1.1: H2 / 5 percent Pd/C / ethanol / 20 °C 1.2: 99 percent / NaBH4 / ethanol 2.1: thionyl chloride / CH2Cl2 / 0.08 h / 20 °C 3.1: 1,8-DBU / benzene / Heating 4.1: 73 percent / AD-mix-β; CH3SO2NH2 / H2O; 2-methyl-propan-2-ol / 24 h / 0 °C 5.1: 3M HCl / H2O; methanol / 5 h / 60 °C View Scheme

1.1: H2 / 5 percent Pd/C / ethanol / 20 °C 1.2: 99 percent / NaBH4 / ethanol 2.1: thionyl chloride / CH2Cl2 / 0.08 h / 20 °C 3.1: 1,8-DBU / benzene / Heating 4.1: 73 percent / AD-mix-β; CH3SO2NH2 / H2O; 2-methyl-propan-2-ol / 24 h / 0 °C 5.1: 3M HCl / H2O; methanol / 5 h / 60 °C View Scheme

1.1: H2 / 5 percent Pd/C / ethanol / 20 °C 1.2: 99 percent / NaBH4 / ethanol 2.1: thionyl chloride / CH2Cl2 / 0.08 h / 20 °C 3.1: 1,8-DBU / benzene / Heating 4.1: 75 percent / AD-mix-α; CH3SO2NH2 / H2O; 2-methyl-propan-2-ol / 24 h / 0 °C 5.1: 3M HCl / H2O; methanol / 5 h / 60 °C View Scheme