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The Ullmann condensation or Ullmann ether synthesis is a variation of the Ullmann reaction, in which a phenol is coupled to an aryl halide to a diaryl ether in the presence of a copper compound. The corresponding aniline or aryl amide reaction is sometimes called Goldberg reaction, named after Irma Goldberg.
Additional recommended knowledge
Recently an Ullmann-type aromatic amination reaction between an aryl iodide and an aryl amine as coupling partners has been published. The catalyst used is formed from copper(I) iodide and phenanthroline. As this reaction proceeds well with an electron-rich aryl iodide it is a valuable alternative to the Buchwald-Hartwig amination reaction, which gives best yields with electron-poor aryl halides.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ullmann_condensation". A list of authors is available in Wikipedia.|