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Two new routes for the synthesis of enantiomerically pure ochratoxin alpha ((3R)-OTα) are presented, which is the key intermediate for the synthesis of ochratoxin A (OTA) by coupling reaction with the amino acid l-phenylalanine. The key step of both routes is the one pot directed ortho-metalation/alkylation/lactonization of unprotected and suitably functionalized aromatic carboxylic acids, using lithium...
A simple methodology for the determination of the fatty acid composition of edible oils through 1H NMR is proposed. The method is based on the fact that all fatty acid chains are esterified to a common moiety, glycerol, and the quantification is done directly in the 1H NMR spectra through the relationship between the areas of a characteristic signal of each fatty acid and a signal of the glycerol...
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