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DOI: 10.1055/s-2005-862380
The Pauson-Khand-Type Reaction Catalyzed by Transition Metal Nanoparticles
Publication History
Received
14 October 2004
Publication Date:
22 February 2005 (online)


Abstract
In this account, we survey our work on the use of transition metal nanoparticles as catalysts in Pauson-Khand-type reactions. Cobalt nanoparticles and Co/Ru, Co/Rh, and Co/Pd heterobimetallic nanoparticles have been used in Pauson-Khand-type reactions and related tandem reactions. In the case of Co/Ru nanoparticles, pyridylmethylformate can be used instead of carbon monoxide. We have developed environmentally friendly processes. The use of Co/Rh heterobimetallic nanoparticles allows the development of a new type of [2+2+1] cycloaddition of an α,β-unsaturated aldehyde with an alkyne.
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1 Introduction
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2 Cobalt on Mesoporous Silica: The First Heterogeneous PKR Catalyst
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3 Colloidal Cobalt Nanoparticles
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3.1 The First Use of Transition Metal Nanoparticles in the PKR
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3.2 The First Catalytic PKR in Aqueous Media: Water-Stabilized Colloidal Cobalt Nanoparticles
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4 Immobilized Cobalt Nanoparticles on Charcoal
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4.1 Pauson-Khand Reaction
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4.2 The Catalytic Reductive Pauson-Khand Reaction
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5 Heterobimetallic Nanoparticles
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5.1 Ru/Co Heterobimetallic Nanoparticles: Catalytic Pauson-Khand Reactions in the Presence of Pyridylmethylformate
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5.2 Rh/Co Heterobimetallic Nanoparticles: Catalytic Pauson-Khand-Type Reaction between Alkynes and Olefinic Aldehydes
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5.3 Palladium and Cobalt Nanoparticles Immobilized on Silica: One-Pot Synthesis of Bicyclic Enones by Catalytic Allylic Alkylation and Pauson-Khand Reaction
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6 Use of a Combination of Cobalt Nanoparticles and Pd(II) Complex as a Catalyst in the Synthesis of Fenestranes
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7 Conclusion
Key words
Pauson-Khand reaction - cobalt - heterobimetallic - nanoparticles - heterogeneous catalysis