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Synfacts 2014; 10(1): 0104
DOI: 10.1055/s-0033-1340396
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York

Ligand-Free C–C and C–O Cross-Couplings with Pd–ZnFe2O4

Rezensent(en):
Yasuhiro Uozumi
,
Aya Tazawa
Singh AS, Shendage SS, Nagarkar JM * Institute of Chemical Technology, Mumbai, India
Palladium Supported on Zinc Ferrite: An Efficient Catalyst for Ligand-Free C–C and C–O Cross-Coupling Reactions.

Tetrahedron Lett. 2013;
54: 6319-6323
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Publikationsverlauf

Publikationsdatum:
13. Dezember 2013 (online)

 
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Key words

palladium–zinc ferrite - cross-coupling - ligand-free

Significance

The superparamagnetic Pd–ZnFe2O4 catalyst was prepared by adding palladium nanoparticles into a suspension of ZnFe2O4 magnetic nanoparticles in water. Pd–ZnFe2O4 ­catalyzed the Sonogashira coupling (8 examples, eq. 1), the Heck–Matsuda coupling (10 examples, eq. 2), the cyanation of aryl halides (8 examples, eq. 3) and the Ullman coupling (11 examples, eq. 4).


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Comment

In the Sonogashira coupling of iodobenzene with phenylacetylene and the Ullmann coupling of 4-nitrochlorobenzene with phenol, the catalyst was recovered and reused twice without significant loss of catalytic activity.


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