1: 62 percent / LiHMDS, 3-phenyl-2-(phenylsulfonyl)oxaziridine / tetrahydrofuran / 1.) -78 deg C, 1 h, 2.) -78 deg C, 1 h 2: 86 percent / HCl, H2, H2O / 10 percent Pd/C / methanol; dioxane / 4 h / 25 °C 3: 85 percent / HCl, H2O / 3 h / Heating View Scheme