1: 100 percent / hydrogen / Lindlar's catalyst / hexane / 3 h / 25 °C 2: 72 percent / N,N-dimethyl-aniline / 1 h / 195 °C View Scheme

1: 71 percent / potassium carbonate; potassium iodide; copper (I) iodide / dimethylformamide / 2 h / 25 - 65 °C 2: 100 percent / hydrogen / Lindlar's catalyst / hexane / 3 h / 25 °C 3: 72 percent / N,N-dimethyl-aniline / 1 h / 195 °C View Scheme

potassium hydroxide in 1,4-dioxane; methanol

1: With polystyrene-based selenenyl bromide resin in dichloromethane T=0 - 25°C; 0.333333 h; 2: With dihydrogen peroxide in tetrahydrofuran T=25°C; 0.333333 h; Further stages.;

pyridine; palladium (II) trifluoroacetate; oxygen; sodium carbonate in toluene T=80°C; 16 h; Molecular sieve;