Multi-step reaction with 5 steps 1.1: 55 percent / LiCl / dimethylsulfoxide / 2 h / Heating2.1: H2 / Pd/C / ethanol / 18 h / 20 °C3.1: 0.42 g / pyridine / 18 h / 20 °C4.1: TMS-X4.2: 56 percent / SnCl4 / acetonitrile / 5 h / Heating5.1: tributyltin hydride; α,α'-azobisisobutyronitrile / dioxane / 16 h / Heating5.2: 31 percent / NH3 / methanol / 48 h / 20 °C  

Multi-step reaction with 3 steps 1: 94 percent / 1 N NaOH / ethanol; H2O / 3 h / 100 °C2: 36 percent / (diethylamino)sulfurtrifluoride / CH2Cl2; tetrahydrofuran / 2 h / Ambient temperature3: 59 percent / 80percent aq. CH3COOH / 15 h / 100 °C