1: sodium periodate; potassium permanganate / water; acetone 2: oxalyl dichloride / dichloromethane; N,N-dimethyl-formamide 3: tin(IV) chloride / dichloromethane 4: 10 palladium on activated charcoal; sulfuric acid; hydrogen / ethanol 5: triethylamine / dichloromethane 6: N,N-dimethyl-formamide 7: hydrazine / ethanol 8: sodium hydroxide / tetrahydrofuran; water View Scheme