1: 1.) NaH / 1.) toluene, reflux, 30 min, 2.) toluene, reflux, 20 h 2: 92 percent / KOH / methanol; H2O / 72 h / Heating View Scheme

triphenylstannane in toluene T=120°C; 3.3 h;

potassium carbonate in water 20 h; Ambient temperature;

1: 66 percent / sodium hydroxide / H2O / 0.25 h 2: 1.) silver trifluoroacetate, 2.) NaHCO3 / 1.) ether, -15 deg C, 15 min, room temperature, 2.) methanol, water, room temperature 3: 60 percent / triphenyltin hydride / toluene / 3.3 h / 120 °C View Scheme