Studies on terpenoids and steroids. Part 10. Structures of four new natural phenol is D:A-friedo-24-noroleanane triterpenoids
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 12,p. 2849-2854
- https://doi.org/10.1039/p19870002849
Abstract
The three new phenolic nortriterpenes, demethylzeylasteral, zeylasteral, and demethylzeylasterone, isolated from Kokoona zeylanica(Celastraceae), have been shown to be 2,3-dihydroxy-6,23-dioxo-D:A-friedo-24-noroleana-1,3,5(10),7-tetraen-29-oic acid (5), its methyl ester (6), and 2,3-dihydroxy-6-oxo-D:A-friedo-24-noroleana-1,3,5(10),7-tetraene-23,29-dioic acid (7), respectively. The structure of the new phenolic (9 → 8)-D:A-friedo-24-noroleanane triterpene obtained from ‘kokum soap’ has been established as 23-oxoisopristimerin III (11) on the basis of spectroscopic evidence. The biosynthetic significance of 23-oxoisopristimerin III is discussed.This publication has 1 reference indexed in Scilit:
- Salaspermic acid, a new triterpene acid from Salacia macrosperma WightJournal of the Chemical Society, Perkin Transactions 1, 1979