Heterogeneous Suzuki cross-coupling reactions over palladium/hydrotalcite catalysts.
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 degrees 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.
Mora
Manuel
M
Departamento de Química Orgánica, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, Ctra Nacional IV-A, km 396, 14014 Córdoba, Spain.
Jiménez-Sanchidrián
César
C
Ruiz
J Rafael
JR
D000327:Adsorption; D000536:Aluminum Hydroxide / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D001897:Boronic Acids / Q000737:chemistry; D001969:Bromobenzenes / Q000737:chemistry; D002384:Catalysis; D008276:Magnesium Hydroxide / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D012680:Sensitivity and Specificity; D012997:Solvents / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods; D013499:Surface Properties; D013696:Temperature
D000536:Aluminum Hydroxide; D001713:Biphenyl Compounds; D001897:Boronic Acids; D001969:Bromobenzenes; D008276:Magnesium Hydroxide; D009942:Organometallic Compounds; D010165:Palladium; D012997:Solvents; C010467:hydrotalcite; C010574:biphenyl; C032036:bromobenzene; C010686:benzeneboronic acid