aluminium trichloride in carbon disulfide T=25°C; 4 h;

1: SOCl2 / 2 h / 50 °C 2: AlCl3 / CCl4; nitrobenzene View Scheme

1: 82 percent / Py*HCl / 10 h / 210 °C 2: 79 percent / tBuOK / dimethylformamide / 11 h / 115 °C 3: 1.) NaOH, 2.) HCl / 1.) EtOH, H2O, 25 deg C, 4 h, 2.) H2O, pH 3 4: 1.) NaBH4, NaOH, 2.) NaHCO3 / 1.) H2O, 50-55 deg C, 2.5 h, pH 8.3, 2.) 25 deg, 1 h. View Scheme

1: 82 percent / Py*HCl / 10 h / 210 °C 2: 79 percent / tBuOK / dimethylformamide / 11 h / 115 °C View Scheme

pyridine hydrochloride T=210°C; 10 h;