Catalysis Letters

, Volume 142, Issue 2, pp 251–258 | Cite as

A Highly Selective Pd(OAc)2/Pyridine/K2CO3 System for Oxidation of Terpenic Alcohols by Dioxygen

  • Danieli M. Carari
  • Márcio J. da Silva


Molecular sieves, complex organic bases and radical oxidants are commonly used in alcohols oxidation reactions. In this work, we have evaluated the beneficial effects of addition of K2CO3 to Pd(II)-catalyzed oxidation alcohols, which resulted in a remarkable increase in the oxidation reaction rates without selectivity losses. Herein, in a metallic reoxidant-free system, terpenic alcohols (β-citronellol, nerol and geraniol) were selectively converted into respective aldehydes from Pd(II)-catalyzed oxidation reactions in presence of dioxygen. High conversions and selectivities (greater than 90%) were achieved in the presence of the Pd(OAc)2/K2CO3 catalyst and pyridine excess. The exogenous role of others auxiliary anionic and nitrogen compounds was appraised.

Graphical Abstract

Reaction conditions: β-citronellol (2.75 mmol); Pd(OAc)2 (0.05 mmol); pyridine (5.0 mmol); K2CO3 (2.5 mmol); toluene (10 mL); MS3A (0.5 g); O2 (0.10 MPa); 60 °C.

Comparison of systems used in Pd(OAc)2-catayzed oxidation of β-citronellol by dioxygen


Palladium Terpenic alcohol Nitrogen ligand Dioxygen 



The authors are grateful for the financial support from CAPES, CNPq, FAPEMIG and FUNARBE (Brazil). They also wish to thank Prof. Luis Claudio Barbosa for the GC–MS analyses.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Departamento de QuímicaUniversidade Federal de ViçosaViçosaBrazil

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