1: 5 h / 70 °C 2: ammonium formate / palladium 10 on activated carbon / methanol / 8 h / 65 °C View Scheme

1: ammonium hydroxide / isopropyl alcohol; water; tetrahydrofuran / 24 h / 80 - 85 °C / autoclave 2: triethylamine / dichloromethane / 5 h / 5 - 20 °C View Scheme

sodium azide in N,N-dimethyl-formamide T=80 - 85°C; 4 h;