1: SnCl2*2H2O, concd. HCl / ethanol / Heating 2: toluene / 6 h / Heating 3: diphenyl ether / 0.13 h / 255 - 256 °C 4: 20percent aq. NaOH / 0.5 h / Heating View Scheme

1: toluene / 6 h / Heating 2: diphenyl ether / 0.13 h / 255 - 256 °C 3: 20percent aq. NaOH / 0.5 h / Heating View Scheme

1: 1.) sodium / 1.) ethanol, RT, 0.5 h, 2.) ethanol, reflux, 21 h 2: SnCl2*2H2O, concd. HCl / ethanol / Heating 3: toluene / 6 h / Heating 4: diphenyl ether / 0.13 h / 255 - 256 °C 5: 20percent aq. NaOH / 0.5 h / Heating View Scheme

1: base 2: 1.) sodium / 1.) ethanol, RT, 0.5 h, 2.) ethanol, reflux, 21 h 3: SnCl2*2H2O, concd. HCl / ethanol / Heating 4: toluene / 6 h / Heating 5: diphenyl ether / 0.13 h / 255 - 256 °C 6: 20percent aq. NaOH / 0.5 h / Heating View Scheme

sodium hydroxide 0.5 h; Heating;