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

1: 95 percent / K2CO3 / acetone / 48 h / Heating 2: 90 percent / KOH / ethanol / 2 h / Heating 3: thionyl chloride / 2 h / Heating View Scheme

1: 90 percent / KOH / ethanol / 2 h / Heating 2: thionyl chloride / 2 h / Heating View Scheme

thionyl chloride 2 h; Heating;