1: tetrahydrofuran / 0.5 h 2: 27 percent / ethanol / 1 h / Irradiation 3: 9 percent / KOH (40percent) / ethanol; dioxane / 2.5 h / Heating 4: 65 percent / potassium dichromate / dioxane; acetic acid / 5 h / Ambient temperature 5: 28 percent / MnO2, H2SO4 (conc.) / 0.5 h / 60 °C 6: silver oxide / dioxane / 1.5 h / Ambient temperature View Scheme

palladium on activated charcoal; hydrogen; acetic acid in ethanol

1: With palladium on activated charcoal; sodium acetate; acetic anhydride 2: With potassium carbonate in ethanol