Suzuki cross-coupling of aryl bromides catalyzed by cyrhetrenylphosphine complexes of palladium (II)

The heterobimetallic Re–Pd complex (CO)3Re(η5-C5H4PPh2)PdCl2(NCMe) I and the chelated complexes (η5-C5H4PPh2)(CO)2PR3Re–PdCl2 (R = Me, II and R = OMe, III) were used as precatalyst for the Suzuki reaction. Complexes II and III containing a metal–metal bond were shown to be more efficient precatalyst for cross-coupling reaction of a wide range of aryl bromides electronically activated, unactivated and sterically hindered.