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were achieved for the hydrogenation of trans-stilbene exceeding
not only all literature reports for supported Pd nanoparticles,
but also comparable Pd/C catalysts by far. Furthermore, the cat-
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The particles were rapidly separated by applying an external
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These novel magnetic nanocatalysts are superior to the
industry standard Pd/C in every relevant aspect. They feature a
way higher initial activity, a much more convenient separation,
better recycling, and less contamination of the products. Last
but not least, they can be very easily prepared from commer-
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4. Experimental Section
Representative Procedure for the Microwave Synthesis of Pd@Co/C
Catalyst 2f: Co/C nanoparticles 1 (1.0 g, 7.8 wt% C), Pd2(dba)3·CHCl3
(7.8 mg, 15 mmol) and dry toluene (5 mL) were introduced to a
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General Procedure for the Hydrogenation Using Pd@Co/C: To a schlenk
tube Pd@Co/C nanoparticles 2 (0.1 mol% Pd, 0.5 μmol), substrate
i
(0.5 mmol) and PrOH (5 mL) were introduced. Dodecane (0.5 mmol)
was added as internal standard and the slurry sonicated in an ultrasonic
bath for 10 min. The tube was evaporated and flushed with H2 several
times followed by vigorous stirring under 1 atm H2 (balloon). The
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Supporting Information
Supporting Information is available from the Wiley Online Library or
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Acknowledgements
This work was financially supported by the International Doctorate
Program (Elitenetzwerk Bayern), the Deutsche Forschungsgemeinschaft
(DFG) (Re 948/8–1, “GLOBUCAT’’), and the EU-ITN network Mag(net)
icFun (PITN-GA-2012–290248). We thank Turbobeads Llc for generously
providing the magnetic nanobeads. We gratefully acknowledge the help of
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Received: September 23, 2013
Published online: November 20, 2013
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