Issue 11, 2011
From the journal:

Green Chemistry

Ruthenium diacetate-catalysed oxidative alkenylation of C–H bonds in air: synthesis of alkenyl N-arylpyrazoles†

Percia B. Arockiam,a   Cedric Fischmeister,a   Christian Bruneau*a  and  Pierre H. Dixneuf*a  

* Corresponding authors

a UMR 6226-CNRS-Université de Rennes 1, Institut Sciences Chimiques, Catalyse et Organométalliques, Campus de Beaulieu, Rennes cedex, France
E-mail: pierre.dixneuf@univ-rennes1.fr

Abstract

Ru(OAc)2(p-cymene) catalyses the directed dehydrogenative alkenylation of N-aryl pyrazoles by styrene and alkyl acrylates in the presence of a catalytic or stoichiometric amount of Cu(OAc)2·H2O in air; the acetic acid solvent plays a key role. With arene electron-donating groups, ruthenium-catalysed ortho-dialkenylation with alkyl acrylates can be obtained. A new method to generate the oxidative homocoupling of N-phenylpyrazole is provided with the Ru(OAc)2(p-cymene) catalyst.

Graphical abstract: Ruthenium diacetate-catalysed oxidative alkenylation of C–H bonds in air: synthesis of alkenyl N-arylpyrazoles

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Article information

DOI
https://doi.org/10.1039/C1GC15875A
Article type
Communication
Submitted
19 Jul 2011
Accepted
08 Aug 2011
First published
12 Sep 2011

Green Chem., 2011,13, 3075-3078

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Ruthenium diacetate-catalysed oxidative alkenylation of C–H bonds in air: synthesis of alkenyl N-arylpyrazoles

P. B. Arockiam, C. Fischmeister, C. Bruneau and P. H. Dixneuf, Green Chem., 2011, 13, 3075 DOI: 10.1039/C1GC15875A

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