Synthesis of the Benzo[b]fluorene Core of the Kinamycins by Arylalkyne–Allene and Arylalkyne–Alkyne Cycloadditions
作者:Esther González-Cantalapiedra、Óscar de Frutos、Carmen Atienza、Cristina Mateo、Antonio M. Echavarren
DOI:10.1002/ejoc.200500926
日期:2006.3
Arylalkyne–allene and arylalkyne–alkyne cycloadditions yields benzo[a]fluorenones, which are related to the tetracyclic core of the kinamycins. In the arylalkyne–alkyne cycloadditions, we found a rearrangement that produces benzo[a]fluorenones, in addition to the expected benzo[b]fluorenones. This rearrangement could be suppressed in the presence of phenol, which allowed the synthesis of 4,9-dimet
芳炔-丙炔和芳炔-炔环加成产生苯并[a]芴酮,其与激霉素的四环核心有关。在芳炔-炔环加成反应中,除了预期的苯并[b]芴酮之外,我们还发现了产生苯并[a]芴酮的重排。这种重排可以在苯酚的存在下被抑制,从而能够以优异的产率合成 4,9-二甲氧基-2-甲基-11H-苯并[b]芴-11-酮。(© Wiley-VCH Verlag GmbH & Co . KGaA, 69451 德国魏因海姆, 2006)