Preparations of Furans from α-Bromo Ketones and Enol Ethers Catalyzed by a Rhenium(I) Nitrogen Complex

Article abstract of DOI:10.1246/bcsj.71.475

By the catalytic use of a rhenium(I) nitrogen complex, [ReCl(N₂)(PMe₂Ph)₄], α-keto radicals are generated from α-bromo ketones and react with vinyl ethers and silyl enol ethers intermolecularly. Various substituted furans, including tetrasubstituted furans such as furoguaiacin, are prepared by this method.