1: 95 percent / BaMnO4 / CH2Cl2 / 8 h / Ambient temperature 2: 100 percent / KCN/18-crown-6 complex / 2 h / 0 °C 3: 15 percent / 1 M LiN(SiMe3)2 / tetrahydrofuran / 0.33 h / 55 °C 4: 72 percent / LiAlH4, (S)-2-(2,6-xylidinomethyl)pyrrolidine / diethyl ether / 6 h / -72 °C View Scheme