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- Title
Cyclohexanecarboxylic-Acid Derivatives from Psiadia trinervia.
- Authors
Wang, Ying; Hamburger, Matthias; Gueho, Joseph; Hostettmann, Kurt
- Abstract
From a MeOH extra of Psiadia trinervia, seven phenolic compounds were isolated by gel filtration and reversed-phase chromatography. Six of them are known compounds, namely 3,4-di- O-caffeoylquinic acid ( 2), 3,5-di- O-caffeoylquinic acid ( 3), caffeic acid, and three 3-methoxyflavonoids. Compound 1 is a 3,4-di- O-caffeoyl derviative of (1 S,3 R,4 R,5 R)-1,3,4, 5-tetrahydroxycyclohexanecarboxylic acid, a novel steroisomer of (−)-quinic acid. Following hydrolytic treatment of the MeOH extract, ethyl 3- O-caffeoylquinate ( 4), ethyl 3,4-di- O-caffeoylquinate ( 5), and ethyl 3,5- O-caffeoylquinate ( 6) were isolated. The latter three compounds are artifacts. The configuration of 1-3 was established by NMR and CD (exciton chirality method).
- Publication
Helvetica Chimica Acta, 1992, Vol 75, Issue 1, p269
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19920750122