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

Multi-step reaction with 3 steps 1: lithium aluminium tetrahydride / tetrahydrofuran2: triethylamine / dichloromethane3: sodium periodate; potassium permanganate / water; acetone  

Multi-step reaction with 2 steps 1: oxalyl dichloride / dichloromethane; N,N-dimethyl-formamide2: tin(IV) chloride / dichloromethane