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?

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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
UEA Research Groups:	Faculty of Science > Research Groups > Chemistry of Materials and Catalysis
Related URLs:	http://linkinghub.elsevier.com/retrieve/...
Depositing User:	Pure Connector
Date Deposited:	13 Jan 2017 00:07
Last Modified:	22 Oct 2022 02:07
URI:	https://ueaeprints.uea.ac.uk/id/eprint/62049
DOI:	10.1016/j.tet.2014.06.002

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