1: lithium aluminium tetrahydride / diethyl ether / 1 h / 0 °C 2: pyridinium p-toluenesulfonate / dichloromethane / 8 h / Ambient temperature 3: hydrogen / palladium on carbon / ethanol 4: pyridine / 48 h / Ambient temperature 5: N,N,N',N',N'',N''-hexamethylphosphoric triamide; sodium hydride / 1.) DMF, RT, 24 h, 2.) DMF, 50 deg C, 7 d 6: hydrogenchloride / methanol / 12 h / Ambient temperature View Scheme