1: 85 percent / NaN3 / dimethylformamide / 12 h / 60 °C 2: 95 percent / CH2Cl2; pyridine / 6 h / 20 °C 3: 90 percent / H2 / 10 percent Pd-C / ethanol / 6 h / 2585.74 Torr View Scheme

sodium azide in N,N-dimethyl-formamide T=60°C; Substitution; 12 h;