1: 1.) BF3*Et2O, 2.) NaBH4 / 1.) benzene, 0 deg C, 2.) THF 2: 66 percent / H2 / 10percent Pd-C / methanol 3: BF3-Et2O / 5 °C 4: 66 percent / (i-Pr)2NEt / CH2Cl2 5: 91 percent / 1M NaOH / methanol 6: 95 percent / MnO2 / CH2Cl2 7: 94 percent / NaOH / ethanol 8: 96 percent / 30percent H2O2, 5percent NaOH / methanol 9: 19 percent / conc. HCl / methanol / 70 °C View Scheme