Heterogeneous Suzuki cross-coupling reactions over palladium/hydrotalcite catalysts

• Published in: Journal of colloid and interface science Vol. 302; no. 2; pp. 568 - 575
• Main Authors: Mora, Manuel, Jiménez-Sanchidrián, César, Ruiz, J. Rafael
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 15.10.2006; Elsevier
• Subjects: Adsorption; Aluminum Hydroxide - chemistry; Biphenyl Compounds - chemical synthesis; Biphenyl Compounds - chemistry; Boronic Acids - chemistry; Bromobenzene; Bromobenzenes - chemistry; Catalysis; Chemistry; Exact sciences and technology; General and physical chemistry; Hydrotalcite; Magnesium Hydroxide - chemistry; Magnetic Resonance Spectroscopy - methods; Molecular Structure; Organometallic Compounds - chemical synthesis; Organometallic Compounds - chemistry; Palladium - chemistry; Palladium catalyst; Particle Size; Phenylboronic acid; Sensitivity and Specificity; Solvents - chemistry; Spectrophotometry, Infrared - methods; Surface Properties; Suzuki cross-coupling reaction; Temperature; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Phenylboronic acid; Bromobenzene; Hydrotalcite; Palladium catalyst; Suzuki cross-coupling reaction; Acids; Transition metal; Palladium; Platinoid; Catalyst
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2006.06.058

The efficiency of various heterogeneous solids consisting of palladium supported on hydrotalcite as catalysts in the Suzuki cross-coupling reaction between bromobenzene and phenylboronic acid was studied. Based on the catalytic activity results, the reaction develops to an acceptable extent with 100% selectivity at moderate temperatures in the presence of some of the catalysts. The best results were provided by a catalyst consisting of an acetate–pyridine complex of Pd supported on hydrotalcite that gave high conversion values even after three reuses. The reactions conditions were very mild (a temperature of 55 °C and atmospheric pressure). In fact, the catalyst provided conversion and selectivity results surpassing those of existing heterogeneous phase catalysts and most homogeneous phase catalysts for the same purpose.