1: K2CO3 / dimethylformamide / 1.) 3 h, 2.) 60 - 65 deg C, 3 h, 3.) RT, overnight 2: 0.17 h / 245 - 250 °C 3: m-chloroperbenzoic acid / CH2Cl2 / 24 h / 10 - 20 °C 4: Kieselgel 60 / CH2Cl2 / 24 h / Ambient temperature View Scheme

1: 0.17 h / 245 - 250 °C 2: m-chloroperbenzoic acid / CH2Cl2 / 24 h / 10 - 20 °C 3: Kieselgel 60 / CH2Cl2 / 24 h / Ambient temperature View Scheme

1: Jones' reagent / acetone / 48 h / Ambient temperature 2: thionyl chloride / benzene / 2.5 h / Heating 3: NH3 / dioxane / 2 h / Ambient temperature 4: P2O5 / toluene / 2 h / Heating 5: 1.) NaOCH3 / 1.) CH3OH, 2 h, 2.) CH3OH, 0 - 5 deg C, 0.25 h View Scheme