TY - JOUR
T1 - Irradiation of friedelan-21-ones
T2 - Structure determination of novel friedelane triterpenes from kokoona zeylanica
AU - Gunatilaka, A. A.Leslie
AU - Nanayakkara, N. P.Dhammika
AU - Sultanbawa, M. Uvais S.
N1 - Funding Information:
Structural assignments are based on i.r. and 'H n.m.r. spectroscopic evidence. 2 Direct comparison with an authentic sample. 9 Comparison ofphysical data (m.p., [a]~,and mass spectrum). J.C.S. CHEM.COMM.,1979 Financial support from the U.S.D.A. and The Chemical mass spectra and Professor S. Balasubramaniam for the Society, London, and a studentship (to N. P. D. N.) from identification of plant material. Lever Brothers (Ceylon) Ltd., is gratefully acknowledged. We thank Professor R. H. Thomson for high resolution (Received, 24tJz November 1978; Corn. 1265.) 1 B. J. Clarke, J. L. Courtney, and W. Stem, Austral. J. Chem., 1970, 23, 1651. N. P. D. Nanayakkara, A. A. L. Gunatilaka, and M. U. S. Sultanbawa, Proc. Sri Lanka Assoc. Advancement Sci., 1977, 33,66. 3 S. P. Gunasekera and M. U. S. Sultanbawa, J.C.S. Perkin I, 1977, 483. T. R. Govindachari, N. Viswanathan, B. R. Pai, U. R. Rao, and M. Sirinivasan, Tetrahedron, 1967, 23, 1901. 6 N. C. Tewari, K. N. N. Ayengar, and S. Rangaswami, J.C.S. Perkin I, 1974, 146. H. S. Garg and C. R. Mitra, Phytochemistry, 1971, 10,865. 7 S. P. Gunasekera and M. U. S. Sultanbawa, J.C.S. Perkin I, 1977, 490. 8 F. D. Monache, J. F. de Mellow, G. B. Bettelo, 0. G. Delima, and I. L. D. Albuguergue, Gazzettcr, 1972, 102,636.
PY - 1979
Y1 - 1979
N2 - Formation of the photoproducts (10) and (12) and chemical and spectroscopic evidence suggest that kokoononol obtained from Kokoona zeylanica is 27-hydroxyfriedelane-3,21-dione (1); kokoondiol and kokoonol have been identified as 21α,27-dihydroxyfriedelan-3-one (2) and 27-hydroxyfriedelan- 3-one (3), respectively, by chemical conversions.
AB - Formation of the photoproducts (10) and (12) and chemical and spectroscopic evidence suggest that kokoononol obtained from Kokoona zeylanica is 27-hydroxyfriedelane-3,21-dione (1); kokoondiol and kokoonol have been identified as 21α,27-dihydroxyfriedelan-3-one (2) and 27-hydroxyfriedelan- 3-one (3), respectively, by chemical conversions.
UR - https://www.scopus.com/pages/publications/37049108726
UR - https://www.scopus.com/pages/publications/37049108726#tab=citedBy
U2 - 10.1039/C39790000434
DO - 10.1039/C39790000434
M3 - Article
AN - SCOPUS:37049108726
SN - 0022-4936
SP - 434
EP - 436
JO - Journal of the Chemical Society D: Chemical Communications
JF - Journal of the Chemical Society D: Chemical Communications
IS - 10
ER -