Spacer-armed copper(ii) complexes with benzenecarboxylic acids and trifluoroacetylacetone aroylhydrazones

2013 ◽  
Vol 42 (48) ◽  
pp. 16878 ◽  
Author(s):  
Victor F. Shul'gin ◽  
Oleg V. Konnik ◽  
Alexey N. Gusev ◽  
Roman Boča ◽  
Lubor Dlháň ◽  
...  
Keyword(s):  
Benzenecarboxylic Acids

scholarly journals Biosynthetic studies on aromatic carotenoids. Biosynthesis of chlorobactene

1973 ◽  
Vol 136 (2) ◽  
pp. 395-404 ◽  
Author(s):  
S. E. Moshier ◽  
D. J. Chapman
Keyword(s):  
Benzene Ring ◽  
Specific Radioactivity ◽  
Oxidative Degradation ◽  
Mevalonic Acid ◽  
Methyl Group ◽  
Biosynthetic Studies ◽  
Benzenecarboxylic Acids

1. The incorporation of [2-14C]mevalonic acid by Chloropseudomonas ethylica strain 2K into chlorobactene was studied. 2. Oxidative degradation of chlorobactene of constant specific radioactivity produced labelled benzenecarboxylic acids and indicated that the benzene ring originates from mevalonic acid. 3. Decarboxylation studies demonstrated a stereospecific methyl migration in the formation of the 1,2,5-trimethylphenyl group of chlorobactene. The migrating methyl group was derived from the C-3′ position of mevalonic acid.

Further Investigations on the Chemistry of Fulvic Acid, a Soil Humic Fraction

1971 ◽  
Vol 49 (13) ◽  
pp. 2302-2309 ◽  
Author(s):  
S. U. Khan ◽  
M. Schnitzer
Keyword(s):  
Fatty Acids ◽  
Hydrogen Bonds ◽  
Fulvic Acid ◽  
Phenolic Acids ◽  
Complex Structures ◽  
Isolation And Identification ◽  
Fractionation Scheme ◽  
Humic Fraction ◽  
Benzenecarboxylic Acids

The fractionation scheme described in this and in an earlier paper resulted in the isolation and identification of about 2.0 g of pure components from 100 g of fulvic acid. About 28% of these compounds were phenolic acids, 19% benzenecarboxylic acids, 13% alkanes and fatty acids, and 40% dialkyl phthalates. The isolation of appreciable amounts of dialkyl phthalates was somewhat surprising but their presence was shown not be an artifact. The KMnO4 oxidation of the same fractions increased the yields of methylated phenolic and benzenecarboxylic acids by between 3 and 11 times.Following KMnO4 oxidation of methylated but unfractioned fulvic acid, the yield of phenolic and benzenecarboxylic acids increased substantially. The increased yields, after oxidation, of the same compounds as those that were separated without oxidation indicate that either these compounds originated from more complex structures or that they came from a structure of the type proposed earlier, which consists of phenolic and benzenecarboxylic acids joined by hydrogen-bonds, on which alkanes, fatty acids, and dialkyl phthalates are adsorbed.

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