A new approach to the total synthesis of the unusual diterpenoid tropone, harringtonolide
作者:Hongbin Zhang、David C. Appels、David C.R. Hockless、Lewis N. Mander
DOI:10.1016/s0040-4039(98)01370-7
日期:1998.9
The Diels Alder reactions of 5-methoxyindenone followed by intramolecular cyclopropanation provide the basis for a new and more efficient approach to the synthesis of the unusualditerpenoidtropone, harringtonolide.
Organoiron complexes in organic synthesis. Part 6. Dienolonium equivalents: tricarbonyl-[1-alkoxy-2-(1–5-η-4-methoxycyclohexa-2,4dienylium)ethane]iron hexafluorophosphates and related complexes leading to masked 4,4-disubstituted cyclohexenones
作者:Anthony J. Pearson、Malcolm Chandler
DOI:10.1039/p19800002238
日期:——
ron hexafluorophosphate (2i) react with sodiomalononitrile highly regioselectively to give functionalised gem-disubstituted cyclohexadiene complexes which are potential precursors of 4,4-disubstituted cyclohexenones. The reactions of these and related complexes with other carbanions are also reported.
Model studies toward the synthesis of the bioactive diterpenoid, harringtonolide
作者:Timothy P. O'Sullivan、Hongbin Zhang、Lewis N. Mander
DOI:10.1039/b707467k
日期:——
In modelstudies towards the synthesis of harringtonolide, the construction of the tropone moiety via arene cyclopropanation was investigated. The installation of the lactone ring was accomplished by way of a Diels-Alder cycloaddition of various indenones and a-pyones. The incorporation of the key bridge methyl group and subsequent control of its stereochemistry is also outlined.