TY - JOUR
T1 - Structures of kokzeylanol and kokzeylanonol two new natural tri- and tetra- oxygenated D:A-friedo-oleananes
AU - Gunatilaka, A. A.Leslie
AU - Nanayakkara, N. P.Dhammika
AU - Uvais, M.
AU - Sultanbawa, S.
PY - 1981
Y1 - 1981
N2 - Kokzeylanol and kokzeylanonol obtained from Kokoona zeylanica have been shown to be 6β,27-dihydroxy-D:A-friedo-olean-3-one (1) and 6β,27-dihydroxy-D:A-friedo-oleana-3,21-dione (2), respectively by the deoxygenatlon of their 27-acetoxy derivatives using Lithium-ethylene diamine reduction coupled with spectroscopic and irradiation methods. Kokzeylanonol represents the first tetraoxygenated D:A-friedo-oleanane isolated from a natural source.
AB - Kokzeylanol and kokzeylanonol obtained from Kokoona zeylanica have been shown to be 6β,27-dihydroxy-D:A-friedo-olean-3-one (1) and 6β,27-dihydroxy-D:A-friedo-oleana-3,21-dione (2), respectively by the deoxygenatlon of their 27-acetoxy derivatives using Lithium-ethylene diamine reduction coupled with spectroscopic and irradiation methods. Kokzeylanonol represents the first tetraoxygenated D:A-friedo-oleanane isolated from a natural source.
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U2 - 10.1016/S0040-4039(01)90339-9
DO - 10.1016/S0040-4039(01)90339-9
M3 - Article
AN - SCOPUS:49149132739
VL - 22
SP - 1425
EP - 1428
JO - Tetrahedron Letters
JF - Tetrahedron Letters
SN - 0040-4039
IS - 15
ER -