A SIMPLE METHOD FOR THE SYNTHESIS OF PYRAZOLO[1,5- d ][1,2,4]TRIAZINES via THE REACTION OF TETRACARBONYL COMPOUNDS WITH THIOCARBONOHYDRAZIDE
Sign Up to like & getrecommendations! Published in 2019 at "Chemistry of Heterocyclic Compounds"
DOI: 10.1007/5191
Abstract: 1,3,4,6-Tetracarbonyl compounds undergo a series of cascade condensations with thiocarbonohydrazide to form substituted pyrazolo[1,5- d ][1,2,4]triazines. The studied transformations proceed in good yields under catalyst-free conditions, and the reaction products are isolated without the use… read more here.
Keywords: tetracarbonyl compounds; pyrazolo triazines; reaction; simple method ... See more keywords
Acid-catalyzed reaction of phenols with N-(4,4-diethoxybutyl)sulfonamides – a new method for the synthesis of 2-aryl-1-sulfonylpyrrolidines
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DOI: 10.1007/s10593-017-2034-8
Abstract: We have developed a new method for the synthesis of 2-aryl-1-sulfonylpyrrolidines on the basis of reactions between various phenols and N-(4,4-diethoxybutyl)sulfonamides in the presence of trifluoroacetic acid. The structures of the obtained products were confirmed… read more here.
Keywords: phenols diethoxybutyl; new method; aryl sulfonylpyrrolidines; spectroscopy ... See more keywords
A New Method for the Synthesis of Substituted 8,9,10,11-Tetrahydroindolo[1,2-a]Quinoxalin-6(5H)-Ones
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DOI: 10.1007/s10593-017-2090-0
Abstract: The reaction of 1-(cyclohexen-1-yl)pyrrolidines with 3-(α-chlorobenzyl)quinoxalin-2(1H)-ones resulted in the formation of 8,9,10,11-tetrahydroindolo[1,2-a]quinoxalin-6(5H)-ones via a tandem sequence of Stork enamine alkylation and intramolecular annulation. Oxidative dehydrogenation gave indolo[1,2-a]quinoxalin-6(5H)-one. read more here.
Keywords: new method; synthesis substituted; quinoxalin ones; tetrahydroindolo quinoxalin ... See more keywords
Efficient method for the synthesis of 1,3-unsubstituted 2-imino-5-oxooctahydroimidazo[4,5-d]imidazolium iodides based on thioglycolurils
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DOI: 10.1007/s10593-019-02433-5
Abstract: A facile and efficient two-step synthetic route to previously inaccessible 1,3-unsubstituted 2-imino-5-oxooctahydroimidazo[4,5-d]-imidazol-1-ium iodides has been developed using easily accessible thioglycolurils, MeI, and various primary amines, morpholine, or ethylene diamine. The structure of representative products and… read more here.
Keywords: unsubstituted imino; efficient method; imino oxooctahydroimidazo; method synthesis ... See more keywords
The role of machine learning method in the synthesis and biological ınvestigation of heterocyclic compounds.
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DOI: 10.1007/s11030-021-10264-w
Abstract: Machine learning (ML) methods have attracted increasing interest in chemistry as in all fields of science in recent years. This method is of great importance for the design of targeted bioactive compounds, especially by avoiding… read more here.
Keywords: machine; machine learning; heterocyclic compounds; role machine ... See more keywords
A rapid method for the synthesis of perovskite (ATiO3, A=Ca, Sr, Ba) in molten chloride
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DOI: 10.1016/j.ceramint.2019.06.113
Abstract: Abstract This paper reports the rapid synthesis of perovskite (ATiO 3 , A = Ca, Sr, Ba) via molten salt method within 10 min BaCl 2 or CaCl 2 was used due to their excellent solubility of O… read more here.
Keywords: rapid method; synthesis perovskite; method synthesis; synthesis ... See more keywords
A new method of synthesis well-dispersion and dense Fe3O4@SiO2 magnetic nanoparticles for DNA extraction
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DOI: 10.1016/j.cplett.2018.11.001
Abstract: Abstract A new method was developed for preparing monodisperse Fe3O4@SiO2 magnetic core-shell nanoparticles via three steps. The obtained nanoparticles exhibit high saturation magnetization, good surface topography and dispersion as characterized by FTIR, SEM and VSM.… read more here.
Keywords: dispersion; new method; method synthesis; fe3o4 sio2 ... See more keywords
Facile method for the synthesis of zinc- or magnesium-doped gallium nitride powders from gallium metal
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DOI: 10.1016/j.jcrysgro.2021.126190
Abstract: Abstract We describe a facile method for synthesizing high-purity Zn-doped and Mg-doped GaN powders from Ga metal in supercritical ammonia at a moderate reaction temperature using ZnX2 and MgX2 (X = F, Cl, Br, or I) as… read more here.
Keywords: method synthesis; zinc magnesium; facile method; metal ... See more keywords
A new method for synthesis of a HMFI/SiC composite
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DOI: 10.1016/j.matlet.2021.129497
Abstract: Abstract HMFI/SiC composites show considerable potential for applications in heterogeneous catalysis due to the combination of the high catalytic performance of HMFI zeolites and the high thermal conductivity, mechanical strength, high-temperature resistance, and good chemical… read more here.
Keywords: synthesis hmfi; new method; method synthesis; hmfi sic ... See more keywords
An efficient method for the synthesis of functionalized 4H-chromenes as optical sensor for detection of Fe3+ in ethanol
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DOI: 10.1016/j.poly.2019.03.042
Abstract: Abstract An efficient method for the synthesis of functionalized 4H-chromenes via a one-pot three-component condensation reaction of a 2-hydroxybenzaldehyde with an active methylene compound and a carbon-based nucleophile in the presence of SrFe12O19 as catalyst… read more here.
Keywords: method synthesis; fe3; efficient method; synthesis functionalized ... See more keywords
A method for synthesis of oriented epitope-imprinted open-mouthed polymer nanocapsules and their use for fluorescent sensing of target protein.
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DOI: 10.1016/j.talanta.2021.122690
Abstract: Epitope imprinting has proved to be an effective way for fabricating artificial receptors for protein recognition. Surface imprinting over sacrificial supports is particularly favorable for generating high-quality epitope-imprinted cavities, but obtaining nanomaterials by this way… read more here.
Keywords: epitope imprinted; imprinted open; synthesis oriented; epitope ... See more keywords