The copper-catalysed reaction of N-arylsulphonamides with aryl bromides gives moderate to good yields of NN-diarylsulphonamides. The effect on yield of substituents is examined and the use of the synthesis as a route to unsymmetric diphenylamines is discussed.
I. G. C. Coutts and M. Hamblin, J. Chem. Soc., Perkin Trans. 1, 1975, 2445 DOI: 10.1039/P19750002445
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