1: 51 percent / AlH3 / diethyl ether / 1.67 h / Ambient temperature 2: 70 percent / Et3N / butan-1-ol / 1.) 50 deg C, 2 h, 2.) reflux, 2 h 3: 0.5 M H2SO4 / methanol / 2 h / Ambient temperature 4: ammonia / methanol View Scheme

4-(N,N-dimethlyamino)pyridine; triethylamine in dichloromethane 6 h; Ambient temperature;