Enantiospecific synthesis of (+)-puupehenone from (−)-sclareol and protocatechualdehyde
摘要:
The first enantiospecific synthesis of the antitumor and cholesteryl ester transfer protein (CETP) inhibitor (+)-puupehenone (19) from (-)-sclareol (10) and protocatechualdehyde (4) is described. The key steps of the reaction sequence are the organoselenium-induced cyclization of the mixture of regioisomers 15a-b to give 16 and 17, with complete diastereoselectivity, and the simultaneous removal of benzyl and phenylselenyl groups of 16 and 17 by treating with Raney Ni. (C) 1997 Elsevier Science Ltd.
Chemistry of Puupehenone: 1,6-Conjugate Addition to Its Quinone−Methide System
作者:Jordan K. Zjawiony、Piotr Bartyzel、Mark T. Hamann
DOI:10.1021/np9802062
日期:1998.12.1
The marine natural product puupehenone (1), isolated in good yields from sponges of the genus Hyrtios, has been shown to undergo stereospecific 1,6-conjugate addition to its quinone-methide system. Several nucleophilic agents such as hydrogen cyanide, Grignard reagents, and nitroalkanes were studied, producing structurally diverse compounds. This lead optimization study was initiated due to the bioactivity
[formula: see text] The totalsynthesis of the marinesesquiterpenequinone (+)-puupehenone, a promising new antituberculosis agent, was achieved in 10 steps starting from commercially available (+)-sclareolide. The key feature of this synthesis is the construction of the heterocycle via an intramolecular attack of the terpenoid-derived C-8 oxygen function onto an oxidatively activated 1,2-dihydroxyphenyl
Crystal and molecular structure of 11α-methoxypuupehenol diacetate
作者:S. G. Ilyin、N. K. Utkina、S. A. Fedoreyev、A. I. Yanovsky
DOI:10.1007/bf02494794
日期:2000.3
Puupehenone from the sea spongeDysidea sp. was converted into 11α-methoxypuupehenol diacetate. The crystal and molecularstructure of the title compound was established by X-ray diffraction analysis.
来自海绵Dysidea sp.的Puupehenone。转化为 11α-甲氧基紫杉醇二乙酸酯。标题化合物的晶体和分子结构通过 X 射线衍射分析确定。