1: 0.75 h / 145 - 150 °C 2: hydrogen / Adams catalyst / methanol / 3 h / 3040 Torr 3: 3.1 g / 10 M hydrochloric acid / 10 h / Heating 4: 98percent sulfuric acid, sodium azide / CHCl3 / 20 °C View Scheme

1: 0.75 h / 145 - 150 °C 2: hydrogen / Adams catalyst / methanol / 3 h / 3040 Torr 3: 0.55 g / 10 M hydrochloric acid / 10 h / Heating View Scheme

1: 77 percent / NaN3 / ethanol; H2O / 8 h / Heating 2: NaBH4; [4(S)-Ph-oxazolidin-2-ylidene][4(S)-Ph-2-oxazolin-2-yl](CN)C / CoCl2*6H2O / ethanol; dimethylformamide / 24 h / 25 °C 3: aq. HCl / 16 h / 100 °C View Scheme