1: NaBH3CN / methanol 2: 33 percent / camphorsulfonic acid / 1,2-dichloro-ethane / 1.) 2 d, 2.) reflux, 1 h 3: 91 percent / LiAlH4 / diethyl ether / 4 h / Ambient temperature 4: 2.) NH3 / 1.) MeOH, reflux, 4 d, 2.) MeOH, 15 min View Scheme