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Synlett 2001; 2001(10): 1527-1530
DOI: 10.1055/s-2001-17488
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Nickel-catalyzed Ullmann-type Coupling Reaction to Prepare Tetra-ortho-substituted Biaryls

Ran Hong* , Rob Hoen, Jing Zhang, Guo-qiang Lin
  • *Shanghai Institute of Organic Chemistry, CAS, 354 Fenglin Road, Shanghai 200032, P. R. China; E-mail: lingq@pub.sioc.ac.cn
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Publikationsdatum:
27. September 2001 (online)

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A nickel-catalyzed Ullmann-type reaction on the coupling of bis-ortho-substituted arylhalides to prepare tetra-ortho-biaryls was brought about in moderate to high yields. Bu4NI might function as an efficient bridging ligand to accelerate the formation of dinickel-center intermediate, which subsequently eliminates to desired coupling product.

nickel - Ullmann-type reaction - tetra-ortho-substituted biaryls - bridging ligand