sodium hydroxide T=100°C; 1 h;

1.1: 75 percent / TsOH / benzene / Heating 2.1: Zn; NH4Cl / aq. ethanol / 3 h / 10 - 15 °C 2.2: 48 percent / aq. HCl / 24 h / 20 °C 3.1: 70 percent / aq. NaOH / 1 h / 100 °C View Scheme

1.1: Zn; NH4Cl / aq. ethanol / 3 h / 10 - 15 °C 1.2: 48 percent / aq. HCl / 24 h / 20 °C 2.1: 70 percent / aq. NaOH / 1 h / 100 °C View Scheme