1: 91 percent / Zn; AcOH / methanol 2: 93 percent / NaHCO3 / diphenyl ether / 0.5 h / Heating 3: 100 percent / MeOH; HCl View Scheme

1: 79 percent / Zn, AcOH / ethanol 2: 86 percent / NaHCO3 / diphenyl ether / 0.5 h / 260 °C 3: Et3N, DMAP / CH2Cl2 / 0 °C 4: Bu3SnH, AIBN / benzene / 80 °C 5: 30percent H2O2, KHCO3 / methanol; tetrahydrofuran / Heating 6: 100 percent / imidazole / dimethylformamide 7: iPrEtN, DMAP / CH2Cl2 8: TBAF / tetrahydrofuran 9: SO3*Py, Et3N / dimethylsulfoxide 10: NaClO2, NaH2PO4*2H2O, 2-methyl-2-butene / 2-methyl-propan-2-ol; H2O 11: CH2Cl2 12: 98 percent / AcCl / methanol View Scheme

1: 91 percent / Zn; AcOH / methanol 2: 93 percent / NaHCO3 / diphenyl ether / 0.5 h / Heating View Scheme

1: 79 percent / Zn, AcOH / ethanol 2: 86 percent / NaHCO3 / diphenyl ether / 0.5 h / 260 °C 3: Et3N, DMAP / CH2Cl2 / 0 °C 4: Bu3SnH, AIBN / benzene / 80 °C 5: 30percent H2O2, KHCO3 / methanol; tetrahydrofuran / Heating 6: 100 percent / imidazole / dimethylformamide 7: iPrEtN, DMAP / CH2Cl2 8: TBAF / tetrahydrofuran 9: SO3*Py, Et3N / dimethylsulfoxide 10: NaClO2, NaH2PO4*2H2O, 2-methyl-2-butene / 2-methyl-propan-2-ol; H2O 11: CH2Cl2 12: 98 percent / AcCl / methanol 13: 96 percent / aq. 1 M NaOH / tetrahydrofuran; H2O View Scheme