The esters of 4-hydroxybenzoic acid and related compounds. IV. The bacteriostatic action of n-alkyl 4-hydroxybenzoates

1950 ◽  
Vol 69 (4) ◽  
pp. 109-113 ◽  
Author(s):  
W. G. Murrell ◽  
J. M. Vincent
Keyword(s):  
Hydroxybenzoic Acid ◽  
Bacteriostatic Action ◽  
Related Compounds

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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