904744-12-3Relevant academic research and scientific papers
Preparation of a palladium dimer with a cobalt-containing bulky phosphine ligand: Its application in palladium catalyzed Suzuki reactions
Gan, Ya-Huei,Lee, Jian-Cheng,Hong, Fung-E.
, p. 3555 - 3561 (2006)
A palladium dimer with a cobalt-containing phosphine ligand, {(μ-PPh2CH2PPh2)Co2(CO)4(μ,η-(tBu)2PC{triple bond, long}CC6H4-κC1)Pd(μ-Cl)}2 (3), was prepared from the reaction of its monomer precursor, (μ-PPh2CH2PPh2)Co2(CO)4(μ,η-(tBu)2PC{triple bond, long}CC6H4-κC1)Pd(μ-OAc) (2), with LiCl. The crystal structure of 3, determined by X-ray diffraction methods, revealed a doubly chloride-bridged palladium dimeric conformation. Suzuki coupling reactions of bromobenzene with phenylboronic acid were carried out catalytically using these two novel palladium complexes 2 and 3 as catalyst precursors. Factors such as the molar ratio of substrate/catalyst, reaction temperature, base and solvent that might affect the catalytic efficiencies were investigated. As a general rule, the performance is much better by employing 3 than 2 as the catalyst precursor.
