Total Synthesis of (±)-Terpestacin and (±)-11-epi-Terpestacin
摘要:
The total synthesis of racemic terpestacin and 11-epi-terpestacin using the allene ether Nazarov reaction as the key step is described. All stereochemistry is derived from the stereogenic carbon atom that is formed during the Nazarov reaction.
Traceless Chiral Auxiliaries for the Allene Ether Nazarov Cyclization
作者:April R. Banaag、Marcus A. Tius
DOI:10.1021/jo801503c
日期:2008.11.7
The key stereochemical factors that determine transfer of asymmetry from the chiral auxiliary to the cyclopentenone in the allene ether version of the Nazarov reaction have been elucidated. On the basis of the new insights into the mechanism, two highly effective chiral auxiliaries were designed and prepared.
Total Synthesis of (±)-Terpestacin and (±)-11-<i>epi</i>-Terpestacin
作者:Gideon O. Berger、Marcus A. Tius
DOI:10.1021/jo070923d
日期:2007.8.1
The total synthesis of racemic terpestacin and 11-epi-terpestacin using the allene ether Nazarov reaction as the key step is described. All stereochemistry is derived from the stereogenic carbon atom that is formed during the Nazarov reaction.
Terpestacin Core Structure. Control of Stereochemistry
作者:Gideon O. Berger、Marcus A. Tius
DOI:10.1021/ol052015d
日期:2005.10.1
[reaction: see text] The alpha-hydroxycyclopentenone corestructure of terpestacin has been prepared in a model system through an allene ether Nazarov cyclization of an alkylidene-gamma-butyrolactone followed by regio- and stereoselective alkylation reactions. The stereochemistry at C15 (terpestacin numbering) has been used to control stereochemistry at C1 and at C23. The use of E-alkylidene-gamma-butyrolactones