1: aq. KOH 2: 82 percent / SOCl2 / benzene / 2 h / Heating 3: 64 percent / H2, quinolines S / Pd/BaSO4 / xylene / 4.5 h / 118 - 120 °C 4: 24 percent / ZnCl2, AcOH / 0.17 h / Heating View Scheme

1: aq. KOH 2: 82 percent / SOCl2 / benzene / 2 h / Heating 3: 64 percent / H2, quinolines S / Pd/BaSO4 / xylene / 4.5 h / 118 - 120 °C View Scheme

1: aq. KOH 2: 82 percent / SOCl2 / benzene / 2 h / Heating 3: 14 percent / H2, quinolines S / Pd/BaSO4 / xylene / 4.5 h / 118 - 120 °C View Scheme