RADIVOY gabriel Eduardo
Suzuki-Miyaura cross-coupling of aryl iodides and phenylboronicacid over palladium-free CeO2 catalysts
A. DIEZ; M. GRAZIANO MAYER; G. RADIVOY; M. A. VOLPE
APPLIED CATALYSIS A-GENERAL
ELSEVIER SCIENCE BV
Lugar: Amsterdam; Año: 2014 vol. 482 p. 24 - 30
The Suzuki-Miyaura cross-coupling reaction between p-iodotoluene and phenylboronic acid is carriedout over a series of ceria catalysts, at 150◦C, under N2atmosphere, employing DMF as the solvent. The ceriacatalysts present different BET area (determined from N2isotherms at 77 K), different Ce4+/Ce3+ratio (asmeasured by XPS), and different concentration and strength of acid sites (as measured by potentiometrictitration with n-butylamine). The activity of the different samples depends on the concentration andstrength of acid sites, although the participation of Ce3+centers should not be neglected. Ceria catalystsare less active and less selective than a Pd/SiO2sample. Although the catalytic performance of ceriacatalysts is lower than the one corresponding to Pd/SiO2, the fact that a transition metal-free catalyst isactive for SM reaction is highlighted.