Identification of phenolic compounds and their relationship to the natural resistance of wood from Dipteryx polyphylla Huber and Acacia mangium Willd

Flavonoids are the phenolic compounds that are predominant in the Fabaceae family, and isoflavonoids are especially recognized for their contribution to the natural resistance of wood from species of this family. Herein, we investigated the phenolic compounds from extracts of wood residues from the Fabaceae species Dipteryx polyphylla Huber and Acacia mangium Willd. A phytochemical study of D. polyphylla led to isolation and identification of isoflavans such as 3’,7-dihydroxy-4'-methoxy-isoflavan (1), 2’,8-dihydroxy-4’,7-dimethoxy-isoflavan (2), 2’,7-dihydroxy-4’-methoxyisoflavan (3) and 3’,8-dihydroxy-4’,7-dimethoxy isoflavan (4). Compounds 1 and 4 are new findings. A. mangium gave monocyclic phenolics, such as ferulic acid (6), methylparaben (7) and 4-hydroxybenzaldehyde (8); flavonol melatoxetin (9) as well as fatty acid esters of spinasterol (5). The phenolic compounds that were identified contribute to the knowledge regarding the natural resistance of its woods, thus aggregating value for solid residues and plantation species recommended for reforestatio