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Suzuki–Miyaura cross-coupling of aryl iodides and phenylboronic acid over palladium-free CeO2 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
39580 45828 2014 7 PDF Available
Title
Suzuki–Miyaura cross-coupling of aryl iodides and phenylboronic acid over palladium-free CeO2 catalysts
Abstract

•The Suzuki–Miyaura reaction is carried out over a noble metal-free catalyst.•Ceria is active for the cross coupling of p-iodotoluene and phenylboronic acid.•Ceria activity and selectivity for the SM reaction depends on pre-treatment.•Acid sites on ceria surface are active for Suzuki–Miyaura reaction.

The Suzuki–Miyaura cross-coupling reaction between p-iodotoluene and phenylboronic acid is carried out over a series of ceria catalysts, at 150 °C, under N2 atmosphere, employing DMF as the solvent. The ceria catalysts present different BET area (determined from N2 isotherms at 77 K), different Ce4+/Ce3+ ratio (as measured by XPS), and different concentration and strength of acid sites (as measured by potentiometric titration with n-butylamine). The activity of the different samples depends on the concentration and strength of acid sites, although the participation of Ce3+ centers should not be neglected. Ceria catalysts are less active and less selective than a Pd/SiO2 sample. Although the catalytic performance of ceria catalysts is lower than the one corresponding to Pd/SiO2, the fact that a transition metal-free catalyst is active for SM reaction is highlighted.

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Keywords
Ceria; Suzuki–Miyaura; Cross-coupling; Acid sites; Ce3+/Ce4+
First Page Preview
Suzuki–Miyaura cross-coupling of aryl iodides and phenylboronic acid over palladium-free CeO2 catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 482, 22 July 2014, Pages 24–30
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis