potassium carbonate in N,N-dimethyl-formamide T=110 - 120°C; 8 h;

1: H2SO4 2: NaBH4 / Pd-C / H2O; dioxane 3: aq. HCl / dioxane / 2.5 h / Heating View Scheme

1: NaBH4 / Pd-C / H2O; dioxane 2: aq. HCl / dioxane / 2.5 h / Heating View Scheme

1: aq. NaHCO3 2: H2SO4 3: NaBH4 / Pd-C / H2O; dioxane 4: aq. HCl / dioxane / 2.5 h / Heating View Scheme

aluminum oxide 0.116667 h; microwave irradiation;

hydrogenchloride in 1,4-dioxane 2.5 h; Heating;

1: 65 percent / P2S5 / benzene / 4 h / Heating 2: 55 percent / 15percent NaOH, K3Fe(CN)6 / H2O; ethanol / 4 h / 80 - 90 °C 3: 52 percent / 47percent HBr / 24 h / Heating 4: 85 percent / tetrahydrofuran / 0.25 h / 0 - 5 °C 5: Ag2O / H2O / 0.75 h / 5 - 10 °C 6: 6 percent / phenothiazine / H2O; benzene / 1 h / Heating View Scheme

1: 85 percent / tetrahydrofuran / 0.25 h / 0 - 5 °C 2: Ag2O / H2O / 0.75 h / 5 - 10 °C 3: 6 percent / phenothiazine / H2O; benzene / 1 h / Heating View Scheme

1: 66 percent / benzene; pyridine / 3 h / Ambient temperature 2: 65 percent / P2S5 / benzene / 4 h / Heating 3: 55 percent / 15percent NaOH, K3Fe(CN)6 / H2O; ethanol / 4 h / 80 - 90 °C 4: 52 percent / 47percent HBr / 24 h / Heating 5: 85 percent / tetrahydrofuran / 0.25 h / 0 - 5 °C 6: Ag2O / H2O / 0.75 h / 5 - 10 °C 7: 6 percent / phenothiazine / H2O; benzene / 1 h / Heating View Scheme

1: 55 percent / 15percent NaOH, K3Fe(CN)6 / H2O; ethanol / 4 h / 80 - 90 °C 2: 52 percent / 47percent HBr / 24 h / Heating 3: 85 percent / tetrahydrofuran / 0.25 h / 0 - 5 °C 4: Ag2O / H2O / 0.75 h / 5 - 10 °C 5: 6 percent / phenothiazine / H2O; benzene / 1 h / Heating View Scheme