1: 95 percent / tert-butyl hypochlorite / CH2Cl2 / 0.33 h / 0 °C 2: 54 percent / Ag2CO3, trifluoroacetic acid / 0.5 h / 0 °C View Scheme

Multi-step reaction with 2 steps 1: 95 percent / tert-butyl hypochlorite / CH2Cl2 / 0.33 h / 0 °C2: 13 percent / Ag2CO3, trifluoroacetic acid / 0.5 h / 0 °C  

With  tert-butylhypochlorite in  dichloromethane T=0°C; 0.333333 h;