Results 171 to 180 of about 13,809 (213)

Trialkylsilyl- and 1-silatranylmethyl esters of 4-aminobenzoic acid

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1984
Some previously unknown trialkylsilylmethyl and 1-silatranylmethyl esters of 4-aminobenzoic acid were synthesized.
M. G. Voronkov, B. Shirchin, N. I. Golovanova, A. I. Albanov   +3 more
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The structural properties of a noncentrosymmetric polymorph of 4-aminobenzoic acid

Acta Crystallographica Section C Structural Chemistry, 2014
The crystal structure of a polymorph of 4-aminobenzoic acid (PABA), C7H7NO2, at 100 K is noncentrosymmetric, as opposed to centrosymmetric in the structures of the other known polymorphs. The two crystallographically independent PABA molecules form pseudocentrosymmetric O—H...O hydrogen-bonded dimers that are further linked by N—H...O hydrogen bonds ...
Rim, Benali-Cherif, Radhwane, Takouachet, El Eulmi, Bendeif, Nourredine, Benali-Cherif   +3 more
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Isoniazid and 4-aminobenzoic acid in the treatment of murine tuberculosis

Experientia, 1961
Bei der Mausetuberkulose war die kombinierte Therapie von Isoniazid mit 4-Aminobenzoesaure (PABA) (3 mg/Tag/Tier) wirksamer als diejenige von Isoniazid allein. Bei niedrigerer PABA-Dosis wurde der Synergismus nicht nachgewiesen.
R, URBANCIK, Z, SIMANE, P, KRAUS, I, REIL   +3 more
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Growth and characterization of an adduct 4-aminobenzoic acid with nicotinic acid

Journal of Crystal Growth, 2011
Abstract Synthesis, crystal growth of an adduct 2:1 4-aminobenzoic acid–nicotinic acid (AMN) and characterization are reported. The crystallographic data of the title compound are obtained from single crystal X-ray diffraction technique. The optical absorbance spectrum from 200 to 2250 nm shows the cutoff occurs at 490 nm.
S. Anandhi, M. Rajalakshmi, T.S. Shyju, R. Gopalakrishnan   +3 more
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Electrochemical synthesis of 4-aminobenzoic acid from 4-nitrobenzoic acid: fundamental aspects

Journal of Applied Electrochemistry, 1986
On the basis of the electrolytic reduction of 4-nitrobenzoic acid to 4-aminobenzoic acid, the present paper deals with electrochemical engineering in a multi-phase medium. From experimental data a reactor adapted to the electrolytic reduction in a solid-liquid dispersion was designed.
F. Lapicque, A. Storck
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The chlorination of 4‐aminobenzoic acid and its methyl ester

Recueil des Travaux Chimiques des Pays-Bas, 1959
AbstractChlorination of 4‐acetylaminobenzoic acid (III) afforded 4‐acetylamino‐3,5‐dichlorobenzoic acid (IV, m.p. 237‐238°), which could be saponified easily to 4‐amino‐3,5‐dichlorobenzoic acid (II, m.p. 290°). Direct chlorination of 4‐aminobenzoic acid (I) in a mixture of glacial acetic acid and hydrochloric acid afforded 3,4,4,6,6‐pentachloro‐1 ...
C. van der Stelt, W. Th. Nauta
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Copper(II) complexes of 4-aminobenzoic and 4-aminosalicylic acids

Inorganica Chimica Acta, 1985
Abstract Copper(II) complexes of 4-aminobenzoic (HAB) and 4-aminosalicylic (HAS) acids were prepared and characterized by means of thermal analysis, magnetic measurements, ESR, IR and electronic spectroscopy. Both ligands behave as monodentate (carboxylate bonded) or bridging bidentate (amino and carboxylate bonded) donors yielding two types of ...
MICERA, Giovanni, NALDINI, Luciana, Erre, L. Strinna, ZORODDU, Maria Antonietta, Cariati, F.   +4 more
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Molecular structure of 4-aminobenzoic acid salts with alkali metals

Journal of Molecular Structure, 2006
Abstract The influence of lithium, sodium, potassium, rubidium and cesium on the electronic system of the 4-aminobenzoic acid was studied. The vibrational (FT-IR, FT-Raman) and NMR ( 1 H and 13 C) spectra for 4-aminobenzoic acid and its alkali metal salts were recorded. The assignment of vibrational spectra was done.
R. Świsłocka, M. Samsonowicz, E. Regulska, W. Lewandowski   +3 more
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Determination of nicotinamide and 4-aminobenzoic acid in pharmaceutical preparation by LC

Journal of Pharmaceutical and Biomedical Analysis, 2002
A rapid, precise and time saving high performance liquid chromatographic method has been developed and validated for the simultaneous determination of nicotinamide and 4-aminobenzoic acid in pharmaceutical preparation. The method involves isocratic elution of mobile phase through column in a reverse phase chromatography with UV detection at 254 nm. The
Abdul Rafiq, Khan, Khalid Mohammad, Khan, Shahnaz, Perveen, Naeem, Butt   +3 more
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Hydrogen-bonding interactions in the 4-aminobenzoic acid salt of atenolol monohydrate

Acta Crystallographica Section C Crystal Structure Communications, 2007
Atenolol {or 4-[2-hydroxy-3-(isopropylamino)propoxy]phenylacetamide} crystallizes with 4-aminobenzoic acid to give the salt {3-[4-(aminocarbonylmethyl)phenoxy]-2-hydroxypropyl}isopropylammonium 4-aminobenzoate monohydrate, C14H23N2O3(+) x C7H6NO2(-) x H2O.
Benyong, Lou, Dan, Boström, Sitaram P, Velaga   +2 more
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