1: 1.) potassium iodate, aq. H2SO4, 2.) potassium iodide; / 1.) 90-100 deg C, 30 min, 2.) water, 1.5 h; 2: 79 percent / phosphorus oxychloride / 4 h / Heating 3: 53 percent / N,N-diisopropylethylamine, tri-o-tolylphosphine / palladium acetate / dimethylformamide / 1.) 100 deg C, 20 min, 2.) 116 deg C, 20 min; 4: 0.36 g / diisobutylaluminium hydride / CH2Cl2; toluene / 0.08 h / -65 °C 5: NaH / dimethylsulfoxide / 0.25 h View Scheme