1: 1,8-diazabicyclo[5.4.0]undec-7-ene / N,N-dimethyl-formamide / 5 h / 20 °C 2: 5 palladium on charcoal; hydrogen / tetrahydrofuran / 3 h / 20 °C / 1500.15 - 2250.23 Torr / |Large scale 3: N-ethyl-N,N-diisopropylamine / tetrahydrofuran / 4 h / 20 °C / |Large scale 4: N-ethyl-N,N-diisopropylamine; hydrogen; palladium 10 on activated carbon / tetrahydrofuran; isopropyl alcohol / 5.5 h / 40 °C / 1861.76 Torr 5: hydrogenchloride; water / tetrahydrofuran; isopropyl alcohol / 17.5 h / 20 °C 6: hydrogen; palladium 10 on activated carbon / tetrahydrofuran / 7 h / 40 °C / 1861.76 Torr View Scheme