Multi-step reaction with 8 steps 1: 83 percent / K2CO3 / acetone / 84 h / Heating2: 78 percent / p-toluenesulfonic acid monohydrate / benzene / 48 h / Heating3: 96 percent / sodium acetate, H2 / PtO2 / ethyl acetate / 24 h / 2585.7 Torr4: 57 percent / 2.) aq. NaOH / tetrahydrofuran / Ambient temperature; 1.) exothermic reaction, 2.)room temperature, 2 h;5: 85 percent / aq. HCl / acetone / 4 h / Ambient temperature6: 54 percent / NH3 / ethanol / 6 h / 130 °C7: 88 percent / tetrahydrofuran; diethyl ether / 1.) room temperature, 16 h, 2.) reflux, 2 h;8: 50 percent / KMnO4 / acetone / 96 h / Ambient temperature