1: 80 percent / azidotrimethylsilane; tetrabutylammonium fluoride / tetrahydrofuran / 3 h / 65 °C 2: 90 percent / hydrogen / Pd/C / methanol / 2.5 h View Scheme

sodium hydroxide; thiourea 1.) 95percent ethanol, reflux , 5h, 2.) water, reflux, 30 min; Yield given. Multistep reaction;