phosphorus pentachloride; dibenzoyl peroxide in tetrachloromethane Heating;

thionyl chloride in dichloromethane 1.5 h; Ambient temperaturefurther reagent acetyl chloride;

1: 52 percent / sodium hydride, sodium iodide / 1,2-dimethoxy-ethane / 6 h / Ambient temperature 2: 89 percent / m-chloroperbenzoic acid / CH2Cl2 / 0.17 h / 0 °C 3: 65 percent / thionyl chloride / CH2Cl2 / 1.5 h / Ambient temperature; further reagent acetyl chloride View Scheme

1: 89 percent / m-chloroperbenzoic acid / CH2Cl2 / 0.17 h / 0 °C 2: 65 percent / thionyl chloride / CH2Cl2 / 1.5 h / Ambient temperature; further reagent acetyl chloride View Scheme