scholarly journals Thermal Analysis ot Alkali Salts of Salicylic Acid and p-Hydroxybenzoic Acid

1970 ◽  
Vol 73 (9) ◽  
pp. 1996-2001 ◽  
Author(s):  
Yasutake HARA ◽  
Hideyo OSADA
Keyword(s):  
Thermal Analysis ◽  
Salicylic Acid ◽  
Hydroxybenzoic Acid ◽  
Alkali Salts

Zur Biosynthese der Benzoesäure in Gaultheria procumbens L. II

1964 ◽  
Vol 19 (9) ◽  
pp. 781-783 ◽  
Author(s):  
Hans Grisebach ◽  
Karl-Otto Vollmer
Keyword(s):  
Salicylic Acid ◽  
Cinnamic Acid ◽  
Protocatechuic Acid ◽  
Total Activity ◽  
Syringic Acid ◽  
The Other ◽  
Carboxyl Group ◽  
Hydroxybenzoic Acid ◽  
Benzoic Acids ◽  
Gaultheria Procumbens

Further investigations on the biosynthesis of benzoic acids in Gaultheria procumbens L. have shown that besides salicylic acid all the other benzoic acids (gentisinic acid, p-hydroxybenzoic acid, protocatechuic acid, o-pyrocatechuic acid(?), syringic acid and vanillinic acid) can be formed from cinnamic acid. In the case of vanillinic acid it was proved that the total activity is located in the carboxyl group when cinnamic acid-[3-14C] is the precursor.Formiat-14C is incorporated into the methylester group of methylsalicylate.

Effects of Salicylic Acid on Mushroom Tyrosinase and B16 Melanoma Cells

2007 ◽  
Vol 62 (3-4) ◽  
pp. 227-233 ◽  
Author(s):  
Sadaaki Tamura ◽  
Teruhiko Nitoda ◽  
Isao Kubo
Keyword(s):  
Salicylic Acid ◽  
Reaction Time ◽  
Initial Rate ◽  
Melanoma Cells ◽  
B16 Melanoma ◽  
Enzymatic Oxidation ◽  
Hydroxybenzoic Acid ◽  
Mushroom Tyrosinase ◽  
B16 Melanoma Cells

Abstract Salicylic acid slightly inhibited the oxidation of L-3,4-dihydroxyphenylalanine (L-DOPA) catalyzed by mushroom tyrosinase noncompetitively without being oxidized. In contrast, 4-hydroxybenzoic acid did not inhibit this enzymatic oxidation if a longer reaction time was observed, although it suppressed the initial rate of the oxidation to a certain extent. Neither acid showed noticeable effects on cultured murine B16-F10 melanoma cells except weak cytotoxicity.

The Effect of Some Monohydroxybenzoic and Dihydroxybenzoic Acids as Auxin Synergists on Rooting Softwood Cuttings of Basswood (Tiliaamericana L.) Under Mist

1975 ◽  
Vol 5 (3) ◽  
pp. 500-502 ◽  
Author(s):  
W. A. G. Morsink ◽  
V. G. Smith
Keyword(s):  
Salicylic Acid ◽  
Phenolic Compounds ◽  
Hydroxybenzoic Acid ◽  
Dihydroxybenzoic Acid ◽  
Promoting Effect ◽  
Indolebutyric Acid ◽  
Single Clone ◽  
Juvenile Population

Softwood cuttings of one clone and one juvenile population of basswood were rooted under intermittent mist, using a 2-min basal dip of indolebutyric acid (IBA) at concentrations of 1000, 5000, and 10 000 parts per million (ppm) in combination with one of salicylic acid, p-hydroxybenzoic acid, 3,5-, 2,5-, and 2,6-dihydroxybenzoic acids at concentrations of 5, 50, and 100 ppm. None of the phenolic compounds showed any root-promoting effect when used singly. In combination with IBA, 2,5-dihydroxybenzoic acid showed a root-promoting effect when applied to cuttings of the population but not for cuttings of the single clone.A root-promoting effect at certain of the higher concentrations of the rest of the phenols when combined with IBA could not clearly be distinguished from sample variation. IBA alone or in combination with any of the phenols had a much smaller root-promoting effect when applied to the cuttings of the single clone.

scholarly journals SYNTHESIS OF FLAVANONE-6-CARBOXYLIC ACID DERIVATIVES FROM SALICYLIC ACID DERIVATIVE

2012 ◽  
Vol 12 (1) ◽  
pp. 70-76 ◽  
Author(s):  
Muhammad Idham Darussalam Mardjan ◽  
Retno Ambarwati ◽  
Sabirin Matsjeh ◽  
Tutik Dwi Wahyuningsih ◽  
Winarto Haryadi
Keyword(s):  
Salicylic Acid ◽  
Carboxylic Acid ◽  
Acid Derivative ◽  
Ring Closure ◽  
Hydroxybenzoic Acid ◽  
Fries Rearrangement ◽  
Acetophenone Derivatives ◽  
Ft Ir ◽  
Benzaldehyde Derivatives ◽  
Derivatives Of

Synthesis of flavanone-6-carboxylic acid derivatives had been conducted via the route of chalcone. The synthesis was carried out from salicylic acid derivative, i.e. 4-hydroxybenzoic acid, via esterification, Fries rearrangement, Claisen-Schmidt condensation and 1,4-nucleophilic addition reactions. Structure elucidation of products was performed using FT-IR, 1H-NMR, GC-MS and UV-Vis spectrometers. Reaction of 4-hydroxybenzoic acid with methanol catalyzed with sulfuric acid produced methyl 4-hydroxybenzoate in 87% yield. The acid-catalyzed-acetylation of the product using acetic anhydride gave methyl 4-acetoxybenzoate in 75% yield. Furthermore, solvent-free Fries rearrangement of methyl 4-acetoxybenzoate in the presence of AlCl3 produced 3-acetyl-4-hydroxybenzoic acid as the acetophenone derivatives in 67% yield. Then, Claisen-Schmidt condensation of the acetophenone and benzaldehyde derivatives of p-anisaldehyde and veratraldehyde in basic condition gave 2'-hydroxychalcone-5'-carboxylic acid derivatives  in 81 and 71 % yield, respectively. Finally, the ring closure reaction of the chalcone yielded the corresponding flavanone-6-carboxylic acids in 67 and 59% yield, respectively.

scholarly journals Resource Allocation Among Cladodes of Opuntia Robusta From East-central Mexico

2021 ◽  
Author(s):  
Héctor Javier León-Solano ◽  
Mariusz Krzysztof Janczur ◽  
Emilio González-Camarena ◽  
Marcin Czarnoleski ◽  
Bartosz Jenner ◽  
...  
Keyword(s):  
Resource Allocation ◽  
Salicylic Acid ◽  
Resource Availability ◽  
Stress Factors ◽  
Central Mexico ◽  
Hydroxybenzoic Acid ◽  
East Central ◽  
Vegetative Tissues ◽  
Resource Availability Hypothesis ◽  
New Hypothesis

Abstract The Optimal Defense Hypothesis (ODH) predicts that younger, more valuable plant organs should be better defended. We tested this hypothesis in Opuntia robusta Wendl. since its sequential, hierarchical and segmented architecture permits the consideration of a possible reallocation of secondary metabolites among cladodes with different age. We performed a field study taking samples of vegetative tissues from cladodes of different orders during eight months, and a field experiment, by covering either apical or basal cladodes with a fabric. We determined the content of 4-hydroxybenzoic acid (4-HBA), chlorogenic acid (CGA), quercetin (QUE) and salicylic acid (SA). 4-HBA and CGA followed the predictions of ODH. QUE followed an inverse tendency. SA did not show any tendency related either with the position of the cladode or the treatment (light vs. shade) however, its concentration was positively correlated with the concentration of 4-HBA. As we detected SA only in a low proportion of cladodes and 4-HBA in all cladodes, we hypothesize the conversion of the latter metabolite to the former one. Contrary to ODH, CGA presented lower concentrations in apical than in basal cladodes when co-occurred with SAL, and QUE was transferred from apical (younger) to basal (older) cladodes. In this study, we found contradictions in the premises and outcomes of both the Resource Availability Hypothesis (RAH) and the ODH, suggesting that a new hypothesis concerning the plant defense against stress factors should be proposed.

scholarly journals Crystal structure of 3-bromo-2-hydroxybenzoic acid

2015 ◽  
Vol 71 (5) ◽  
pp. 531-535 ◽  
Author(s):  
Gerhard Laus ◽  
Volker Kahlenberg ◽  
Thomas Gelbrich ◽  
Sven Nerdinger ◽  
Herwig Schottenberger
Keyword(s):  
Crystal Structure ◽  
Salicylic Acid ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Title Compound ◽  
Hydroxybenzoic Acid ◽  
Compound C ◽  
Derivatives Of ◽  
Centrosymmetric Dimers ◽  
Ring Motif

Mutual carboxyl–carboxyl O—H...O hydrogen bonds link the molecules of the title compound, C7H5BrO3, into centrosymmetric dimers which display a centralR22(8) ring motif. In addition, there is an intramolecular hydroxyl–carboxyl O—H...O interaction present. A comparison with the crystal structures of 59 other substituted derivatives of salicylic acid shows that both the centrosymmetric carboxyl–carboxyl O—H...O dimer and the stacking mode of molecules along the shortaaxis observed in the title structure are frequent packing motifs in this set.

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