TY - JOUR
T1 - Studies on terpenoids and steroids. Part 10.1 structures of four new natural phenolic D
T2 - A-friedo-24-noroleanane triterpenoids2
AU - Gamlath, Chandra B.
AU - Gunaherath, Kamal B.
AU - Leslie Gunatilaka, A. A.
PY - 1987
Y1 - 1987
N2 - 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.
AB - 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.
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U2 - 10.1039/P19870002849
DO - 10.1039/P19870002849
M3 - Article
SN - 1470-4358
SP - 2849
EP - 2854
JO - Journal of the Chemical Society, Perkin Transactions 1
JF - Journal of the Chemical Society, Perkin Transactions 1
ER -