Abstract
The heterobimetallic Re–Pd complex (CO) 3 Re(η 5 -C 5 H 4 PPh 2 )PdCl 2 (NCMe) I and the chelated complexes (η 5 -C 5 H 4 PPh 2 )(CO) 2 PR 3 Re–PdCl 2 (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. The palladium-catalyzed Suzuki cross-coupling of aryl bromides and phenyl boronic acid has been investigated for the first time using heterobimetallic complexes based on phosphinocyrhetrene ligands and showed good catalytic activity. ► Phosphinocyrhetrene–Pd(II) complexes are effective precatalyst for Suzuki reaction. ► Chelated bimetallic complexes with a Re―Pd bond, improve catalytic activity. ► A wide range of activated and unactivated substrates afford high conversions.
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