1: 93 percent / CCl4, PPh3 / acetonitrile / 2 h / Heating 2: 77 percent / Zn, AcOH / dimethylformamide / 2 h / 150 °C View Scheme

dipotassium peroxodisulfate; 1,10-phenanthroline; palladium diacetate in dimethyl sulfoxide; toluene T=120°C; 24 h; air; chemoselective reaction;