Journal
APPLIED CATALYSIS A-GENERAL
Volume 455, Issue -, Pages 39-45Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2013.01.023
Keywords
Copper nanoparticles; Magnetic support; Alkyne; Coupling; Cycloaddition
Categories
Funding
- CONICET from Argentina [PIP 738]
- ANPCyT from Argentina [669]
- SGCyT-UNS from Argentina [PGI 24/Q044]
- CONICET
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A versatile and magnetically recoverable catalyst consisting of copper nanoparticles on silica coated maghemite nanoparticles (MagSilica (R)) is presented. The catalyst has been prepared under mild conditions by fast reduction of anhydrous CuCl2 with lithium sand and a catalytic amount of DTBB (4,4'-di-tert-butylbiphenyl) as electron carrier, in the presence of the magnetic support. The catalyst has been fully characterized and its performance in different coupling and cycloaddition reactions of terminal alkynes has been studied. This new copper-based catalyst has shown to be very efficient and easily reusable in the Glaser alkyne dimerization reaction in THF, the multicomponent Huisgen 1,3-dipolar cycloaddition reaction in water and the three-component synthesis of propargylamines under solvent free conditions. (c) 2013 Elsevier B.V. All rights reserved.
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