1.1: trifluoroacetic anhydride; dimethyl sulfoxide / dichloromethane / 1.5 h / -60 °C / |Inert atmosphere 1.2: 1 h / -60 - 20 °C / |Inert atmosphere 2.1: toluene / 1 h / |Photolysis; |Inert atmosphere View Scheme

lead(IV) acetate; acetic acid T=30 - 35°C; 2 h;