1: 1.) oxalyl chloride, dimethyl sulfoxide, 2.) triethylamine / 1.) CH2Cl2, -78 deg C, 2.) CH2Cl2, -78 deg C 2: 81 percent / hydrogen / PtO2 / dioxane / 20 h / 760 Torr / Ambient temperature 3: 1.) LiH2NBH3, 2.) Na2CO3 / 1.) THF, hexane, room temperature, 3 h, 2.) THF, hexane, water, CHCl3, room temperature, 1 h 4: 85 percent / molybdenum hexacarbonyl / acetonitrile; H2O / 3 h / Heating 5: 42 percent / triphenylphosphine, carbon tetrabromide / acetonitrile / 0.75 h / 70 °C 6: 96 percent / trifluoroacetic acid / CH2Cl2 / 3 h / Ambient temperature 7: 97 percent / CHCl3 / 72 h / Heating View Scheme