1: 75 percent / Bu4NBr / benzene / 4 h 2: 77 percent / p-toluenesulfonic acid / benzene / 6 h / Heating 3: 87 percent / H2 / 10percent Pd-C / methanol; ethyl acetate; acetic acid / 48 h / 2585.7 Torr 4: 95 percent / pyridinium chlorochromate, NaOAc, molecular sieves / CH2Cl2 / 2 h / Ambient temperature 5: 30 percent / TiCl3(DME)1.5, Zn-Cu couple / 1,2-dimethoxy-ethane / Heating View Scheme