Efficient synthesis of functionalized dibenzofurans by domino 'twofold Heck/6π-electrocyclization' reactions of 2,3-di- and 2,3,5-tribromobenzofuran

Functionalized dibenzofurans were prepared based on domino 'twofold Heck/6π-electrocyclization' reactions of 2,3-di- and 2,3,5-tribromobenzofuran.