Synthesis of cis-hydrindan-2,4-diones bearing an all.carbon quaternary center by a Danheiser annulation

Abstract

A straightforward synthetic entry to functionalized hydrindane compounds based on a rapid assembly of the core nucleus by a Danheiser cycloaddition is reported. Valuable bicyclic building blocks containing the fused five and six-membered carbocyclic ring system can be achieved in only four steps from a simple acyclic β-keto ester. Keywords: alkaloid; Danheiser annulation; decahydroquinoline