The esters of 4-hydroxybenzoic acid and related compounds. Part III. Ethers of 4-hydroxybenzoic acid and theirn-alkyl esters

1947 ◽  
Vol 66 (8) ◽  
pp. 274-274 ◽  
Author(s):  
G. W. K. Cavill ◽  
N. A. Gibson
Keyword(s):  
Hydroxybenzoic Acid ◽  
Alkyl Esters ◽  
Related Compounds

p-Hydroxybenzoic Acid Alkyl Esters inAndrographis paniculataHerbs, Commercial Extracts, and Formulated Products

2003 ◽  
Vol 51 (2) ◽  
pp. 524-529 ◽  
Author(s):  
Wenkui Li ◽  
Yongkai Sun ◽  
Joy Joseph ◽  
John F. Fitzloff ◽  
Harry H. S. Fong ◽  
...  
Keyword(s):  
Hydroxybenzoic Acid ◽  
Alkyl Esters

scholarly journals Analysis of alkyl esters of p-hydroxybenzoic acid (parabens) in baby teethers via gas chromatography-quadrupole mass spectrometry (GC-qMS) using a stable isotope dilution assay (SIDA)

2016 ◽  
Vol 8 (17) ◽  
pp. 3466-3474 ◽  
Author(s):  
Theodoros Potouridis ◽  
Elisabeth Berger ◽  
Wilhelm Püttmann
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Stable Isotope ◽  
Hydroxybenzoic Acid ◽  
Methyl Ethyl ◽  
Quadrupole Mass ◽  
Alkyl Esters ◽  
Stable Isotope Dilution ◽  
Isotope Dilution Assay ◽  
Dilution Assay

The present work describes an analytical method for the analysis of methyl-, ethyl- andn-propylparaben in plastic and gel material from baby teethers filled with cooling gel.

Lignin and related compounds. VIII. Lignin monomers and dimers from hydrogenolysis of aspen poplar wood using rhodium-on-charcoal catalyst

1981 ◽  
Vol 59 (7) ◽  
pp. 1028-1031 ◽  
Author(s):  
Kenichi Sudo ◽  
Donald J. Mullord ◽  
James M. Pepper
Keyword(s):  
Silica Gel ◽  
Lignin Degradation ◽  
Degradation Products ◽  
Initial Pressure ◽  
Hydroxybenzoic Acid ◽  
Poplar Wood ◽  
Catalytic Hydrogenolysis ◽  
Lignin Degradation Products ◽  
Related Compounds ◽  
Soluble Lignin

Aspen poplar wood meal has been subjected to catalytic hydrogenolysis in dioxane–water (9:1) at 500 psig initial pressure of hydrogen over a 5% rhodium-on-charcoal catalyst for five hours at 195 + 5 °C. The resulting chloroform-soluble lignin degradation products were separated by cellulose and silica gel column chromatography. The following compounds were isolated and identified: 4-hydroxybenzoic acid (5), 1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (propiosyringone) (6), 2,2′-dihydroxy-3,3′-dimethoxy-5,5′-dipropylbiphenyl (7), 2,3-bis(4-hydroxy-3,5-dimethoxyphenyl)-1-propanol (11), and a mixture of 3-(4-hydroxy-3,5-dimethoxyphenyl)-2-(4-hydroxy-3-methoxyphenyl)-1-propanol (9) and 3-(4-hydroxy-3-methoxyphenyl)-2-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanol (10).

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