1: 79 percent / NaN3 / 15-crown-5 / tetrahydrofuran / 12 h / 20 °C 2: Jones' reagent / acetone / 0.25 h / 0 °C 3: H2 / Pd/C / ethanol / 16 h / 20 °C View Scheme

With  chlorine in  tetrachloromethane T=-15 - 20°C; 1 h;  opt. pur. of start. mat.: 45percent (S);