Results 31 to 40 of about 13,809 (213)

Synthesis of Quinazolin-4(3H)-ones via a novel approach

open access: yesJournal of Saudi Chemical Society, 2023
The present work was designed based on the new multi-component reaction, which forms 2-aryl/alkyl-quinazolin-4(3H)-ones in a one-pot reaction with good to excellent yields (86–97 %) using 2-aminobenzoic acid, organic acid, and ammonium ...
Ali Akbari, Mahboobeh Zahedifar
doaj   +1 more source

Synthesis and the biological activity of bis-mefenamidocalixarene

open access: yesЖурнал органічної та фармацевтичної хімії, 2019
Aim. To develop the method for the synthesis of the conjugate of diaminocalix[4]arene with 2-(2,3-dimethylphenyl)aminobenzoic acid (mefenamic acid) – bis-mefenamidocalixarene, determine its structure and physicochemical properties and assess its anti ...
Nataliya M. Chalenko   +2 more
doaj   +1 more source

Uncertainty evaluation for determination of anesthetics residues and their metabolites in aquatic products by high-performance liquid chromatography-tandem mass spectrometry

open access: yesShanghai yufang yixue, 2022
ObjectiveThe study aimed to evaluate the measurement uncertainty in the determination of five cacaine anesthetics and their metabolites residues by high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS).MethodsThrough the ...
ZHANG Luwen   +4 more
doaj   +1 more source

4-nitrobenzoate inhibits 4-hydroxybenzoate polyprenyltransferase in malaria parasites and enhances atovaquone efficacy. [PDF]

open access: yesFEBS Lett
Atovaquone is an antimalarial requiring potentiation for sufficient efficacy. We pursued strategies to enhance its activity, showing that 4‐nitrobenzoate inhibits 4‐hydroxybenzoate polyprenyltransferase, decreasing ubiquinone biosynthesis. Since atovaquone competes with ubiquinol in mitochondria, 4‐nitrobenzoate facilitates its action, potentiating ...
Verdaguer IB   +7 more
europepmc   +2 more sources

Synthesis of New Heterocyclic Derivatives from 4-(3, 5-Dimethyl-1-phenyl-1H-pyrazol-4-ylazo)- benzoic acid

open access: yesمجلة بغداد للعلوم, 2010
In this work pyrazolin derivatives were prepared from the diazonium chloride salt of 4-aminobenzoic acid. Azo compounds were prepared from the reaction of an ethanolic solution of sodium acetate and calculated amount of active methylene compound namely,
Baghdad Science Journal
doaj   +1 more source

Crystal Structure of Pyridinyl-2-methylene-4-aminobenzoic acid

open access: yesX-ray Structure Analysis Online, 2011
The crystal structure of pyridinyl-2-methylene-4-aminobenzoic acid, C13H10N2O2, shows the expected stereochemistry trans around the C=N double bond. On the other hand, hydrogen bonds play an important role concerning geometrical aspects of molecules in the solid state.
Kamal ALIZADEH, Ali MORSALI
openaire   +2 more sources

Crystal structures of two erbium(III) complexes with 4-aminobenzoic acid and 4-chloro-3-nitrobenzoic acid

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
The crystal structures of two erbium(III) complexes with 4-aminobenzoic acid (4-ABAH), namely bis(μ2-4-aminobenzoato-κ2O:O′)bis[bis(4-aminobenzoato-κ2O,O′)diaquaerbium(III)] dihydrate, [Er2(C7H6NO2)6(H2O)4]·2H2O, (I), and 4-chloro-3-nitrobenzoic acid ...
Graham Smith, Daniel E. Lynch
doaj   +1 more source

4,4′-Bipyridinium bis(perchlorate)–4-aminobenzoic acid–4,4′-bipyridine–water (1/4/2/2)

open access: yesActa Crystallographica Section E, 2009
In the structure of the title compound, C10H10N22+·2ClO4−·4C7H7NO2·2C10H8N2·2H2O, the 4,4′-bipyridinium cation has a crystallographically imposed centre of symmetry.
Qun-Hui Meng   +4 more
doaj   +1 more source

Adsorption of an Amphoteric Aromatic Compound (-Aminobenzoic Acid) onto Different Polymeric Adsorbents

open access: yesAdsorption Science & Technology, 2006
The adsorptive properties of p -aminobenzoic acid onto macroporous, hypercrosslinked and multi-functional polymeric adsorbents were investigated systematically in the present study in relation to the particular physicochemical characteristics of an ...
Hai-Ling Wang   +2 more
doaj   +1 more source

3-Aminobenzoic acid–1,2-bis(4-pyridyl)ethane (1/1)

open access: yesActa Crystallographica Section E, 2010
The asymmetric unit of the title compound, C12H12N2·C7H7NO2, contains two 3-aminobenzoic acid molecules and two 1,2-bis(4-pyridyl)ethane molecules.
Fwu Ming Shen, Shie Fu Lush
doaj   +1 more source

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