Synthesis of <i>s</i>-Indacene Derivatives by Double Robinson-Type Cyclopentene Annulation
作者:Jens Christoffers、Yawei Zhang
DOI:10.1055/s-2007-983901
日期:2007.10
Michael reactions of 2,5-dioxocyclohexane-1,4-dicarboxylates with methyl vinyl ketone yield bis-adducts that can be further cyclized in a Robinson-type annulation to give s-indacene derivatives as single diastereomers. The carboxylate functions of this scaffold can be deprotected and subsequently decarboxylated to yield tricyclic products with a central aromatic ring.
s-Indacene derivatives are obtained as single diastereoisomers by a Robinson-type annulation of 2,5-cyclohexandione-1,4-dicarboxylates with methyl vinyl ketone. Hydrogenative debenzylation and subsequent decarboxylation yields tricyclic products with a central aromatic ring.