Article (Scientific journals)
Imidazol(in)ium-2-carboxylates as N-heterocyclic carbene precursors for the synthesis of second generation ruthenium metathesis catalysts
Sauvage, Xavier; Demonceau, Albert; Delaude, Lionel
2009In Advanced Synthesis and Catalysis, 351 (11-12), p. 2031-2038
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Keywords :
alkene metathesis; homogeneous catalysis; N-heterocyclic carbenes; phosphane ligands; ruthenium; zwitterions
Abstract :
[en] Five well-known ruthenium-N-heterocyclic carbene (NHC) catalysts for olefin metathesis and related reactions, including the second generation Grubbs and Hoveyda-Grubbs catalysts, were prepared by phosphane exchange between first generation ruthenium-benzylidene or indenylidene complexes and NHCs generated in situ upon thermolysis of imidazol(in)ium-2-carboxylates. Because N-heterocyclic carbene -carbon dioxide adducts (NHC · CO2) are stable zwitterionic compounds that can be stored and handled with no particular precautions, this procedure is particularly attractive from a practical point of view. Reaction courses were conveniently monitored by 31P NMR spectroscopy and the experimental conditions were carefully adjusted to obtain high yields of pure products within short periods of time.
Disciplines :
Chemistry
Author, co-author :
Sauvage, Xavier ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Demonceau, Albert ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Delaude, Lionel  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Language :
English
Title :
Imidazol(in)ium-2-carboxylates as N-heterocyclic carbene precursors for the synthesis of second generation ruthenium metathesis catalysts
Publication date :
2009
Journal title :
Advanced Synthesis and Catalysis
ISSN :
1615-4150
eISSN :
1615-4169
Publisher :
Wiley-V C H Verlag Gmbh, Weinheim, Germany
Volume :
351
Issue :
11-12
Pages :
2031-2038
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 August 2009

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