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Gold-Catalysis: Reactions of Organogold Compounds with Electrophiles
A. Stephen K.
Hashmi A C,
Tanuja Dondeti
Ramamurthi A,
Matthew H.
Todd B,
Althea S.-K.
Tsang A B and
Katharina
Graf A
A
Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany. B
School of Chemistry, University of Sydney, NSW 2006, Australia. C
Corresponding author. Email: hashmi@hashmi.de
Australian Journal of Chemistry
63(12)
1619-1626 http://dx.doi.org/10.1071/CH10342
Submitted: 15 September 2010 Accepted: 18 October 2010 Published:
6
December
2010
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Abstract
Different arylgold(i), one alkynylgold(i), and one vinylgold(i) triphenylphosphane complexes were subjected to electrophilic halogenation reagents. With N-chlorosuccinimid, N-bromosuccinimid, and N-iodosuccinimid as well as the Barluenga reagent, selectively halogenated compounds were obtained. Trifluoroacetic acid, as a source of protons, leads to a clean protodeauration. With N-fluorobenzenesulfonimide or Selectfluor, exclusively a homocoupling was observed. For the precursor of the vinylgold(i) complex, a similar oxidative coupling could be induced by gold(iii) chloride. Reactions with silicon or tin electrophiles failed. 
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