Journal of Chemistry

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

List of Papers (Total 1,908)

QSAR Studies of 6-Amino Uracil Base Analogues: A Thymidine Phosphorylase Inhibitor in Cancer Therapy

A novel series of 6-amino uracil base analogue were synthesized. QSAR study was used to relate the selective nonsubstrate inhibitory activity of 6-amino uracil base analogue with various physicochemical descriptors. Stepwise multiple regression analysis was performed to find out the correlation between various physicochemical descriptors and biological activity of the compounds...

Acoustical Studies on Molecular Interactions in Binary Liquid Mixtures at 303 K

Molecular interaction studies using ultrasonic technique in the binary liquid mixtures of cyclohexanone with o-cresol and p-cresol have been carried out at 303 K. Using the measured values of ultrasonic velocity, density and viscosity, acoustical parameters and their excess values are evaluated. From the properties of these excess parameters the nature and strength of the...

Molecular Iodine: A Versatile Catalyst for the Synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione Derivatives in Ethanol

An efficient method for the synthesis of 2H-indazolo[2,1-b] phthalazine-1,6,11(13H)-trione derivatives by a three-component condensation reaction of dimedone, aromatic aldehydes and phthalhydrazide in the presence of a catalytic amount of molecular iodine in ethanol is described.

Chemical Studies on 3,6-Dichloropyridazine (Part 2)

3,6-Dichloropyridazine (1) reacted with 2-aminophenol, phenylalanine, acetophenone hydrazone derivatives, acid hydrazide derivatives and amino-aromatic acids (anthranilic acid and 5-bromoanthranilic acid) and yield the compounds (2), (3), (4a,b), (5a,b) and (6a,b) respectively. Reaction of compounds (5a,b) with acid hydrazide gave (8a,b). Also, compounds (6a,b) reacted with...

Synthesis and Antimicrobial Activity of Some New Piperazine Derivaties Containing Aryl Sulfonyloxy Group

Novel N-substituted piperazine derivatives containing sulfonyloxy aniline moiety have been prepared. The various 4-sulfonyloxy aniline (SA) derivatives (2a-h) have been prepared by the condensation reaction of N-Acetyl Sulfanilyl chloride (ASC) and sodium phenates followed by hydrolysis. The SA derivatives are then reacted with chloro acetyl chloride to give corresponding (N...

Determination of Trace Metals with Newly Synthesized Coniine Dithiocarbamate by Atomic Absorption Spectroscopy

A procedure is developed for the determination of Cd, Cu, Mo, Pb, Te and Ni in natural and spiked water by Atomic Absorption Spectroscopy (AAS) after preconcentration on a coniine dithiocarbamate supported by polyurethane. The sorbed elements are subsequently eluted with 5 mol L-1 HNO3 and the acid eluates are analysed by AAS. A 20 mL syringe served as a chromatographic...

Synthesis of Some New 2-Methyl -1,4-benzothiazine-3(1H)- one Derivatives as Potential Vasodilators

The increase in the internal diameter of a blood vessel that results from relaxation of smooth muscle within the wall of the vessel is vasodilation. This causes an increase in blood flow and a decrease in systemic vascular resistance. Some substances produced by tissue deprived of fresh blood seem to be responsible for the dilation. Many products of metabolism bring about the...

Kinetics and Mechanism of Oxidation of L-proline by Trivalent Copper: A free radical intervention and decarboxylation

The kinetics of oxidation of L-proline by diperiodatocuprate(III) (DPC) in aqueous alkaline medium at a constant ionic strength of 0.10 mol dm-3 was studied spectrophotometrically. The reaction between DPC and L-proline in alkaline medium exhibits 2:1 stoichiometry (DPC: L-Proline). The reaction is of first order in [DPC], less than unit order in [L-proline] and [alkali...

Synthesis of Novel Schiff Base and Azetidinone Derivatives and their Antibacterial Activity

A series of Compound 4-(2᾽-hydroxy-3᾽-chloro-5᾽-ethyl phen-1᾽-yl)-1-(4᾽-tolyl)-3-chloro-2-azetidinone 4a-j have been prepared by the reaction of 2 -hydroxy-3 -chloro-5 -ethyl-N-(p-tolyl)-chalconimines 3a-j with chloroacetyl chloride in the presence of triethylamine. The Schiff base derivatives 3a-j has been prepared by the condensation of different substituted chalone derivatives...

Synthesis, Spectral, Magnetic and Thermal Studies of the Complexes of CoII and NiII With Some Bidentate and Tridentate Hydrazone Ligands

The reaction of Co(NO3)2.6H2O and Ni(NO3)2.6H2O with hydrazones derived from 1-phenyl-3-methyl-4-acyl-5-pyrazolone (where acyl = acetyl, propionyl, butyryl and benzoyl) with 2-picolinic acid hydrazide have been studied and characterized on the basis of elemental analysis, magnetic moments, molar conductivity measurements, IR and electronic spectral studies and thermogravimetric...

Studies on Synthesis of Some Novel Heterocyclic Azlactone Derivatives and Imidazolinone Derivatives and their Antimicrobial Activity

p - Methyl benzoic acid on reaction with phosphorus pentachloride gives p - methyl benzoyl chloride derivative which on condensation with glycine gives p - methyl benzoyl glycine derivative. Now, this p - methyl benzoyl glycine derivative on condensation with various substituted aldehydes gives corresponding substituted 4 - [aryl methylidine] - 2 - [p - methyl phenyl] - oxazole...

Standardization Study of Antifertility Drug - Pippalyadiyoga

The present paper deals with the standardization study of pippalyadiyoga powder. It is used as a long acting contraceptive. The standardization of compound drug has been achieved by physico-chemical analysis and high performance liquid chromatography (HPLC) fingerprint studies. Quantitative evaluation of borax in pippalyadiyoga showed 19.08% as sodium borate. RP-HPLC was...

The Effect of Deposition Rate on Electrical, Optical and Structural Properties of ITO Thin Films

Indium tin oxide (ITO) thin films have been prepared using the reactive evaporation technique on glass substrates in an oxygen atmosphere. It is found that the deposition rate plays prominent role in controlling the electrical and optical properties of the ITO thin films. Resistivity, electrical conductivity, activation energy, optical transmission and band gap energy were...

Cobalt and Nickel Complexes Bearing 2-(2-pyridyl)-Benzimidazole: Synthesis and Ethylene Oligomerization

A series of cobalt and nickel complexes MLX2 (M=Co or Ni, X=Cl) bearing 2-(2-pyridyl)benzimidazole ligands were synthesized. Treatment of the complexes with methylaluminoxane (MAO) leads to active catalysts for ethylene oligomerization. The oligomers were olefins from C2 to C6.

Spectrophotometric Determination of Ziprasidone in Pharmaceutical Formulations

A simple and reproducible spectrophotometric method has been developed for the determination of Ziprasidone hydrochloride monohydrate (ZPS) in bulk and in dosage forms. The method is based on the extraction of the drugs into organic layer of the dye TPooo in presence of 0.1 N hydrochloric acid and the absorbances were measured at 490 nm. Results indicate that the proposed method...

Estimation of Some Antiviral Drugs Using Tpooo as Analytical Reagent

A simple and reproducible spectrophotometric method has been developed for the determination of two recent antiviral drugs namely Valacyclovir (drug A) and Famciclovir (drug B) in bulk and pharmaceutical dosage forms. The method is based on the extraction of the drugs into organic layer of the dye TPooo in presence of 0.1 N hydrochloric acid and the absorbances were measured at...

Synthesis and Antifungal Activity of Azetidinone and Thiazolidinones Derivatives of 2-Amino-6-(2-naphthalenyl)thiazolo[3,2-d]thiadiazole

2-Amino-6-(2-naphthalenyl)thiazolo[3,2-d]thiadiazole [1] was prepared by treatment of KCNS and Br2 on 2-Amino-4-(2-naphthalenyl) thiazole. This amine on facile condensation with aromatic aldehydes afford Schiff Base/anils/azomethines(2a-h). These anils on cyclocondensation reaction with chloro acetyl chloride and thio glycolic acid (i.e. mercapto acetic acid) afford 2...

Microwave Assisted Synthesis of Some Biologically Active Benzothiazolotriazine Derivatives

Synthesis of some biologically active benzothiazolotriazine derivatives by microwave irradiation is reported. 2-Amino-6-substituted benzothiazoles 1 on treatment with benzaldehyde in anhydrous ethanol afforded 2-benzylidenoimino-6-substitutedbenzothiazoles 2 which underwent cyclisation with ammoniumthiocyanate in dioxane to give 2-phenyl benzothiazolo [3,2-α]-s-triazine-4-[3H...

Synthesis and Antibiotic Activity of Mebendazole Derivatives of Pharmacological Interest

Mebendazole is a well known anti-helimintic and belongs to the benzimidazole group of medicines. In order to achieve better medicinal results, i.e. enhanced activity and low toxicity, structural modifications are made in the existing drugs. Some 5-benzoyl-N-[1-(alkoxyphthalimido) benzimidazol-2-yl] carbamic acid methyl ester (3a-c) and 5-benzoyl-N-[1-(2,3-bis oxyphthalimido...

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

Effect of Additives on Some Physical Parameters of Palm Oil

Effect of additives (carrot, lime, paw paw and red dye) on the density, viscosity, moisture content and melting point of palm oil (PO) was investigated by dissolving 1g of each additive to 10 mL of pre-analysed oil in a beaker. The mixture was heated and their their moisture content, melting point, viscosity and density were determined. The result of the analysis shows that all...

Assessment of Ground Water Quality in and around Gobichettipalayam Town Erode District, Tamilnadu

Ground water samples collected from different localities in and around Gobichettipalayam town, Erode District, Tamil Nadu were analyzed for their physico- chemical characteristics. This analysis result was compared with the WHO & ICMR standards of drinking water quality parameters with the following water quality parameters namely pH, Electrical conductivity, CN-, Cl-, SO42-, Na

in vitro Antioxidant Activity and Total Polyphenolic Content of Cyperus rotundus Rhizomes

In this study, Antioxidant activity of Cyperus rotundus rhizomes extract (CRRE) was evaluveted in a series of in vitro assay involving free radicals and reactive oxygen species and IC50 values were determined. CRRE exhibited its scavenging effect in concentration dependent manner on superoxide anion radicals, hydroxyl radicals, nitric oxide radical, hydrogen peroxide, and...

New Diazo Coupling Reactions for Visible Spectrophotometric Determination of Alfuzosin in Pharmaceutical Preparations

Simple, rapid and sensitive spectrophotometric procedures were developed for the analysis of Alfuzosin hydrochloride (AFZ) in pure form as well as in pharmaceutical formulations. The methods are based on the reaction of AFZ with nitrite in acid medium to form diazonium ion, which is coupled with ethoxyethylenemaleic ester (Method A) or ethylcyanoacetate (Method B) or acetyl...