1: 99 percent / DMAP; MsCl; NaN3 / CH2Cl2; dimethylsulfoxide / 2.5 h / 20 °C 2: 92 percent / H2 / 5 percent Pd/C / ethanol / 20 °C View Scheme

4-(N,N-dimethlyamino)pyridine; methanesulfonyl chloride in dichloromethane T=20°C; 3 h;