1: 94 percent / ethyl chloroformate / CHCl3 / 0.25 h / 0 °C 2: 88 percent / dimethylformamide / 4 h 3: concd H2SO4, H2 / PtO2 / ethanol / 12 h / 2585.7 Torr 4: benzene / 3 h / Heating 5: 93 percent / LiAlH4 / tetrahydrofuran / 5 h / Heating View Scheme

1: 94 percent / ethyl chloroformate / CHCl3 / 0.25 h / 0 °C 2: 88 percent / dimethylformamide / 4 h 3: concd H2SO4, H2 / PtO2 / ethanol / 12 h / 2585.7 Torr 4: benzene / 3 h / Heating 5: 93 percent / LiAlH4 / tetrahydrofuran / 5 h / Heating 6: 10 percent Spectr. / MnO2 / CH2Cl2 / 40 h / 23 °C View Scheme

1: 94 percent / ethyl chloroformate / CHCl3 / 0.25 h / 0 °C 2: 88 percent / dimethylformamide / 4 h 3: concd H2SO4, H2 / PtO2 / ethanol / 12 h / 2585.7 Torr 4: benzene / 3 h / Heating View Scheme