Pd(II)-Catalyzed Hiyama Cross-Coupling Using a Water-Soluble
Ligand System

S.-N. Chen; W.-Y. Wu; F.-Y. Tsai

doi:10.1055/s-0028-1087452

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Synfacts 2009(1): 0086-0086
DOI: 10.1055/s-0028-1087452

Metal-Mediated Synthesis

Pd(II)-Catalyzed Hiyama Cross-Coupling Using a Water-Soluble Ligand System

Contributor(s): Paul Knochel, Andreas J. Wagner
S.-N. Chen, W.-Y. Wu, F.-Y. Tsai*
National Taipei University of Technology, Taipei, Taiwan

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Publikationsverlauf

Publikationsdatum:
18. Dezember 2008 (online)

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Significance

A Pd(NH₃)₂Cl₂/cationic bipyridyl catalytic system is able to efficiently catalyze the cross-coupling reaction of aryl bromides with arylsiloxanes in water under aerobic conditions in the presence of NaOH to afford biaryls in good to excellent yields. After extraction, the residual aqueous phase can be used several times with only a minor decrease in catalyst activity.