1: 67 percent / phenyliodine(III) bis(trifluoroacetate) / CH2Cl2 / 20 °C 2: 82 percent / Mo(CO)6 / acetonitrile; H2O / Heating 3: 70 percent / NaBH4; TFA / various solvent(s) / Heating 4: 60 percent / NMO; TPAP / acetonitrile / 1.5 h / 20 °C 5: 90 percent / 1,4-cyclohexadiene / Pd/C / ethanol / 2.5 h / 20 °C View Scheme