Selective Aromatic N-Substitution with N-(4-Tolyl)hydroxylamine by Addition of Polar Aprotic or Diethereal Solvent
Amination of anisole and toluene with N-(4-tolyl)hydroxylamine in trifluoroacetic acid was tuned to regioselectively provide the corresponding diarylamine by partial replacement of trifluoroacetic acid with a polar aprotic or a diethereal solvent. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.