The trimeric caffeic acid derivative pulcaffeate (1) was isolated from the organic crude extract of the roots of Bourreria pulchra (Boraginaceae). The biosynthesis of 1 appears to involve an intramolecular Diels-Alder reaction between a cyclohexa-1,3-diene intermediate, generated by the oxidation of the aromatic ring of a cinnamic acid unit, and the conjugated double bond of a caffeic acid unit. The structure of the new metabolite was elucidated through a detailed analysis of its1H and13C NMR spectroscopic data. This is the first report of a trimeric metabolite occurring in B. pulchra.
CITATION STYLE
Erosa-Rejón, G. J., Yam-Puc, A., Peña-Rodríguez, L. M., & Sterner, O. (2023). Pulcaffeate, a Trimeric Caffeic Acid Derivative from Bourreria pulchra. Journal of the Mexican Chemical Society, 67(3), 182–186. https://doi.org/10.29356/jmcs.v67i3.1985
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