hydrogenchloride; water T=60°C; 0.5 h; Inert atmosphere;

1.1: 6.4 g / NaBH3CN; HCl / methanol / 2 h / 20 °C / pH 4 2.1: Me3Al / CH2Cl2; hexane / 0.25 h / 20 °C 2.2: 66 percent / CH2Cl2; hexane / 20 h / 25 °C 3.1: 60 percent / H2SO4 / dimethylsulfoxide / 20 °C View Scheme