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Taraxerol 4-Methoxybenzoate, an in Vitro Inhibitor of Photosynthesis Isolated From Pavonia Multiflora A. St-Hil. (Malvaceae)

Taraxerol 4-Methoxybenzoate, an in Vitro Inhibitor of Photosynthesis Isolated From Pavonia Multiflora A. St-Hil. (Malvaceae)

Leandra Gobira Lopes, Gabriela Lopes Tavares, Luciana Dias Thomaz, José Ricardo Sabino, Keyller Bastos Borges, Paulo Cezar Vieira, Thiago André Moura Veiga, Warley de Souza Borges

Chem Biodivers. 2016 Mar;13(3):284-292.

PMID: 26916413

Abstract:

A phytochemical study of Pavonia multiflora A. St-Hil. (Malvaceae) led to the isolation through chromatographic techniques of 10 secondary metabolites: vanillic acid (1), ferulic acid (2), p-hydroxybenzoic acid (3), p-coumaric acid (4), loliolide (5), vomifoliol (6), 4,5-dihydroblumenol A (7), 3-oxo-α-ionol (9), blumenol C (10), and taraxerol 4-methoxybenzoate (8), the latter being a novel metabolite. Their structures were identified by (1) H- and (13) C-NMR, using one- and two-dimensional techniques, and X-ray crystallography. In this work, we report the effect of compounds 5 and 8 on several photosynthetic activities in an attempt to search for new compounds as potential herbicide agents that affect photosynthesis. Both compounds inhibited the electron flow from H2 O to methyl viologen; therefore, they act as Hill reaction inhibitors. Using polarographic techniques and studies of the fluorescence of chlorophyll a, the interaction sites of these compounds were located at photosystem II.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP38444132	4-Pentylphenyl 4-methoxybenzoate		38444-13-2	Price

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