1: H2 / 5percent Pd/C / ethyl acetate / 760 Torr 2: 1.) aq. HBr, NaNO2, 2.) Cu2O / 1.) acetone, 5 deg C, 2.) acetone 3: NaOAc / ethanol / 4 h / Heating 4: 2N HCl / 20 h / Heating View Scheme