1: 93 percent / iron / ethanol; acetic acid / 3.5 h / Heating 2: 60 percent / pyridine / 6 h / Ambient temperature 3: 36 percent / tetrakis(triphenylphosphine)palladium(0) / toluene / Heating 4: 58 percent / bis(acetonitrile)palladium chloride, p-benzoquinone, lithium chloride / dimethylformamide / 28 h / 100 - 110 °C 5: 83 percent / 20percent aq. NaOH / methanol / 12 h / Heating View Scheme

With  iron in  ethanol; acetic acid 3.5 h;  Heating;   

Multi-step reaction with 2 steps 1: 93 percent / iron / ethanol; acetic acid / 3.5 h / Heating2: 60 percent / pyridine / 6 h / Ambient temperature  

Multi-step reaction with 3 steps 1: 93 percent / iron / ethanol; acetic acid / 3.5 h / Heating2: 60 percent / pyridine / 6 h / Ambient temperature3: 36 percent / tetrakis(triphenylphosphine)palladium(0) / toluene / Heating  

Multi-step reaction with 4 steps 1: 93 percent / iron / ethanol; acetic acid / 3.5 h / Heating2: 60 percent / pyridine / 6 h / Ambient temperature3: 36 percent / tetrakis(triphenylphosphine)palladium(0) / toluene / Heating4: 58 percent / bis(acetonitrile)palladium chloride, p-benzoquinone, lithium chloride / dimethylformamide / 28 h / 100 - 110 °C