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Prenylated Coumarins, Chalcone and New Cinnamic Acid and Dihydrocinnamic Acid Derivatives from Brosimum gaudichaudii

DOI: 10.1590/S0103-50532002000200023

Keywords: brosimum gaudichaudii, moraceae, coumarins, chalcone, cinnamic acid, dihydrocinnamic acid derivatives.

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three new natural cinnamic acid and dihydrocinnamic acid derivatives were isolated from the roots of brosimum gaudichaudii, in addition to fourteen known substances (ten coumarins, one chalcone, b-sitosterol, 3b-o-b-d-glucopyranosylsitosterol and b-amyrin). the structures were established by spectral data, including analysis of 2d-nmr experiments and mass spectra. all aromatic compounds have 4-hydroxy-3-prenylcinnamic acid as a common precursor. the new substances are derived from a precursor of the coumarins, which through an o-methylation lost its ability to form the lactone ring.


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