature. Using thermal relaxation time, the heat of fusion has been calculated for nineteen organic liquids and the results throw light on the method of calculating heat of fusion.

H2SO4-Silica Catalyzed One-Pot and Efficient Synthesis of Dihydropyrimidinones Under Solvent-Free Conditions

H2SO4-Silica efficiently catalyzes the three-component condensation reaction of aldehydes, 1,3-dicarbonyl compounds and urea/thiourea under solvent free conditions to afford the corresponding dihydropyrimidinones and thio-derivatives in high yields. Compared to the classical Biginelli reaction conditions, this new method consistently has the advantage of giving good yields and...

Study of Physicochemical Parameters of Groundwater Quality of Kopargaon Area, Maharastra State, India duringPre-monsoon and Post-monsoon Seasons

The physicochemical parameters were studied for water samples collected from different locations in Kopargaon area; It is one of the important taluka of Ahmednagar district, Maharastra state, India. The main purpose of the study was to ascertain the quality of water for drinking from selected locations. Assessment of water quality was done by comparing the parameters with...

Microwave-Assisted, One-Pot Three Component Synthesis of 2-Phenyl H-imidazo[1,2-α]pyridine

A novel synthesis of 2-phenylH-imidazio[1,2-α] pyridines is described from a one-pot, three-component reaction between pyridine, guanidine (urea or thiourea) and α-bromoketones under microwave irradiation and solvent-free conditions in excellent yields.

Three Component Synthesis of Substituted 4H-[1,3]Dioxin Derivatives Under Solvent-Free Conditions

Reaction between aryl aldehydes, acetylacetone and alkyl isocyanides in solvent-free conditions provided a simple and efficient one-pot route for the synthesis of 1-(2-alkylamino-6-methyl-4-aryl-4H-[1,3]dioxin-5-yl)ethanone derivatives in excellent yields.

Photocatalytic Degradation of Thiram (Fungicides) under Visible Light Irradiation

Pesticides in the different form are toxic to the environment and removal of its form the various sources is a difficult task. The thiram undergoes photocatalytic degradation under visible light when prepared TiO2∼PVA polymer composite was used as a photocatalyst. The data represent that prepared TiO2∼PVA polymer composite is a more efficient photocatalyst than the neat TiO2...

Theoretical Evaluation of Refractive Index in Binary Liquid Mixtures

The density and refractive index (RI) for four binary liquid mixtures: diethyl malonate

Pinacol Coupling Reaction of Benzaldehyde Mediated by TiCl3-Zn in Basic Media Under Ultrasound Irradiation

Pinacol coupling of benzaldehyde mediated by TiCl3-Zn in basic media under ultrasound irradiation can lead to the corresponding pinacol rapidly. The optimum reaction condition is chosen.

Cobalt and Nickel Complexes Bearing 2,6-Bis(imino)phenoxy Ligands:Synthesis and Ethylene Oligomerization Study

A series of new cobalt and nickel complexes MLX2 (M = Co or Ni, X = Cl) bearing 2,6-bis(imino)phenoxy ligands have been synthesized. Treatment of the complexes with methylaluminoxane (MAO) leads to active catalysts for ethylene oligomerization. The oligomers are olefins from C4 to C6.

Kinetics of Oxidation of Glutathione by Micelle Trapped Tris(benzhydroxamato)iron(III)

Kinetics of the oxidation of glutathione (GSH) by micelle Sodium dodecyl sulphate (SDS) trapped tris(benzhydroxamato)iron(III) (TBH) at pH 3.3 and at 298 K has been described. The reaction is first order in TBS and GSH. Increase in pH decreased the rate. Order in H

Synthesis of Nano-Crystalline LiNdxMn2-xO4 Powder by Novel Cam-Microwave Assisted Sol-Gel Method

With the advancement of nanotechnology, there is an interest in the replacement of conventional materials by nanomaterials. There is a reasonable chance that as the active mass of electrode for lithium batteries is comprised of smaller particles, they will perform better in terms of capacity, power, rate capability and stability. LiMn2O4 is inexpensive material but it shows...

Theoretical Study of Rotational Spectroscopy of Acetonitrile-d3 in the Ground and Different Excited Vibrational States

The millimeter-wave rotational spectra of the ground and excited vibrational states v8 = 1 and v8 = 2 of the symmetric top molecule CD3CN have been analyzed again. The l = ± 1 in v8 =1, l = 0 and l = ± 2 series in v8 = 2 states have been assigned respectively. The assignment and analysis of the measurements with a least – squares procedure have made it possible to obtain the...

Determination of Free Levels of Cinitipride in Human Plasma by Liquid Chromatography-Tandem Mass Spectrometry

A rapid, sensitive and specific method to quantify cinitapride in human plasma using risperidone as the internal standard is described. Sample preparation involved simple solid phase extraction procedure. The extract was analyzed by high performance liquid chromatography coupled to electrospray tandem mass spectrometry API-4000 (LC-MS/MS). Chromatography was performed...

Synthesis and Antimicrobial Activity of Some Chalcone Derivatives

In an effort to develop antimicrobial agents, a series of chalcones were prepared by Claisen-Schmidt condensation of appropriate acetophenones with appropriate aromatic aldehydes in the presence of aqueous solution of potassium hydroxide and ethanol at room temperature. The synthesized compounds were characterized by means of their IR, 1H-NMR spectral data and elemental analysis...

Synthesis and Antimicrobial Activities of 1,2,4-Triazole and 1,3,4-Thiadiazole Derivatives of 5-Amino-2-Hydroxybenzoic Acid

Various 4-amino-2-[4-(4-substituted phenyl)-5-sulfanyl-4H-1,2,4-triazol-3-yl] phenol (4a-c), 4-amino-2-{4-amino-5-[(4-substituted phenyl)amino]-4H-1,2,4-triazol-3-yl} phenol (5a-c) and 4-amino-2-{5-[(4-substituted phenyl)amino]-1,3,4-thiadiazole-2-yl} phenol (6a-g) were synthesized and evaluated for their antibacterial and antifungal activity. The compounds showed significant...

Synthesis and Biological Activity of Some 3,5-Diaryl-1-Benzothiazolopyrazoline Derivatives: Reaction of Chalcones with 2-Hyrazinobenzothiazoles

A series of 3,5-diaryl-1-benzothiazolopyrazoline derivatives were synthesized by the reaction of appropriately substituted chalcones and 2-hydrazinobenzothiazole in ethanol. The synthesized heterocycles have been characterized on the basis of their chemical properties and spectroscopic data. These compounds were tested for biological activity against a variety of test organisms.

Synthesis of Multi-substituted 4,5-Dihydrofuran Derivatives from (S)-Limonene and 1,3-Dicarbonyl Compounds and their Biological Activities

Multi-substituted 4,5-dihydrofuran derivatives were regioselectively synthesized by the reaction of α-carbo radical produced from 1,3-dicarbonyl compounds by oxidation with Mn(OAc)3 in Acetic acid and S-(-)-limonene. All the compounds were tested for their antibacterial and antifungal activities by the disc-diffusion technique.

Synthesis and Biological Activity of 3-Chloro-1-(4-perimidine methylcarbonylamino)-4-phenyl-azetidin-2-one

Perimidine-1-acetic acid hydrazide (1) undergoes facile condensation with aromatic aldehydes to afford the corresponding azomethine (i.e. Schiff base) derivatives (2a-h) in good yield. Cyclocondensation of compounds (2a-h) with chloro acetyl chloride affords 3-chloro-1-(4-perimidine methylcarbonylamino)-4-phenyl-azetidin-2-ones (3a-h). The structures of these compounds were...

In Silico Screening, Synthesis and In Vitro Evaluation of Some Quinazolinone and Pyridine Derivatives as Dihydrofolate Reductase Inhibitors for Anticancer Activity

Dihydrofolate reductase (DHFR) is the important target for anticancer drugs belonging to the class of antimetabolites as the enzyme plays important role in the de novo purine synthesis. We here report the in silico screening to obtain best fit molecules as DHFR inhibitors, synthesis of some ʻbest fitʼ quinazolinone from 2-phenyl-3-(substituted-benzilidine-amino) quinazolinones...

Antioxidant and Hypolipidemic Effect of Plumeria Rubra L. in Alloxan Induced Hyperglycemic Rats

Antioxidant and hypolipidemic activity of the flovone glycoside isolated from Plumeria rubra L. was carried in alloxan induced hyperglycemic rats. The flavonoid treatment produced a significant reduction in the level of serum triglycerides, while there was no reduction in the serum cholesterol and glucose. Antioxidant activity of the drug was also confirmed through in vitro studies.

Phytochemical and Antimicrobial Properties of Leaves of Alchonea Cordifolia

The phytochemistry of Achornea cordifolia leaf extract using different solvents was studied using standard methods. The effects of the leaf extract on some pathogenic bacteria and fungi were also examined. The Phytochemical screening of the leaves shows the presence of useful ethno-botanical bioactive substances such as tannin, saponin, flavonoid, cardiac glycoside and...

Selective Extraction and Bulk Liquid Membrane Transport of Cu(II) from Aqueous Nitrate Solution in the Presence of Zn(II), Ni(II) and Mn(II) Cations Using Benzoyl Acetone

The competitive metal ion extraction and transport of Cu(II), Ni(II), Zn(II) and Mn(II) with benzoyl acetone and EDTA was studied. In the experiments the ligand was dissolved in chloroform and the pH and time of extraction or transport were varied. Also the rate of shaking and ligand concentration on the efficiency of extraction and transport was studied. The results revealed...

Physicochemical and Heavy Metals Assessments of Leachates from Aperin Abandoned Dumpsite in Ibadan City, Nigeria

Leachates from Aperin dumpsite and control site in Ibadan city, were analysed for physicochemical properties and heavy metals levels. These parameters were compared with control samples and established international standards (FEPA) and (WHO). The dumpsite leachates contained very high concentration of TDS (2436±1035 mg/L) and significant concentrations of COD (395±135 mg/L), BOD...