Results 191 to 200 of about 4,314 (255)

Titrimetric determination of aminobenzoic acids

Talanta, 1985
A novel titrimetric method for determination of aminobenzoic acids is based on their reaction with excess of bromine to form N-bromo-2,4,6-tribromoaniline, which liberates an equivalent amount of iodine when treated with iodide. The method is applicable to the aminobenzoic acids in the range 0.1-5.0 mg, with a recovery ranging from 96 to 99.7% and a ...
D. Amin, F.M. El-Samman, H. Abdulahed-Malalla   +2 more
openaire   +3 more sources

Oxidative ring-opening of 3-aminoindazoles for the synthesis of 2-aminobenzoates

, 2018
The first oxidative ring-opening of 3-aminoindazoles based on N–N bond cleavage is reported herein. A variety of 2-aminobenzoates were obtained in good yields under mild conditions, in which the free, mono- and dual-brominated aminobenzoates could be ...
Yao Zhou, Q. Song
semanticscholar   +1 more source

Substituent-guided switch between C-H activation and decarboxylative cross-coupling during palladium/copper-catalyzed cascade reactions of 2-aminobenzoates with 2-haloarylaldehydes.

Chemistry, 2013
Substituent-Guided Switch between C H Activation and Decarboxylative Cross-Coupling during Palladium/ Copper-Catalyzed Cascade Reactions of 2-Aminobenzoates with 2-HaloACHTUNGTRENNUNGarylaldehydes Cascade switch : Phenanthridines, pyrazole ...
S. Bhowmik, G. Pandey, S. Batra
semanticscholar   +1 more source

Thermoluminescence of hydroxy and aminobenzoic acids

Journal of Luminescence, 1972
Abstract The thermoluminescence glow spectra of ortho, meta and para-hydroxy and aminobenzoic acids have been investigated as obtained through UV excitation at low temperature. The trap depths are found to range from 0.13-0.39 eV for the various acids, while the trap density turns out to be highest in the ortho-forms.
F. Aramu, M. Serra, G. Spano, V. Maxia
openaire   +2 more sources

Further Sunscreen Studies of Aminobenzoic Acid

Archives of Dermatology, 1972
Further studies with 5% hydroalcoholic solution of aminobenzoic acid showed the following: (1) A total of 60μl/sq cm usually gave complete protection against 30 minimal erythemal doses (MEDs). (2) Daily application greatly enhanced the amount and duration of protection.
Albert M. Kligman, Andrzej Langner
openaire   +3 more sources

Aminobenzoates as building blocks for natural product assembly lines.

Natural product reports (Print), 2012
The ortho-, meta-, and para- regioisomers of aminobenzoate are building blocks for a wide range of microbial natural products. Both the ortho-isomer (anthranilate) and PABA derive from the central shikimate pathway metabolite chorismate while the meta ...
C. Walsh, S. Haynes, B. Ames
semanticscholar   +1 more source

Ribosomal Elongation of Aminobenzoic Acid Derivatives

Journal of the American Chemical Society, 2020
2-Aminobenzoic acid and heterocyclic amino acids are aromatic homologues of β-amino acids, but their chemical properties are quite distinct. Because of the poor nucleophilicity of the amino group conjugated with the aromatic ring, no literature reports of their successful ribosomal elongation in nascent peptide chains have appeared to date.
Takayuki Katoh, Hiroaki Suga
openaire   +3 more sources

Solubility of nonelectrolytes in polar solvents III: Alkyl p-aminobenzoates in polar and mixed solvents.

Journal of Pharmacy and Science, 1975
The relative solubilities of n-alkyl p-aminobenzoates in water, proplyene blycol-water mixtures, proplyene glycol, and several other pharmaceutically important solvents can be predicted on the basis of a theoretical equation.
S. Yalkowsky, G. Amidon, G. Zografi, G. Flynn   +3 more
semanticscholar   +1 more source

THE PHOTOCHEMISTRY OF p‐AMINOBENZOIC ACID

Photochemistry and Photobiology, 1992
Abstract— We have studied the photoreactions occurring when p‐aminobenzoic acid (PABA), a component of some sunscreens, is irradiated in aqueous solution. These studies were carried out in the presence and absence of oxygen, using light of Λ= 254 nm as well as light of wavelengths greater than 290 nm.
Martin D. Shetlar, Anthony A. Shaw, Larry A. Wainschel   +2 more
openaire   +3 more sources

Permeabilities of alkyl p-aminobenzoates through living skin equivalent and cadaver skin.

Journal of Pharmacy and Science, 1993
The in vitro permeabilities of alkyl p-aminobenzoates through living skin equivalent (LSE) and cadaver skin were compared. Methyl, ethyl, and butyl p-aminobenzoates were used as model compounds.
S. Roy, J. Fujiki, J. Fleitman
semanticscholar   +1 more source