Synlett 2013; 24(15): 1877-1881
DOI: 10.1055/s-0033-1339669
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© Georg Thieme Verlag Stuttgart · New York

[Pd(NHC)(PR3)] Complexes: Versatile Tools for Tandem Dehydrogenation–Hydrogenation Processes

Olivier Songis
EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK   Fax: +44(0)1334463808   eMail: cc111@st-andrews.ac.uk
,
Catherine S. J. Cazin*
EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK   Fax: +44(0)1334463808   eMail: cc111@st-andrews.ac.uk
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Publikationsverlauf

Received: 28. Juni 2013

Accepted after revision: 01. August 2013

Publikationsdatum:
23. August 2013 (online)


Abstract

Homogeneous Pd(0) complexes are powerful tools for numerous catalytic reactions. Recent work has demonstrated the unique properties displayed by [Pd(NHC)(PR3)] catalysts in the activation of ammonia borane (AB) and formic acid, with the subsequent formation of hydrogen. An understanding of the mechanism allowed for the design of a new dehydrogenation–hydrogenation tandem process using ‘hydrogen storage materials’. The hydrogenations of alkenes and alkynes were successfully performed at low catalyst loadings of Pd(0) species and mild conditions. Such tandem process represents a safe and innovative alternative to classic hydrogenation protocols.

 
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