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  Subjects -> CHEMISTRY (Total: 773 journals)
    - ANALYTICAL CHEMISTRY (45 journals)
    - CHEMISTRY (537 journals)
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CHEMISTRY (537 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal   (Followers: 3)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 31)
ACS Catalysis     Full-text available via subscription   (Followers: 24)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 13)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 8)
ACS Macro Letters     Full-text available via subscription   (Followers: 17)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 25)
ACS Nano     Full-text available via subscription   (Followers: 270)
ACS Photonics     Full-text available via subscription   (Followers: 2)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 8)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 6)
Acta Chromatographica     Full-text available via subscription   (Followers: 10)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 4)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 3)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 4)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 8)
Advanced Functional Materials     Hybrid Journal   (Followers: 34)
Advances in Chemical Engineering and Science     Open Access   (Followers: 21)
Advances in Chemical Science     Open Access   (Followers: 8)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 13)
Advances in Drug Research     Full-text available via subscription   (Followers: 17)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 7)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 12)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 13)
Advances in Nanoparticles     Open Access   (Followers: 11)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Polymer Science     Hybrid Journal   (Followers: 38)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 10)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 4)
African Journal of Chemical Education     Open Access   (Followers: 1)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 4)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access  
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alchemy     Open Access   (Followers: 3)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 4)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 165)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 11)
American Journal of Chemistry     Open Access   (Followers: 17)
American Journal of Plant Physiology     Open Access   (Followers: 9)
American Mineralogist     Full-text available via subscription   (Followers: 2)
Analyst     Full-text available via subscription   (Followers: 35)
Angewandte Chemie     Hybrid Journal   (Followers: 16)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 213)
Annales UMCS, Chemia     Open Access   (Followers: 2)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 1)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 2)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 10)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 12)
Anti-Infective Agents     Hybrid Journal   (Followers: 1)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 4)
Applied Spectroscopy     Full-text available via subscription   (Followers: 12)
Applied Surface Science     Hybrid Journal   (Followers: 14)
Arabian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 4)
Autophagy     Full-text available via subscription   (Followers: 1)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 205)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 4)
BioChip Journal     Hybrid Journal   (Followers: 1)
Bioinorganic Chemistry and Applications     Open Access   (Followers: 4)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 17)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 5)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 30)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 24)
Bioorganic Chemistry     Hybrid Journal   (Followers: 5)
Biopolymers     Hybrid Journal   (Followers: 13)
Biosensors     Open Access   (Followers: 3)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 12)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 3)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 1)
Carbohydrate Research     Hybrid Journal   (Followers: 10)
Carbon     Hybrid Journal   (Followers: 38)
Catalysis for Sustainable Energy     Open Access   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 4)
Catalysis Science and Technology     Free   (Followers: 4)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysts     Open Access   (Followers: 6)
Cellulose     Hybrid Journal   (Followers: 4)
Central European Journal of Chemistry     Hybrid Journal   (Followers: 5)

        1 2 3 4 5 6 | Last

Chemistry and Materials Research
   Journal TOC RSS feeds Export to Zotero [11 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2224-3224 - ISSN (Online) 2225-0956
     Published by International Institute for Science, Technology and Education (IISTE) Homepage  [30 journals]
  • Effect of Mastery Learning Approach on Secondary School Students
           Achievement in Chemistry in Rivers State Nigeria

    • Authors: Pepple Tamunosisi Furo
      Abstract: The study examined the effect of mastery learning on secondary school achievement in chemistry. It adopted  a quasi experimental design. A fifty (50) item multiple choice option of chemistry Achievement test constructed from chemical strometer, mole concept, electrolysis, acid, base and salt) was used for the collection of protest posttest scores. A 2x2x2 factorial design was used. The analysis of covariance ANCOVA was used in testing significance and validity of different variables used in the hypothesis. The Statistical Package for the Social Sciences (SPSDS) was used for data analysis, to enhance accuracy of the result obtained. The resu1ts show that the mean difference in academic achievement between the two teaching approaches was in favour of the experimental group was very minimal   (F(1.157=83,378, p=0.000), It also indicates that the mean difference in achievement between the male and female between the urban and rural students of the experimental group is very minimal (F(l, 77=1.233, p=2.70). It revered that the mean difference in achievement between the male and the female urban students of the experimental group was very minimal (F(I, 37=.871, p=357). It indicates that the mean difference in academic achievement between the male and the female rural students of the experimental group is very minimal F1, = 1.667, P = .205). The experimental group (mastery learning) performed significantly better than the control group (conventional teaching method); government should motivate teachers by ensuring good conditions of service, considering that mastery learning strategy demand absolute dedication on the part of teachers, the schools should allow more flexibility in the time assigned to teach a unit of subject in order to attain mastery. Key Words: Mastery Learning, Conventional Teaching Method, Academic, Achievement School Location, Gender.
      Issue No: Vol. 6
       
  • Synthesis and Characterisation of Cardanol Acetate and Cardanol Ether as
           Reactive Diluents for Alkyd Coatings

    • Authors: Njuku; F.W, Muturi, P. M, Thiong’o, G. T
      Abstract: Alkyd resins are viscous, tacky materials that are difficult to handle. Most often, these handling problems are overcome by dissolving the resins in organic solvents, which evaporate into the atmosphere as volatile organic compound (VOC), giving rise to regulations. A reactive diluent is a compound that acts as a solvent in the liquid paint, lowering the viscosity, and chemically reacts into the final film during the curing process to give a more environmentally friendly coating and the amount of traditional solvent can be decreased. Cashew nut shell liquid (CNSL) is not currently utilized in Kenya and the objective of this work was to develop reactive diluents from chemically modified CNSL products and evaluate their compatibility with alkyd coatings. A standard reactive diluent should have low viscosity, increase drying time of less than 50 %, and be nontoxic. Cardanol was isolated using methanol and ammonia solution as the solvents in a ratio of 8:5 respectively. The percentage yield of cardanol obtained was 63.94 %. The yield of cardanol acetate obtained was 58.94 %. The cardanol acetate was also characterized by FT-IR and it showed the presence of the C=O stretch functional group characteristic of the ester and the absence of the OH group that was present in cardanol. The cardanol acetate synthesised showed a low viscosity (45 Cps) and a reduced drying time of about 25–35% compared to conventionally prepared formulations. Keywords: Cashew nut shell liquid, Cardanol, Reactive diluent, Cardanol acetate.
      Issue No: Vol. 6
       
  • Fermentation of Soursop using Saccharomyces Cerevisiae: A Kinetic
           Evaluation

    • Authors: Ogbebor; C, Akpoveta, V.O., Egharevba, F, Odia, A, Jatto, E.O, Assiagwu, K.A
      Abstract: A kinetic evaluation of the fermentation of soursop (Substrate) by Saccharomyces cerevisiae (yeast enzyme) was conducted by determining the effect of various parameters (such as Temperature, substrate, pH, and Yeast concentration) on the rate of production of CO­2. The results showed that the rate of fermentation increased in proportion with Temperature (optimum 32-36oC), Substrate (optimum 50%v/v), pH (optimum 5.0) and Yeast concentration (optimum 3.5-4.5%w/v) up to a point and decreased. The kinetic parameters evaluated are maximum rate of reaction Vmax (1.79x102MS-1); catalytic constant, k2 (8.0x10-2 dm3 mol-1S-1); overall rate constant, k (1.79x102); order of initial reaction (first order); dissociation constant of enzyme-substrate complex, ks (1.64x102); Michaelis constant, km (1.64x102M); and the specific activity of enzyme on substrate concentration (1x10-1%w/v). Keywords: Fermentation; Substrate Concentration; Kinetic parameters; Soursop; Saccharomyces cerevisiae yeast enzyme
      Issue No: Vol. 6
       
  • Comparative Assessment of the Insecticidal Potency of Tobacco Leaves
           Extract (Nicotiana Tabacum), Black Pepper Seeds (Uziza) Extract (Piper
           Guineense) and African Pepper Seeds (Uda) Extract (Xylapia Aetiopica)

    • Authors: Akumefula; M.I, Onwusonye, J., Osuji, C.N, Uzomba, Onyekuru D.A, Akumefula. F.U, Ubaka, K, Eziukwu, C
      Abstract: The biological insecticide was produced with the extract of nicotiana tabacum (tobacco leaves) extract xylopia actiopica (African pepper (uda) seeds extract and piper guineense (Black pepper seeds (uziza)). These extracts were prepared from three different species of plants indigenous to Nigeria and they were tested for their insecticidal activity against sitophilus zeamais and sitophilus oryzea (weevils) under laboratory conditions at 30oc: 24 hour light/dark regimes (methods / systems). The extracts of xylopica aetiopics and piper guineaense had the highest percentage of mortality (88% and 84%) respectively) when compared with the other treatments. Nicotiana tabacum has the least percentage of morality (70%). When the three extracts were combined at the same ratio it was observed that the percentage of morality of the mixture was significantly higher due to the high frequency of the properties of the three different plants extracts. Keywords: Nicotiana tabacum xylopia actipica and piper guineense, insecticide, morality.  
      Issue No: Vol. 6
       
  • Thermodynamic Parameters of the Uncatalyzed Complxation Reaction between
           Ni (II) Ion and Bioactive Isatin-Bishydrazone

    • Authors: Mostafa. K. Rabia, Ahmad Desoky.M Mohamad, Nabawia M. Ismail, Ali Abdo
      Abstract: The stoichiometries and stability constants of Nickel (II) ions with 2-pyridyl-3-Isatin bishydrazone have been determined spectrophotometrically at different temperatures 200C, 250C, 300C, 350C and 400C by using Job’s continuous variation method.  In all cases, the Job’s curves displayed a maximum at a mole fraction Xligand =0.5 indicating the formation of complex with 1:1 metal to ligand ratio. It was observed that metal-ligand stability constant decreases with increasing temperature indicating exothermic nature of the reaction. The thermodynamic parameters i.e., ?G0, ?H0 and ?S0 have also been calculated. Keywords:Isatin-bishydrazone ligands, Ni(II) complexes, thermodynamic parameters, Stability constant, spectrophotometrically.
      Issue No: Vol. 6
       
  • Adsorptive Power Evaluation of the Nano-Crystalline Mo-W Bimetallic Oxides

    • Authors: Heba H. El-Maghrabi, Sara Mikhail, Tamer Zaki
      Abstract: Novel nanosized molybdenum-tungsten bimetallic oxides were prepared by modified Pechini method based on the low temperature polymerization-complexation steps. The physical properties of the prepared nanoparticles were characterized by: X-ray diffraction (XRD), Fourier transformer inferred spectroscopy (FT-IR), differential thermal analyses (DCS), and high resolution transmission electron microscopy (HRTEM). The influence of metal molar ratios (Mo/W) on the morphology and the crystallization the samples was also investigated. The adsorptive power of prepared samples was evaluated through the removal of dimethyl disulfide sulfur compound (in cyclohexane as fuel). The results indicate that all the prepared Mo-W oxide materials are nanoparticles with diameter ranging between 1 and 70 nm. And the smallest nanosize particles enhanced the adsorptive power of the prepared nanostructured Mo-W bimetallic oxide. Keywords : Mixed Oxide, Synthesis, Characterization, Sulfur Adsorption.
      Issue No: Vol. 6
       
  • Synthesis of (5,6,7,8)-Membered Rings of (Sulfur ,Nitrogen) via
           Cyclization of Imine Compounds

    • Authors: Nagham .Mahmood. Aljamali
      Abstract: In this paper , synthesis of a series of compounds from  hetero (Atoms, cycles) like  (5,6,7,8-membered )ring via cyclo addition reaction of anil compound to produce compound [1-13], this reactions involved addition of  carbonyl compounds like (( succinic acid , malonic acid , any compounds have  two terminal  from  amine  and  thiol or  carboxyl group)) to anil compounds  to  produce  various  membered  rings. The structure of the newly synthesized compounds [1-13] were confirmed with (C.H.N)- analysis & substantiated with (FT.IR ,H.NMR) data  & melting points. Keywords : eight membered , sulphur ,macrocycle , Imine ,heterocycle, five membered.
      Issue No: Vol. 6
       
  • Synthesis of Heterocyclic Azo Dyes from Quinolin-8-ol

    • Authors: Benjamin E. Ezema, Chidimma G. Ezema, David I. Ugwu, Jude. I. Ayogu
      Abstract: Six derivatives of heterocyclic azo dyes were synthesized by coupling diazotized aniline and 4-nitroaniline with quinolin-8-ol, 5-nitrosoquinolin-8-ol and 5-nitroquinolin-8-ol respectively. Benzene diazonium salt and 4-nitrobenzene diazonium salt were prepared by treating aniline and 4-nitroaniline respectively with HNO2 generated in situ from NaNO2/HCl at 0-5oC. 5-nitrosoquinolin-8-ol was prepared by treating a solution of quinoline-8-ol in conc. HCl/H2O with solution of sodium nitrite at 0-4o in an ice-salt bath. Oxidation of 5-nitrosoquinolin-8-ol with conc. HNO3 at 17o gave 5-nitroquinolin-8-ol. The dyes were of intense colouration. They were characterized by FT-IR, NMR and elemental analysis. Keywords: Aniline; 4-nitroaniline; quinolin-8-ol; diazotization; nitrosation; oxidation; coupling reaction  
      Issue No: Vol. 6
       
  • Characterizations of Synthesized Nano Hybrid Octyl Gallate with ZnO LHS
           and Determined its Anti Microbial Activities

    • Authors: Abbas Matrood Bashi, Ali AbdulKhadim Alghanimi, Salah Hashim
      Abstract: ZnO nanostructures were synthesized by sol-gel reaction between zinc oxide and (Octyl gallate), Octyl gallate Evolution was characterized by UV-VIS spectroscopy,), Fourier  transform  infrared  (FT-IR) spectroscopy technique, X-ray  diffraction  (XRD), Scanning electron microscopy (SEM) and  Atomic Force Microscope (AFM). A well crystalline fiber-like structure was formed. Controlled release was fitted with different modules. Antimicrobial activity tests were done against eight bacterial and three fungal isolates, results showed that nano hybrid composite was efficient in inhibiting both gram positive and gram negative bacteria as well as the fungal isolates used in this study. Keywords: ZnO; nano materials; antimicrobial activity; intercalations.
      Issue No: Vol. 6
       
  • Synthesis of Mesoporous TiO2 Template-Free and Photocatalytic Activity for
           Azo Dye Degradation

    • Authors: Sawsan A. Mahmoud, Agnes Szegedi, Ahmed K. Aboul Gheit
      Abstract: Nanoporous titanium dioxide was prepared by sol-gel technique. To control the surface area, pore size and pore volume of the prepared TiO2, a catalyzed hydrolysis was carried out using different concentrations of silicotungstic acid (SWA) as a template. A fixed molar ratio of H2O/Ti was used. The prepared TiO2 was calcined at 400 or 600oC. Samples were characterized by nitrogen physic-sorption, X-ray powder diffraction (XRD), selected scattered electron diffraction, Raman spectroscopic analysis, Fourier Transform spectroscopy (FTIR), Thermo gravimetric analysis (TGA), Differential scanning calorimetry (DSC), scanning and transmission electron microscopy (SEM and TEM). The photocatalytic activity of the prepared samples was evaluated by the degradation of alizarin yellow under UV light. The results showed that the crystallinity increases as the concentration of SWA decreases. The presence of SWA during the precipitation of TiO2 prevents the formation of rutile phase and suppresses the crystal growth. The results showed also that the surface area increases as the concentration of SWA decreases. The samples prepared using 0.05M SWA and calcined at 600 oC showed a higher activity. Keywords: mesoporous TiO2, photocatalytic degradation, alizarin yellow, azodye.
      Issue No: Vol. 6
       
  • Cleaning Agent from Natural Rubber Seed Oil (RSO) and Cassava Peels Ash
           Extract

    • Authors: O.F Osagie, G.K Fekarurhobo
      Abstract: The most widely known cleansing agent today is soap. The production of soap using natural rubber seed oil (RSO) and alkali derived from cassava peels ash extract was determined. Prior to the production of soap, physico-chemical analysis of the RSO was determined. The alkali from the cassava peels ash extract was made to react with the RSO to produced the soap. The soap was analysed to determine it chemical composition and efficacy. The values for Foamability, Foam stability, Total fatty matter (TFM), Total free alkali (TFA), Free carbonate alkali, (FCA), Free caustic alkali (Fca) and PH were found to be 321.10ml, 6.13hrs, 60%, 9.6%, 4.7%, 4.9%, and 10.6 respectively. The value from the produced soap analyses has revealed that the soap produced from locally sourced agro based waste has a quality very similar to any standard soap (Lux) which may be due to the crude nature of the soap and the presence of impurities. These impurities can be removed through purification of the ash alkali extract and the RSO. The result obtained from this study has revealed that soap produced using locally sourced materials from agricultural waste have the potential to compete favourably with any standard soap. Keywords: Cassava peels, Cleaning agent, Rubber seed oil, Soap, Saponification
      Issue No: Vol. 6
       
  • Study of Some Physical and Chemical Properties of the Rock Samples
           Selected from Wells N 18 in the Field of Nasiriya and its Oil

    • Authors: Sarah J. Al-Saidy, Mohsin E. Al-Dokheily
      Abstract: This study was based on that hydrocarbon compounds originating in the oil can be leaked from the reservoir of and oil rising to the surface through the different layers. This study followed up relied change concentrations of these compounds and concentrations of elements associated with the change as a way to track it's path rises of such material in a Well 18 (Al- Nasiriya Field) through rock samples taken from various depths along the column of the Well trying to find some kind of comparison between the change 1 Qw2`\`W2\ of focus and depth of the Well.The quantitative and qualitative analyses have been conducted of trace metals in the organic extract from the rock samples using Atomic Absorption Spectroscopy and these elements are sodium, potassium, chromium and nickel. Samples were digested using a mixture of nitric acid concentration of 20% and 20% HCl concentration and by (2:1) volume ratio. The organic content extracted from rock samples contains a compound N- Ethyl Carbazole only, as is clear from the analysis of chromatographic (GC) of the samples. Carbazole rise to the top of the well's column. Some physical and chemical properties of crude oil such as: specific gravity, specific weight API, water content and salt content were measured. Through these properties were found that the oil is considered of medium quality oils and relatively close to the earth's surface and thus it can be extracted with little cost. Keywords: Crude Oil, Trace metals, Ethyl carbazole
      Issue No: Vol. 6
       
  • Sequential Extraction of Lead, Copper, Zinc, Cadmium and Chromium in Soil
           Samples from Dumpsites in Lafia, Nasarawa State Nigeria

    • Authors: Egila; J.N, Ibrahim, E.G, Ibrahim, M.A.G
      Abstract: Sequential extraction of lead, copper, zinc, cadmium and chromium in soil from Jos road and Emir Palace dumpsites were carried out using Tessier et al (1979) method. The values for these metals varied from 0.02-2.68, 0.01-2.58, 0.03-2.31, 0.18-1.40 and 0.03-0.65mgkg-1 for exchangeable, Fe-Mn oxide, organic, carbonate and residual fraction respectively for Jos road dumpsite and 0.13-9.25, 0.34-3.20, 0.31-25.40, 0.85-27.80 and 0.20-4.52 mgkg-1 for exchangeable, Fe-Mn oxide, organic, carbonate and residual fraction respectively for Emir Palace dumpsite. For water analysis the values of conductivity varied from 1215-1320uscm-1, TDS from 825-902ppm, lead 0.03-0.04ppm aluminium 0.63-0.82ppm and magnesium 3.88-5.47ppm were above Standard organization of Nigeria requirement for drinking water. Hence dumpsites pollute soil and water. Keywords:Heavy metal, dumpsite, sequential and extraction.
      Issue No: Vol. 6
       
  • Copper-Catalyzed Arylation Reaction in the Synthesis of New Derivatives of
           Angular Triazaphenoxazinone

    • Authors: Jacob Alifa David, Okoro Uchechukwu Chris
      Abstract: The synthesis of 11-(N-substituted)-angular triazaphenoxazinone via copper catalyzed N-arylation reaction is reported. The key intermediate, 7-chloro-5, 8-quinolinequinone was obtained in a five-step reaction, starting from 8-hydroxyquinoline. This was coupled with 4, 5-diamino-6-hydroxypyrimidine, in the presence of sodium acetate under anhydrous condition to afford 11-amino-1, 8, 10-triazabenzo[a]phenoxazin-5-one. The new derivatives were obtained by the reaction of 11-amino-1, 8, 10-triazabenzo[a]phenoxazin-5-one with substituted potassium/lithium phenyltriolborates, under the catalytic influence of copper (II) acetate in the presence of trimethylamine N-oxide, and 4Å molecular sieve. Products were obtained in good yield (70-80%). Structures were established by spectra and analytical data. These tetracyclic heterocycles absorb light in the visible region (400-700nm), which makes them applicable as laser dyes. Keywords: synthesis, triazaphenoxazinone, copper catalyzed N-arylation reaction
      Issue No: Vol. 6
       
 
 
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