sodium hypochlorite; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; sodium hydrogencarbonate; sodium bromide in dichloromethane T=0°C; 2 h;

1: 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; sodium hypochlorite; sodium bromide; sodium hydrogencarbonate / dichloromethane / 2 h / 0 °C 2: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; benzotriazol-1-ol; triethylamine / acetonitrile / 24 h / 0 - 20 °C 3: hydrogenchloride / water; methanol View Scheme

With  lithium borohydride in  tetrahydrofuran T=0 - 20°C; 2 h;