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Chem Biodivers ; 19(6): e202200107, 2022 Jun.
Article in English | MEDLINE | ID: mdl-35474603

ABSTRACT

The dichloromethane extract of the cashew nuts from Anacardium occidentale was fractionated by rotation locular countercurrent chromatography aimed at discovering metabolites that could be useful as new models for photosynthesis inhibitors. The chemical fractionation afforded a complex mixture of anacardic acids, which upon catalytic hydrogenation yielded anacardic acid (1). Methylation of 1 via reaction with diazomethane afforded an ester 2. Both compounds were evaluated using polarographic approaches and fluorescence studies of chlorophyll a (ChL a). The in vitro assays informed the decision for the classification of 1 and 2 as Hill reaction inhibitors. Besides that, 1 inhibited the donor side of the PSII, while 2 acted as an energy transfer inhibitor. Therefore, this study is important for the development of herbicides.


Subject(s)
Anacardic Acids , Anacardium , Anacardic Acids/chemistry , Anacardic Acids/pharmacology , Anacardium/chemistry , Chlorophyll A , Nuts/chemistry , Photosynthesis
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