1: 59 percent / toluene / 0.5 h / Heating 2: 96 percent / 12 M aq. HCl / CHCl3 / 24 h / 20 °C 3: 68 percent / air / 10percent Pd on C / diphenyl ether / 48 h / 240 °C View Scheme

 in  toluene 0.5 h;  Heating;