Stage #1: With  1-hydroxy-pyrrolidine-2,5-dione; dicyclohexyl-carbodiimide in  dichloromethane T=20°C; 12 h;  Inert atmosphere; Stage #2: With  sodium tetrahydroborate in  tetrahydrofuran; ethanol T=0°C;   

With  potassium permanganate; sodium periodate; sodium carbonate in  1,4-dioxane; water T=20°C; 0.75 h;