1: 75 percent / CHCl3 / 0.5 h / Ambient temperature 2: 49 percent / polyphosphoric acid / 1 h / 70 - 80 °C 3: 61 percent / lithium aluminum hydride / tetrahydrofuran / 20 h / Heating 4: 1.) 5percent Pd/C, 2.) 15percent aq. NaCl / 1.) glacial acetic acid, reflux, 20 h, 2.) water, ethanol View Scheme

1: 75 percent / CHCl3 / 0.5 h / Ambient temperature 2: 49 percent / polyphosphoric acid / 1 h / 70 - 80 °C 3: 61 percent / lithium aluminum hydride / tetrahydrofuran / 20 h / Heating 4: 1.) 5percent Pd/C, 2.) 15percent aq. NaCl / 1.) glacial acetic acid, reflux, 20 h, 2.) water, ethanol View Scheme

1: 49 percent / polyphosphoric acid / 1 h / 70 - 80 °C 2: 61 percent / lithium aluminum hydride / tetrahydrofuran / 20 h / Heating 3: 1.) 5percent Pd/C, 2.) 15percent aq. NaCl / 1.) glacial acetic acid, reflux, 20 h, 2.) water, ethanol View Scheme

1: 61 percent / lithium aluminum hydride / tetrahydrofuran / 20 h / Heating 2: 1.) 5percent Pd/C, 2.) 15percent aq. NaCl / 1.) glacial acetic acid, reflux, 20 h, 2.) water, ethanol View Scheme

palladium on activated charcoal; sodium chloride 1.) glacial acetic acid, reflux, 20 h, 2.) water, ethanol; Yield given. Multistep reaction;