Synthesis of (+)-trixagol and its enantiomer, the terpenoid side chain of (−)-agelasine E
作者:Anne Kristin Bakkestuen、Lise-Lotte Gundersen
DOI:10.1016/s0040-4020(02)01455-2
日期:2003.1
The naturally occurring gamma-cyclogeranylgeraniol called (+)-trixagol has been synthesised for the first time. Trixagol was readily available in five steps from (S)-2,2-dimethyl-6-methylene-1-cyclohexanemethanol. The enantiomer of trixagol, which equates to the terpenoid side chain of the naturally occurring 7,9-dialkylpurinium salt (-)-agelasine E, was prepared from the (R) enantiomer of the cyclohexanemethanol. Both trixagol enantiomers were moderately active against Mycobacterium tuberculosis. (C) 2002 Elsevier Science Ltd. All rights reserved.
A General Strategy for the Stereoselective Synthesis of the Furanosesquiterpenes Structurally Related to Pallescensins 1–2
作者:Stefano Serra
DOI:10.3390/md17040245
日期:——
Here, we describe a general stereoselective synthesis of the marine furanosesquiterpenes structurallyrelated to pallescensins 1-2. The stereoisomeric forms of the pallescensin 1, pallescensin 2, and dihydropallescensin 2 were obtained in high chemical and isomeric purity, whereas isomicrocionin-3 was synthesized for the first time. The sesquiterpene framework was built up by means of the coupling