Formation and propagation of well-defined Pd nanoparticles (PdNPs) during C–H bond functionalization of heteroarenes: are nanoparticles a moribund form of Pd or an active catalytic species?

Baumann, Christoph G., De Ornellas, Sara, Reeds, Jonathan P., Storr, Thomas E., Williams, Thomas J. and Fairlamb, Ian J.S. (2014) Formation and propagation of well-defined Pd nanoparticles (PdNPs) during C–H bond functionalization of heteroarenes: are nanoparticles a moribund form of Pd or an active catalytic species? Tetrahedron, 70 (36). pp. 6174-6187. ISSN 0040-4020

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Abstract

Examination of a series of C–H bond functionalization reactions of heteroarenes (e.g., indole, benzoxazole, benzthiazole, benzimidazole and purine derivatives) mediated by Pd(OAc)2, a commonly used C–H bond functionalization catalyst, reveals that well-defined Pd nanoparticles (PdNPs) are rapidly formed under working catalyst conditions. The PdNPs can be characterized ex situ after entrapment in a polymer matrix (polyvinylpyrrolidinone, PVP). Independently synthesized Pd(PVP)NPs are catalytically competent species, exhibiting catalyst activity commensurate with Pd(OAc)2 in several C–H bond functionalization reactions. Across a range of reactions, Pd concentration is a common variable, which can be linked to the propagation of PdNPs under working catalytic conditions using polar solvents like DMF, DMSO and acetic acid.

Item Type: Article
Uncontrolled Keywords: palladium,nanoparticles,cross-coupling,catalysis
Faculty \ School: Faculty of Science > School of Chemistry
Related URLs:
Depositing User: Pure Connector
Date Deposited: 13 Jan 2017 00:07
Last Modified: 22 Apr 2020 02:26
URI: https://ueaeprints.uea.ac.uk/id/eprint/62049
DOI: 10.1016/j.tet.2014.06.002

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