Showing papers by "Angelo C. Pinto published in 1984"
TL;DR: In this paper, a triterpene not previously obtained from natural sources has been isolated from Vellozia compacta and its structure assigned on the basis of spectral data.
Abstract: A triterpene not previously obtained from natural sources has been isolated from Vellozia compacta and its structure assigned on the basis of spectral data. For confirmation of this assignment, a partial synthesis was carried out. β-Amyrenyl acetate was oxidized and the resulting ketone reduced to a diol, which, after selective dehydration and reoxidation, furnished the natural product.
21 citations
TL;DR: Vellozia piresiana contains β-sitosterol, stigmasterol, taraxerone, compactone, 7β,8β-dihydroxy-3-oxopimar-15-ene and three new diterpenes, one of the pimarane type and the other two with a cleistanthane skeleton as discussed by the authors.
12 citations
TL;DR: In this article, the isolation of a new naphthalenic nor-cleistanthane diterpene from Vellozia epidendroides and V. phalocarpa is described.
2 citations