1: 97 percent / LiAlH4 / tetrahydrofuran / 1.) 0 deg C, 14 h, 2.) room temp., 1 h 2: Et3N / tetrahydrofuran / 1.5 h / -25 °C 3: H2 / 20percent Pd(OH)2/C / ethanol / 0.33 h / 757.6 Torr 4: 93 percent / Bu4NCN / dimethylsulfoxide / 60 h / 60 - 65 °C View Scheme