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), andN,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.

Mesoporous Palladium N,N’-Bis(3-Allylsalicylidene)o-Phenylenediamine-Methyl Acrylate Resins as Heterogeneous Catalysts for the Heck Coupling Reaction

“…The N,N’-bis(3-allylsalicylidene)o-phenylenediamine (AS) and N,N’-bis(salicylidene)o-phenylenediamine (SALOPHEN) ligands were synthesized according to previously described literature methods [46]. The desired PdAS and Pd-SALOPHEN complexes were then prepared from Pd(CH 3 CO 2 ) 2 (a Pd(II) precursor) and the appropriate AS or SALOPHEN ligand, as described in the literature [49,50]. Characterization details for the ligands and the Pd(II)-complexes can be found in the supplementary material.…”