DERIVATIVES OF PARA-HYDROXYMETHYL-BENZOIC ACID III. AMINO ESTERS1

1925 ◽  
Vol 47 (12) ◽  
pp. 3005-3008 ◽  
Author(s):  
Francis H. Case
Keyword(s):  
2009 ◽  
Vol 81 (16) ◽  
pp. 6633-6640 ◽  
Author(s):  
Karin A. Zemski Berry ◽  
William W. Turner ◽  
Michael S. VanNieuwenhze ◽  
Robert C. Murphy

2012 ◽  
Vol 7 (8) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Tetsuo Kokubun ◽  
Geoffrey C. Kite ◽  
Nigel C. Veitch ◽  
Monique S. J. Simmonds

A total of 16 phenolic compounds, including one new and five known N-cinnamoyl phenylethylamides, one new pyrrole alkaloid named portulacaldehyde, five phenylpropanoid acids and amides, and derivatives of benzaldehyde and benzoic acid, were isolated and identified from a polar fraction of an extract of Portulaca oleracea. Their structures were determined through spectroscopic analyses.


2011 ◽  
Vol 50 (No. 2) ◽  
pp. 54-59 ◽  
Author(s):  
L. Djurdjević ◽  
M. Mitrović ◽  
P. Pavlović ◽  
S. Perišić ◽  
M. Mačukanović-Jocić

 Chrysopogon gryllus and Festuca vallesiaca are components of a number of meadow-pasture communities in Serbia. We performed the analyses of phenolics that influence quality and digestibility of grasses to a great extent. Total phenolics were measured spectrophotometrically and phenolic acids by HPLC analysis. The aboveground parts of C. gryllus contained 10.6 mg/g whereas F. vallesiaca of 21.6 mg/g total phenolics. Bound phenolics dominated over free ones in both species. The content of both free and bound p-coumaric, ferulic, p-hydroxybenzoic and syringic acid was higher in C. gryllus (6.34 mg/g) than in F. vallesiaca (3.96 mg/g). Derivatives of cinnamic acid prevailed in both species compared to the benzoic acid derivatives. Low quality of C. gryllus is connected with its high tissue phenolic acids and mediocre quality of F. vallesiaca with the high content of total phenolics that act unfavourably on digestibility of such grasses.  


1990 ◽  
Vol 28 (3) ◽  
pp. 271-275 ◽  
Author(s):  
Stanisław Wnuk ◽  
Elżbieta Wyrzykiewicz ◽  
Elżbieta Kaczmarek ◽  
Stefan Kinastowski

1983 ◽  
Vol 18 (3) ◽  
pp. 279-282 ◽  
Author(s):  
K. Shailubhai ◽  
S.R. Sahasrabudhe ◽  
K.A. Vora ◽  
V.V. Modi

1978 ◽  
Vol 33 (7-8) ◽  
pp. 465-471
Author(s):  
Franz Daliacker ◽  
Volker Mues ◽  
In-O Kim

Abstract We describe the possibilities of formation and preparation of the “natural” 1,3-benzodioxolecarboxylic acids 1, 2, 4, 6 b, and 7, already mentioned in literature. Myristic acid (3e) was prepared in good yield from 3-methoxy-4,5-dihydroxy-benzoic acid ester (3c) , which could be easily made from 3-methoxy-2,3-carbonyldioxy-benzoic acid methylester (3b). Myristicic acid methylester (3d) could be subjected to methylation and hydrolysis leading to 3e without any difficulties. 4.6-dimethoxy-1,3-benzodioxole-5-carboxylic acid (5b) was prepared in good yields by oxidation of 4,6-dimethoxy-1,3-benzodioxole-5-aldehyde (5a). 5.7-dimethoxy-1,3-benzodioxole-carboxylic acid (13f), one of the “unnatural” 1,3-benzodioxolecarboxylic acids, derivatives of o-ipiperonylic acid (8), was prepared from 5-amino-7-methoxy-1,3- benzodioxole-4carboxylic acid methyl ester (13b) by diazotisation, elimination of nitrogen, methylation, and hydrolysis. A comparison of our measured pkA-values showed the strongest acidity belonging to 5,6-dimethoxy-1,3-benzodioxole-4-carbocylic acid (11).


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