1: 85 percent / ruthenium dioxide hydrate, 10percent aqueous NaIO4 / ethyl acetate / 0.5 h / Ambient temperature 2: 94 percent / trifluoroacetic acid / CH2Cl2 / 1 h / Ambient temperature View Scheme

N-bromosuccinmide in chloroform T=20°C; 18 h;

With  ruthenium(IV) oxide; sodium periodate in  ethyl acetate 0.5 h;  Ambient temperature;