Tetradentate N₂O₂ Chelated Palladium(II) Complexes: Synthesis, Characterization, and Catalytic Activity towards Mizoroki‐Heck Reaction of Aryl Bromides

Abstract

Four air and moisture‐stable palladium(II)‐Schiff base complexes, N,N ′‐bis( α ‐methylsalicylidene)propane‐1,3‐diamine palladium(II) ( 2a ), N,N ′‐bis(4‐methyl‐ α ‐methylsalicylidene)propane‐1,3‐diamine palladium(II) ( 2b ), N,N ′‐bis(3,5‐di‐tert‐butylsalicylidene)propane‐1,3‐diamine palladium(II) ( 2c ), and N,N ′‐bis(4‐methoxy‐salicylidene)propane‐1,3‐diamine palladium(II) ( 2d ), have been successfully synthesised and characterised by CHN elemental analyses and conventional spectroscopic methods. These complexes were investigated as catalysts in the phosphine‐free Mizoroki‐Heck cross‐coupling reactions of aryl bromides with methyl acrylate.