Synthesis of cis-hydrindan-2,4-diones bearing an all-carbon quaternary center by a Danheiser annulation (Beilstein Journal of Organic Chemistry)

Abstract A straightforward synthetic item 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. Beilstein J. Org. Chem. 2018, 14, 2597–2601. doi:10.3762/bjoc.14.237