CuBr2-promoted cyclization and bromination of arene–alkynes: C–Br bond formation via reductive elimination of Cu(iii) species†
Abstract
A CuBr2-promoted cyclization and bromination of arene–alkyne substrates has been developed, affording 9-bromophenanthrene derivatives highly efficiently. This reaction provides a novel and efficient protocol for C–Br bond formation from an inorganic bromine source via the reductive elimination of the Cu(III) species.