1: p-toluenesulfonyl chloride With pyridine; 4-(N,N-dimethlyamino)pyridine T=20°C; 0.25 h; 2: 2,3,4,5,6-pentafluoroaniline Heating;

1: dipotassium hydrogenphosphate; palladium diacetate; silver carbonate; p-benozquinone / 1,1-dimethylpropan-1-ol / 24 h / 110 °C / Sealed tube; Under air 2: water; trifluoroacetic acid / 24 h / 110 °C View Scheme