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Evaluation of Antioxidant and Anthelmintic Properties of Tithonia diversifolia Extracts Against Gastrointestinal Nematode Eggs Using In Vitro Assays
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Comparison of antioxidant activities of tocol and its methyl derivatives

H S Olcott1, J Van der Veen

  • 1Institute of Marine Resources, Department of Nutritional Sciences, University of California, 94720, Berkeley, California.

Lipids
|July 1, 1968
PubMed

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ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH301:11

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All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...