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The Ullmann-Goldberg reaction with anilines to give diarylamines can be carried out with Cu powder in water: Synth. Commun., 23, 1447 (1993). The reaction in DMF has been shown to be greatly accelerated by ultrasonic irradiation: Synth. Commun., 19, 2077 (1989). Ullmann-Goldberg reaction with phenols to give diaryl ethers gives improved results with pyridine as a co-catalyst: Synth. Commun., 25, 1077 (1995)./n
Gefahrenhinweise (EU): H319-H335
Causes serious eye irritation. May cause respiratory irritation.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.