A new precatalyst for the Suzuki reaction—a pyridyl-bridged dinuclear palladium complex as a source of mono-ligated palladium(<scp>0</scp>)

Abstract

A dinuclear pyridyl-bridged palladium complex, trans-(P,N)-[PdBr(μ-C5H4N-C2,N)(PPh3)]21, was obtained from material isolated from the Suzuki cross-coupling reaction of 2-bromopyridine with 2,4-difluorophenylboronic acid in the presence of catalytic (PPh3)4Pd. Complex 1 is an effective precatalyst for the Suzuki cross-coupling reactions of a variety organoboronic acids and aryl bromides, and represents a useful source of mono-ligated palladium(0), “(Ph3P)Pd(0)”.