1: p-toluenesulfonic acid monohydrate / 0.67 h / Ambient temperature 2: 1.) 1.55M nBuLi / 1.) THF, hexane, -78 deg C, 5 min; -30 deg C, 5 min, 2.) THF, hexane, -78 deg C, 15 min; r.t., 20 min 3: p-toluenesulfonic acid monohydrate / methanol / 0.08 h / Heating 4: 99 percent / H2 / 5percent Pd/BaSO4 / pyridine; quinoline / 0.67 h / 750.06 Torr 5: 72 percent / diphenyldisulfide / cyclohexane / 1.83 h / Irradiation 6: 99 percent / 2N KOH / ethanol / 0.5 h / Heating View Scheme