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Showing 1 to 12 of 18 entries
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Eco-friendly methodologies for the synthesis of some aromatic esters, well-known cosmetic ingredients.

International journal of cosmetic science

Villa C, Baldassari S, Gambaro R, Mariani E, Loupy A.
PMID: 18492177
Int J Cosmet Sci. 2005 Feb;27(1):11-6. doi: 10.1111/j.1467-2494.2004.00246.x.

Solid-liquid solvent-free phase transfer catalysis (PTC) and acidic catalysis in dry media were applied, with noticeable improvement and simplification over classical procedures in a Green Chemistry context, to the synthesis of some aromatic esters useful as cosmetic ingredients: 3-methylbutyl...

Structure reactivity relationship in the reaction of DNA guanyl radicals with hydroxybenzoates.

Radiation physics and chemistry (Oxford, England : 1993)

Do TT, Tang VJ, Aguilera JA, Milligan JR.
PMID: 21966099
Radiat Phys Chem Oxf Engl 1993. 2010 Nov 01;79(1):1144-1148. doi: 10.1016/j.radphyschem.2010.06.006.

In DNA, guanine bases are the sites from which electrons are most easily removed. As a result of hole migration to this stable location on guanine, guanyl radicals are major intermediates in DNA damage produced by the direct effect...

Formation, structure and conformational dynamics of highly substituted diphenylcarbonates.

Chemistry (Weinheim an der Bergstrasse, Germany)

Godt A, Unsal O, Enkelmann V.
PMID: 11072817
Chemistry. 2000 Oct 02;6(19):3522-30. doi: 10.1002/1521-3765(20001002)6:19<3522::aid-chem3522>3.0.co;2-r.

The symmetrical carbonates 5-8 were prepared from ethyl 4-hydroxybenzoates with aryl-, 4-(arylethynyl)-phenyl-, arylethynyl- or arylbutadiynyl-substituents in the 3- and 5-positions, by reaction with triphosgene. The choice of base (pyridine, DMAP, NaH) had a strong influence on the conversion: For...

Isoaromatization of 4-Alkylidene-3-oxo-1- cyclohexene-1-carboxylates. Convenient Synthesis of Methyl 4-Alkyl-3-hydroxybenzoates.

The Journal of organic chemistry

Campbell E, Martin JJ, Bordner J, Kleinman EF.
PMID: 11667416
J Org Chem. 1996 Jul 12;61(14):4806-4809. doi: 10.1021/jo9522724.

No abstract available.

Synthesis of 3,5-disubstituted 4-hydroxybenzoates by aryl-aryl and alkynyl-aryl coupling.

The Journal of organic chemistry

Godt A, Unsal O, Roos M.
PMID: 10808469
J Org Chem. 2000 May 09;65(9):2837-42. doi: 10.1021/jo991907m.

No abstract available.

pHBMT1, a BAHD-family monolignol acyltransferase, mediates lignin acylation in poplar.

Plant physiology

de Vries L, MacKay HA, Smith RA, Mottiar Y, Karlen SD, Unda F, Muirragui E, Bingman C, Vander Meulen K, Beebe ET, Fox BG, Ralph J, Mansfield SD.
PMID: 34977949
Plant Physiol. 2021 Nov 22; doi: 10.1093/plphys/kiab546. Epub 2021 Nov 22.

Poplar (Populus) lignin is naturally acylated with p-hydroxybenzoate ester moieties. However, the enzyme(s) involved in the biosynthesis of the monolignol-p-hydroxybenzoates have remained largely unknown. Here, we performed an in vitro screen of the Populus trichocarpa BAHD acyltransferase superfamily (116...

Electrochemical Sensing and Assessment of Parabens in Hydro- Alcoholic Solutions and Water Using a Boron-Doped Diamond Electrode.

Sensors (Basel, Switzerland)

Radovan C, Cinghită D, Manea F, Mincea M, Cofan C, Ostafe V.
PMID: 27879939
Sensors (Basel). 2008 Jul 25;8(7):4330-4349. doi: 10.3390/s8074330.

In this paper, the electrochemical behaviour of several parabens preservatives, i.e. esters of p-hydroxybenzoic acid, methyl-, ethyl- and propyl-4-hydroxybenzoates as methyl-, ethyl- and propyl-parabens (MB, EB, and PB), has been investigated at a commercial boron-doped diamond electrode (BDDE), especially...

Structure and Stability of Long Rod-like Dodecyltrimethylammonium Chloride Micelles in Solutions of Hydroxybenzoates: A Molecular Dynamics Simulation Study.

Langmuir : the ACS journal of surfaces and colloids

Gujt J, Bešter-Rogač M, Spohr E.
PMID: 27442259
Langmuir. 2016 Aug 16;32(32):8275-86. doi: 10.1021/acs.langmuir.6b02076. Epub 2016 Aug 02.

The relative position of the hydroxylic and carboxylic groups in the isomeric hydroxybenzoate (HB) anions is experimentally known to have a large impact on the thermodynamics of micellization of cationic surfactants, such as dodecyltrimethylammonium chloride (DTAC), and on the...

Mineralization of phenol and its derivatives by Pseudomonas sp. strain CP4.

World journal of microbiology & biotechnology

Babu KS, Ajithkumar PV, Kunhi AA.
PMID: 24415017
World J Microbiol Biotechnol. 1995 Nov;11(6):661-4. doi: 10.1007/BF00361012.

A Pseudomonas sp. strain, CP4, was isolated that used phenol up to 1.5 g/l as sole source of carbon and energy. Optimal growth on 1.5 g phenol/l was at pH 6.5 to 7.0 and 30°C. Unadapted cells needed 72...

Solution and Solid State Structural Chemistry of Th(IV) and U(IV) 4-Hydroxybenzoates.

Inorganic chemistry

Vanagas NA, Wacker JN, Rom CL, Glass EN, Colliard I, Qiao Y, Bertke JA, Van Keuren E, Schelter EJ, Nyman M, Knope KE.
PMID: 29877086
Inorg Chem. 2018 Jun 18;57(12):7259-7269. doi: 10.1021/acs.inorgchem.8b00919. Epub 2018 Jun 07.

Organic ligands with carboxylate functionalities have been shown to affect the solubility, speciation, and overall chemical behavior of tetravalent metal ions. While many reports have focused on actinide complexation by relatively simple monocarboxylates such as amino acids, in this...

Surface-enhanced Raman scattering of hydroxybenzoic acids adsorbed on silver nanoparticles.

Journal of colloid and interface science

Castro JL, Arenas JF, López-Ramírez MR, Peláez D, Otero JC.
PMID: 19167008
J Colloid Interface Sci. 2009 Apr 01;332(1):130-5. doi: 10.1016/j.jcis.2008.12.029. Epub 2009 Jan 22.

Surface-enhanced Raman scattering (SERS) of hydroxybenzoic acids has been studied on silver sols in H(2)O and D(2)O solutions. The adsorption behavior of 4-hydroxybenzoic acid (4HBA) is different from that of salicylic (2HBA) and 3-hydroxybenzoic (3HBA) acids. It was concluded...

Salicylate isomer-specific effect on the micellization of dodecyltrimethylammonium chloride: large effects from small changes.

Langmuir : the ACS journal of surfaces and colloids

Šarac B, Mériguet G, Ancian B, Bešter-Rogač M.
PMID: 23477611
Langmuir. 2013 Apr 09;29(14):4460-9. doi: 10.1021/la400161n. Epub 2013 Mar 25.

Specific effects of the sodium salts of m- and p-hydroxybenzoates (m-HB and p-HB) on the aggregation process of dodecyltrimethylammonium chloride have been investigated by isothermal titration calorimetry, electrical conductivity, and (1)H NMR and compared with already reported data for...

Showing 1 to 12 of 18 entries