Synthesis of fused acetals by ceric ammonium nitrate mediated cycloaddition of 1,3-dicarbonyl compounds to cyclic enol ethers

Article abstract of DOI:10.1016/0040-4020(96)00728-4

Treatment of β-diketones and β-ketoesters with ceric ammonium nitrate and sodium hydrogen carbonate in acetonitrile leads to the formation of intermediates which add efficiently to cyclic enol ethers to furnish fused acetals in good yields.