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Communication | Regular issue | Vol 23, No. 8, 1985, pp.1863-1867
Published online, 1st January, 1970
DOI: 10.3987/R-1985-08-1863
Partial Syntheis of Dihydroisothysanolactone, and 13C-NMR Study of Thysanolactone

Norio Aimi,* Kazuhiro Kawada, Hiroshi Murakami, Yoshitaka Fukumasu, and Shin-ichiro Sakai

*Faculty of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

Abstract

Dihydroisothysanolactone (14) which has the diastereomeric construction of the bridged ring system of the A ring of the novel triterpene, thysanolactone (1), has been partially synthesized from an easily available triterpene, hydroxyhopanone (3). 13C-NMR assignment of all carbons of thysanolactone (1) has been made by the help of the reference compounds including the above newly prepared unnatural congener.