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    Wyświetlanie 1-15 z 15
    Tytuł:
    One pot multi component synthetic approach towards the formation of 1,2,4-triazolo[1,5-a]pyrimidine analogues and their biological evaluation
    Autorzy:
    Khunt, H. R.
    Pipaliya, P. P.
    Ghelani, S. M.
    Babariya, J. S.
    Naliapara, Y. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/411531.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Triazolopyrimidine
    one-pot multicomponent
    Opis:
    A library of functionalised 1,2,3-triazolo[1,5-a]pryrimidine derivatives has been synthesized by one pot multicomponenet reaction. All synthesized novel compounds were characterised by 1H NMR, IR, mass and elemental analysis. Compounds were also screened against bacterial and fungle strain.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 12; 20-25
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, Geometry optimization, Mulliken, MEP, HOMO-LUMO and NLO properties of 2-aryl-3-(2,6-diisopropylphenyl)thiazolidin-4-one based on DFT calculations
    Autorzy:
    Rameshkumar, R.
    Santhi, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178248.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    FT-IR
    HOMO–LUMO
    Thiazolidin-4-one
    hyperpolarizability
    Opis:
    A novel compounds 2-(substitutedphenyl)-3-(2,6-diisopropylphenyl)thiazolidin-4-one (8-12) were synthesized and characterized with the aid of spectral techniques. The molecular geometry of synthesized compound was calculated in the ground state by density functional theory (DFT/B3LYP) using 6-31G(d,p) basis set. The Mulliken and MEP analyses confirm the reactive sites in the designed compounds. The calculated HOMO and LUMO energies were used to analyze the charge transfer within the molecule. The electrical dipole moment (μ) and first hyperpolarizability (βo) values have been computed using DFT/B3LYP method. The higher first order hyperpolarizability of 12 found to be 1.20 x10-30 esu indicating its use as non-linear optical (NLO) material.
    Źródło:
    World Scientific News; 2018, 91; 59-72
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Measure of a New One-Step Numerical Technique via Interpolating Function for the Solution of Initial Value Problem of First Order Differential Equation
    Autorzy:
    Fadugba, Sunday Emmanuel
    Okunlola, Joseph Temitayo
    Powiązania:
    https://bibliotekanauki.pl/articles/1178790.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Initial value problem
    Interpolating function
    One-step numerical technique
    Opis:
    This paper presents the development of a new one-step numerical technique for the solution of initial value problems of first order differential equations by means of the interpolating function. The interpolating function used in this paper consists of both polynomial and exponential functions. Numerical experiments were performed to determine the efficiency and robustness of the scheme. The results show that the scheme is computationally efficient, robust and compares favourably with exact solutions.
    Źródło:
    World Scientific News; 2017, 90; 77-87
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PEG mediated eco-friendly one pot sunthesis of benzylamine coumarin derivatives using multicomponent reactant
    Autorzy:
    Viradiya, D. J.
    Kotadiya, V. C
    Khunt, M. D.
    Baria, B. H.
    Bhoya, U. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/412545.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    one pot reaction
    benzylamine coumarin derivative
    green synthesis
    PEG-400
    Opis:
    A green resourceful, eco-friendly and facile protocol was developed for the synthesis of benzylamine coumarin derivatives by the reaction of 4-hydroxy coumarin, secondary amine and aromatic aldehyde in the presence of PEG400 as a solvent as well as catalyst at room temperature. A wide range of functional groups were tolerated in the developed protocol. The structures of all the synthesized compounds were confirmed by 1H NMR, IR, MASS and Elemental Analysis. The target molecules were obtained in good to excellent yield applying this method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 177-184
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highly efficient and eco-friendly one-pot synthesis of penta substitute pyrrole derivatives under catalyst-free conditions
    Autorzy:
    Viradiya, D. J.
    Baria, B. H.
    Kakadiya, R.
    Kotadiya, V. C.
    Shah, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412605.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    one-pot synthesis
    penta-substituted pyrrole derivatives
    multi-component reactions
    Opis:
    An eco-friendly and efficient one-pot synthesis of penta-substituted pyrrole derivatives via a four-component reaction of maldrum’s acid, arylglyoxal monohydrate, dimethyl but-2-yne-dioate and amines under catalyst-free conditions in an environmentally friendly medium is described. The simple experimental procedure, catalyst-free reaction conditions, short period of conversion, and excellent yields are the advantages of the present method. Good chemical yields have been achieved without the need for chromatography and recrystallization or other purification methods.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 3; 257-264
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A One-step Extended Block Hybrid Formulae for Solving Orbital Problems
    Autorzy:
    Olaoluwa, Omole Ezekiel
    Lukman, Momoh Adelegan
    Powiązania:
    https://bibliotekanauki.pl/articles/1065135.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    A-Stable
    Extended Block Hybrid Formulae
    One-step
    Orbital Problems
    Zero Stability
    Opis:
    A One-step Extended Block Hybrid Formulae (OEBHF) for solving Orbital problems is presented. The processes compute the solutions of Orbital Problems in a block by block fashion by some discrete schemes obtained from the associated continuous schemes and its first derivatives which are combined and implemented as a set of block formulae. The analysis of the method was examined, it was found to be zero stable, consistence, convergent and A-stable. The order, error constants and the region of absolute stability was also investigated, MATLAB package was used to plot the region of stability within which the method is stable. Numerical results revealed this method to be efficient and very accurate, and especially suitable for orbital problems.
    Źródło:
    World Scientific News; 2019, 120, 2; 192-204
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    One-pot three component (LaCl3•7H2O) catalysed biginelli reaction for the synthesis of 1,2,3,4-tetrahydropyrimidine
    Autorzy:
    Murugesan, C.
    Sihabudeen, M. Mohamed
    Ahamed, A. Asrar
    Powiązania:
    https://bibliotekanauki.pl/articles/1190119.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2
    3
    4-tetrahydropyrimidine; one pot synthesis
    Multicomponent reaction; Biginelli reaction; 1
    Opis:
    A Series of tetrahydropyrimidine has been derived by LaCl3•7H2O catalysed one pot three component biginelli reaction. The compounds have synthesised from an aldehyde, ethyl acetoacetate and urea or thiourea in an ethanolic medium using a catalytic amount of (LaCl3•7H2O). This method provides quantitative yield and the catalysis can be easily recovered from the reaction medium and be re-used.
    Źródło:
    World Scientific News; 2016, 35; 87-99
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of copper(II) complex of 3-methyl-2,6-diphenylpiperidin-4-one oxime
    Autorzy:
    Thirunarayanan, G.
    Lakshmanan, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076144.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Complexation
    Copper chloride
    Piperidine-4-one
    Piperidine-4-oneoxime
    UV and IR spectra
    Opis:
    A novel six membered heterocyclic oxime namely 3-methyl-2,6-diphenylpiperidin-4-oneoxime was prepared from the condensation of 3-methyl-2,6-diphenylpiperidin-4-one and hydroxylamine hydrochloride. The obtained oxime was characterized by their physical, analytical and spectroscopic data. This oxime was utilized as ligand for preparation of the copper complex. The oxime belongs to bidentate ligand nature. The copper complex of this oxime was prepared by the conventional heating of ethanolic solution of this oxime and copper chloride pentahydrate. The obtained copper complex was analyzed by their physical constants, analytical, pH measurements, UV and IR spectral data. These physicochemical analysis results confirmed, the structure of the complex was octahedral.
    Źródło:
    World Scientific News; 2019, 116; 102-114
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of novel 2-oxo-4-((4-(3-oxomorpholino)phenyl)amino)-2H-chromene-3-carbonitrile derivatives
    Autorzy:
    Jilariya, Krushnakumar J.
    Chodvadiya, Vijay D.
    Patel, P. K.
    Babariya, Jayesh
    Powiązania:
    https://bibliotekanauki.pl/articles/1075711.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    3-cyano-4chlor coumarin
    4-(4-aminophenyl)morpholin-3-one
    antimicrobial activity
    Opis:
    A highly functionalized heterocyclic library were synthesized, and characterized by common spectroscopic methods. This novel synthetic rout involves nucleophilic substitution reaction of 3-cyano-4chloro coumarin with 4-(4-aminophenyl)morpholin-3-one in the presence of base and methanol as a solvent in good yield and high purity. Key starting material 4-(4-aminophenyl)morpholin-3-one synthesized from aniline. The reaction of aniline with ethylene oxide gives INT-1 which on reaction with Chloroacetyl chloride yield INT-b. Nitration of INT-b gives INT-c, which on reduction with Sn/HCl gives int-D. Further INT-3 was synthesized from 4-hydroxy coumarin. The Vilsmeier-haack reaction of 4-hydroxy coumarin gives INT-01 which on reaction with hydroxylamine hydrochloride and sodium acetate furnished INT-03. All the synthesized compound of libraries characterized using 1H NMR, Mass, and IR spectroscopic technique.
    Źródło:
    World Scientific News; 2019, 119; 231-237
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    About the ways of wearing of one-edged swords in the Przeworsk and the Oksywie culture
    Autorzy:
    Rutkowski, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/1179540.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ancient weapon
    experimental archaeology
    one-edged sword
    the Oksywie culture
    the Przeworsk culture
    Opis:
    Sword is one of the most important identifiers of elite character of the burial in the Przeworsk Culture. The way of wearing double-edged sword is determined by scabbard slide and strap that passes through the slide. The side on which the sword was worn is also incontrovertible. More complicated dilemma can be observed while working on the interpretation of one-edged swords and their suspension system. In some cases there are preserved scabbard clasps and mounts still attached to the blade. This could happen when grave inventory was burnt together with sword hidden in its carrying case. By analysing the placement of the suspension rings with attached strap, we can get answers to such questions as: which side of the body was worn particular sword, what was its inclination towards the body and how high it was suspended. The sole interpretation of research results could give us incomplete view of the past. Running some tests with reconstructed artefacts could significantly influence and change final conclusions regarding analysed archaeological material.
    Źródło:
    World Scientific News; 2017, 76; 173-182
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An efficient solid phase one port synthesis of Novel triazolo[1,5-a]pyrimidine derivatives from 4-(4-aminophenyl)morpholin-3-one and evaluation of their antimicrobial activity
    Autorzy:
    Prajapati, D. R.
    Vilapara, K. V.
    Naliapara, Y. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/412307.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    1,2,4-triazole
    4-(4-aminophenyl)morpholin-3-one
    antibacterial
    antifungal
    biological assai
    Opis:
    A series of novel triazolo[1,5-a]pyrimidine derivatives was synthesized from 5-amino-1,2,4-triazole and biologically active morpholinone amine in excellent yield as promising class of antimicrobial agents. The antimicrobial activities were investigated against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Staphylococcus pyogen, Candida albicans, Aspergillusniger, Aspergillusclavatus and compared with standard drugs Ampicillin, Chloramphenicol, Norfloxacin and Griseofulvin. All the synthesized compounds were characterized by IR, 1H NMR, 13C and mass spectroscopy. The result of antimicrobial activity data revealed that compound 4f,4g and 4i were found more active against bacterial species and compound 4c, 4d, 4g, 4i and 4jwere found more active against fungal strain, while other compounds shows moderate to law activity against microbes.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 14, 1; 12-21
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioactive 3-methyl-2,6-diarylpiperidin-4-one, oxime and its copper(II) complex
    Autorzy:
    Thirunarayanan, G.
    Lakshmanan, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1070862.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antimicrobial activities
    Copper(II) complex
    Disc diffusion
    Drug dilution
    Piperidine-4-one
    Piperidine-4-oneoxime
    Opis:
    namely 3-methyl-2,6-diphenylpiperidin-4-oneoxime and copper(II) complex of this oxime was prepared by literature procedure. The purities of these ketone, oxime and copper complex was analyzed by physico-chemical and spectroscopic methods reported in the literature. The physicochemical analysis results confirmed that the structure of the complex was distorted octahedral. The antimicrobial activities of these substrates such as ketone, oxime and its copper complex were investigated using Bauer-Kirby disc diffusion technique against several antimicrobes by measuring the mm of zones of inhibitions. Further these activities were concluded using drug dilution method. From the analysis report, the copper (II) complex of the oxime shows significant antimicrobial activities against their antimicrobial stains. The oxime shows moderate antimicrobial activity. The ketone shows satisfactory antibacterial and antifungal activities against their stains in both disc diffusion and drug dilution methods.
    Źródło:
    World Scientific News; 2019, 123; 124-140
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of novel 2-oxo-4-((4-(3-oxomorpholino)phenyl)amino)-2H-chromene-3-carbaldehyde derivatives
    Autorzy:
    Jilariya, Krushnakumar J.
    Sanghani, Yogesh J.
    Patel, P. K.
    Babariya, Jayesh
    Powiązania:
    https://bibliotekanauki.pl/articles/1068631.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    4-(4-aminophenyl)morpholin-3-one
    4-chloro-2-oxo-2H-chromene-3-carbaldehyde
    antimicrobial activity
    Opis:
    A highly functionalized heterocyclic library were synthesized, characterized and tested for biological evaluation against bacteria and fungus. This novel synthetic rout involves nucleophilic substitution reaction of 4-chloro-2-oxo-2H-chromene-3-carbaldehyde with 4-(4-aminophenyl) morpholin-3-one in the presence of base and methanol as a solvent in good yield and high purity. All the synthesized compound of libraries characterized using 1H NMR, Mass, and IR spectroscopic technique. Also all compound screened for antimicrobial activity against standard drugs.
    Źródło:
    World Scientific News; 2019, 132; 264-269
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is the light velocity constant?
    Autorzy:
    dos Santos Godoi, Valdir Monteiro
    Powiązania:
    https://bibliotekanauki.pl/articles/1178301.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Earth’s movement
    Michelson
    Special Relativity Theory
    Venus
    average
    light velocity
    one-way
    principle of constancy of light velocity
    radar
    range of light velocities
    Opis:
    The pretension in this paper is to question the constancy of light velocity.
    Źródło:
    World Scientific News; 2017, 86, 3; 365-371
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel synthesis of 3-(((E)-benzylidene)amino)-5-((Z)-3,4-dimethoxybenzylidene)-2-phenyl-3,5-dihydro-4H-imidazol-4-one derivatives as potent antimicrobial agents
    Autorzy:
    Manawar, Rohit B.
    Parmar, Mukesh B.
    Nayaka, Indresh J.
    Pandit, Brinda H.
    Shah, Manish K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1066261.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    4H-imidazol-4-one
    A. niger
    Anti-fungal
    Anti-microbial Agent
    Bioactivity
    C. albicans
    E. coli
    Elemental analysis
    IR spectroscopy
    Mass spectroscopy
    NMR spectroscopy
    P. aeruginosa
    S. aureus
    S. pyogenes
    Opis:
    Novel synthesis of 4H-imidazol-4-one derivative by reaction of (Z)-3-amino-5-(3,4 dimethoxybenzylidene)-2-phenyl-3,5-dihydro-4H-imidazol-4-one with derivative of different aromatic aldehydes and Salicyldehyde. New synthesized compound are thermally stable and neither air-nor moisture sensitive at RT. Successive library of synthesized compound characterized using IR, NMR, Elemental, Mass, and its antimicrobial activity study.
    Źródło:
    World Scientific News; 2019, 130; 42-70
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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