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Synfacts 2009(10): 1142-1142  
DOI: 10.1055/s-0029-1217892
Metal-Mediated Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Ullmann-Type Couplings Using Part-Per-Million Catalyst Loadings

Contributor(s): Paul Knochel, Tobias Thaler
P.-F. Larsson, A. Correa, M. Carril, P.-O. Norrby*, C. Bolm*
University of Gothenburg, Sweden and RWTH Aachen University, Germany
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Publikationsdatum:
22. September 2009 (online)

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Significance

Ullmann-type coupling reactions with part-per-million loadings of copper catalyst are reported. This coupling was shown to work well at high temperatures for N-, O-, and S-arylations. High temperatures and high ligand loadings are crucial for the reaction to take place.