in diethyl ether 0.5 h;

1: Zn / diethyl ether; benzene 2: (i) POCl3, Py, (ii) H2, Pd-C, piperidine, EtOH 3: (i) O2, Py (irradiation), (ii) KHSO4 5: AlCl3 / toluene / Heating 6: diethyl ether / Ambient temperature View Scheme

1: AlCl3 / toluene / Heating 2: diethyl ether / Ambient temperature View Scheme

1: (i) O2, Py (irradiation), (ii) KHSO4 3: AlCl3 / toluene / Heating 4: diethyl ether / Ambient temperature View Scheme

1: (i) POCl3, Py, (ii) H2, Pd-C, piperidine, EtOH 2: (i) O2, Py (irradiation), (ii) KHSO4 4: AlCl3 / toluene / Heating 5: diethyl ether / Ambient temperature View Scheme