1: 94 percent / Dess-Martin periodinane / CH2Cl2 / 1.5 h / 25 °C 2: 86 percent / [Mo(CHMe2Ph)(N-(2,6-(i-Pr)2C6H3))(OCMe(CF3)2)2] / benzene / 2 h / 55 °C 3: HF*pyridine / tetrahydrofuran / 1.5 h / 20 °C 4: 97 percent / 3,3-dimethyldioxirane / CH2Cl2; acetone / 2.5 h / -78 - -50 °C View Scheme

1: 94 percent / Dess-Martin periodinane / CH2Cl2 / 1.5 h / 25 °C 2: 86 percent / [Mo(CHMe2Ph)(N-(2,6-(i-Pr)2C6H3))(OCMe(CF3)2)2] / benzene / 2 h / 55 °C 3: HF*pyridine / tetrahydrofuran / 1.5 h / 20 °C View Scheme