Synthesis of dibenzofurans directly from aryl halides and ortho-bromophenols via one-pot consecutive SNAr and intramolecular palladium-catalyzed aryl-aryl coupling reactions

摘要

A series of dibenzofurans were efficiently and conveniently synthesized via one-pot consecutive C(sp(2))-O bond formation reaction (SNAr) in the presence of anhydrous K2CO3, followed by C(sp(2))-C(sp(2)) bond formation reaction (intramolecular palladium-catalyzed aryl-aryl coupling reaction) between aryl halides and ortho-bromophenols. The desired dibenzofurans were obtained in 32-99% isolated yields.