1: 88 percent / aq. NaIO4 / diethyl ether / 2 h / Ambient temperature 2: 94 percent / silver carbonate on celite (Fetizon's reagent) / benzene / 8.5 h / Heating 3: 89 percent / 90percent trifluoroacetic acid / 0.25 h / Ambient temperature 4: 74.6 percent / H2 / Pb poisoned 5percent Pd/CaCO3 (Lindlar catalyst) / ethanol 5: 770 mg / conc. H2SO4 / 0.25 h / Ambient temperature 6: 1.21 g / acetic anhydride, acetic acid / Heating 7: 1.) CuI, LiI, TMSCl, 2.) n-Bu3SnH / 1.) THF, -60 deg C, 10 min, 2.) up to 0 deg C, 30 min View Scheme