TY - JOUR
T1 - 13C NMR Spectra of some D:A-friedo-oleananes
AU - Leslie Gunatilaka, A. A.
AU - Dhammika Nanayakkara, N.
AU - Wazeer, Mohammed I.M.
N1 - Funding Information:
Acknowledgements~The ‘-‘C NMR spectra were recorded at the Department of Chemistry. Bristol University, U.K., and we are grateful to Dr. M. Murray for providing the facilities. We thank Drs. P. Sengupta and B. S. Joshi for authentic samples of putranJivadione and Sultrcia triterpene R, respectively,a nd Mrs. S. C. Weerasekera for typing the manuscript. This work was supported in part by the International Foundation for Science (Sweden) and the National Science Council (Sri Lanka).
PY - 1983
Y1 - 1983
N2 - The 13C NMR signals of D:A-friedo-olean-7-one, putranjivadione, D:A-friedo-olean-22-one, D:A-friedo-olean-3,22-dione, and Salacia triterpene R have been assigned using off-resonance decoupling and lanthanide induced shift techniques. 13C NMR data provide further evidence for the boat-boat conformation for the D and E rings of D:A-friedo-oleananes in solution.
AB - The 13C NMR signals of D:A-friedo-olean-7-one, putranjivadione, D:A-friedo-olean-22-one, D:A-friedo-olean-3,22-dione, and Salacia triterpene R have been assigned using off-resonance decoupling and lanthanide induced shift techniques. 13C NMR data provide further evidence for the boat-boat conformation for the D and E rings of D:A-friedo-oleananes in solution.
KW - C NMR analysis
KW - D:A-Friedo-oleananes
KW - D:A-friedo-olean-22-one
KW - D:A-friedo-olean-3,22-dione
KW - D:A-friedo-olean-7-one
KW - Salacia triterpene R
KW - friedelin
KW - putranjivadione
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U2 - 10.1016/0031-9422(83)85038-9
DO - 10.1016/0031-9422(83)85038-9
M3 - Article
AN - SCOPUS:0037757065
SN - 0031-9422
VL - 22
SP - 991
EP - 992
JO - Phytochemistry
JF - Phytochemistry
IS - 4
ER -