S. El-Basyouni, D. Chen, R. Ibrahim
Jul 1, 1964
Citations
1
Influential Citations
171
Citations
Quality indicators
Journal
Phytochemistry
Abstract
Abstract Radioactive p -hydroxybenzoic, vanillic and syringic acids were shown to be synthesized in a variety of plants from the corresponding hydroxycinnamic acids labelled in the β-position. Decarboxylation of the hydroxybenzoic acids indicated that nearly all the activity was contained in the carboxyl carbons. In addition to the formation of C 6 -C 1 acids by removal of a 2-carbon fragment from C 6 -C 3 acids, some species were capable of O-methylating protocatechuic to vanillic acid or hydroxylating it to yield gallic acid. Demethoxylation of sinapic and dehydroxylation of caffeic acid occurred in some species. Ortho hydroxybenzoic acids were shown to arise from phenylalanine and cinnamic acid.