Activities of New Dinuclear PEPPSI‐Precatalysts Bearing Bis‐benzimidazole Ligands in the Suzuki–Miyaura Coupling Reaction

Seven new PEPPSI (Pyridine‐Enhanced Precatalyst Preparation Stabilization and Initiation) type complex compounds containing bisbenzimidazole ligands were synthesized, and their structures were characterized by spectroscopic methods ( 1 H, 13 C‐NMR, IR, HRMS). The catalytic activities of PEPPSI‐precatalysts were tested in Suzuki‐Miyaura cross‐coupling reactions using phenylboronic acid, aryl bromides and aryl chlorides. It was observed that the precatalysts, having electron‐dense benzimidazole ligands (compounds 1 , 2 ), exhibited higher catalytic activity. In contrast, catalyst precursors having electron‐poor benzimidazole ligands were found to have lower catalytic activity (compound 7 ).