1: triethylamine / dichloromethane 2: sodium periodate; potassium permanganate / water; acetone 3: oxalyl dichloride / dichloromethane; N,N-dimethyl-formamide 4: tin(IV) chloride / dichloromethane 5: 10 palladium on activated charcoal; sulfuric acid; hydrogen / ethanol 6: triethylamine / dichloromethane 7: N,N-dimethyl-formamide 8: hydrazine / ethanol 9: sodium hydroxide / tetrahydrofuran; water View Scheme