Articles with "nitration" as a keyword



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Ipso-Nitration of 2-Halothiophenes with Silver Nitrate

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Published in 2017 at "Asian Journal of Organic Chemistry"

DOI: 10.1002/ajoc.201700392

Abstract: It is described a simple method for the ipso-nitration of aryl substituted 2-halothiophenes, which produce 2-nitrothiophenes with regioselectivity is described. The method involves AgNO3 as the nitration reagent without further additives to conduct the transformation. read more here.

Keywords: nitration; chemistry; nitration halothiophenes; silver nitrate ... See more keywords
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Mechanism and regioselectivity of electrophilic aromatic nitration in solution: the validity of the transition state approach

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Published in 2017 at "Journal of Molecular Modeling"

DOI: 10.1007/s00894-017-3561-z

Abstract: The potential energy surfaces in gas phase and in aqueous solution for the nitration of benzene, chlorobenzene, and phenol have been elucidated with density functional theory at the M06-2X/6-311G(d,p) level combined with the polarizable continuum… read more here.

Keywords: nitration; rate determining; transition; solution ... See more keywords
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Sodium perborate/NaNO2/KHSO4-triggered synthesis and kinetics of nitration of aromatic compounds

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Published in 2018 at "Research on Chemical Intermediates"

DOI: 10.1007/s11164-018-3473-2

Abstract: Sodium perborate (SPB) was used as efficient green catalyst for NaNO2/KHSO4-mediated nitration of aromatic compounds in aqueous acetonitrile medium. Synthesis of nitroaromatic compounds was achieved under both conventional and solvent-free microwave conditions. Reaction times were… read more here.

Keywords: sodium perborate; nano2 khso4; nitration; aromatic compounds ... See more keywords
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Selective O- and N-nitration of steroids fused to the pyrazole ring

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Published in 2018 at "Russian Chemical Bulletin"

DOI: 10.1007/s11172-018-2308-z

Abstract: Chemoselective methods for O- and N-nitration of steroids fused to the pyrazole ring were developed. The nitrating agents were acetyl, propionyl, and trifluoroacetyl nitrates generated from carboxylic acid anhydrides and either copper nitrate or nitric… read more here.

Keywords: nitration; steroids fused; fused pyrazole; selective nitration ... See more keywords
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Yttrium Nitrate mediated Nitration of Phenols at room temperature in Glacial Acetic acid

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Published in 2017 at "Journal of Chemical Sciences"

DOI: 10.1007/s12039-016-1202-1

Abstract: AbstractRapid nitration of electron rich phenols using Y(NO 3) 3.6H 2O in glacial acetic acid at room temperature was observed with good yield. The method allows nitration of phenols without oxidation, and isolation of nitration… read more here.

Keywords: acetic acid; glacial acetic; nitration; room temperature ... See more keywords
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Cardiolipin interactions with cytochrome c increase tyrosine nitration yields and site-specificity.

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Published in 2021 at "Archives of biochemistry and biophysics"

DOI: 10.1016/j.abb.2021.108824

Abstract: The interaction between cytochrome c and cardiolipin is a relevant process in the mitochondrial redox homeostasis, playing roles in the mechanism of electron transfer to cytochrome c oxidase and also modulating cytochrome c conformation, reactivity… read more here.

Keywords: nitration; nitration yields; yields site; cardiolipin ... See more keywords
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Hydrophobic WO3/SiO2 catalyst for the nitration of aromatics in liquid phase

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Published in 2019 at "Applied Catalysis A: General"

DOI: 10.1016/j.apcata.2019.02.002

Abstract: Abstract WO3/SiO2 solid acid catalyst synthesized using sol gel method has shown promising activity (up to 65% conversion) for aromatic nitration in liquid phase using commercial nitric acid (70%) as nitrating agent without using any… read more here.

Keywords: catalyst; nitration; liquid phase; wo3 sio2 ... See more keywords
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Full nitration-denitration versus partial nitration-denitration-anammox for treating high-strength ammonium-rich organic wastewater.

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Published in 2018 at "Bioresource technology"

DOI: 10.1016/j.biortech.2018.04.049

Abstract: This study investigated the performance of full nitration-denitration (FND) and partial nitration-denitration-anammox (PNDA) in treating a synthetic wastewater with 300 mg/L NH4+-N and 600 mg/L COD. It was found that approximately 40% higher total nitrogen removal was… read more here.

Keywords: nitration; wastewater; process; partial nitration ... See more keywords
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Determination of nitration kinetics of p-Nitrotoluene with a homogeneously continuous microflow

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Published in 2022 at "Chemical Engineering Science"

DOI: 10.1016/j.ces.2021.117041

Abstract: Abstract The kinetics of p-nitrotoluene nitration with mixed acid is important to industrial process design and safety control. However, it’s difficult to acquire accurate kinetic data and no kinetics study has ever been reported before… read more here.

Keywords: nitrotoluene homogeneously; nitration; homogeneously continuous; kinetics nitrotoluene ... See more keywords
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Degradation of hydroxyoxime extractants by nitration and remedies with inhibitor reagent

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Published in 2019 at "Hydrometallurgy"

DOI: 10.1016/j.hydromet.2018.12.001

Abstract: Abstract In this study, degradation of hydroxyoxime extractants by nitration was studied in nitrate media. The effect of nitrate concentration in the range of 10–40 g/L, pH value range of 1.5–2.3, temperature in the range of… read more here.

Keywords: hydroxyoxime extractants; extractants nitration; nitration; inhibitor reagent ... See more keywords
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Selective extraction of rare earths and lithium from rare earth fluoride molten-salt electrolytic slag by nitration

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Published in 2021 at "Hydrometallurgy"

DOI: 10.1016/j.hydromet.2021.105552

Abstract: Abstract The extraction of rare earth elements (REEs) from rare earth fluoride molten-salt electrolytic slag has recently attracted attention because of the potential environmental hazards of this material and its rich content of valuable REEs.… read more here.

Keywords: fluoride molten; electrolytic slag; nitration; extraction ... See more keywords