2: aq. AcOH / tetrahydrofuran / 3 h / 20 °C 3: 94 percent / diisopropyl carbodiimide; DMAP / CH2Cl2 / 3 h / 20 °C 4: 73 percent / [Mo{N(tBu)(3,5-Me2C6H3}3] / CH2Cl2; toluene / 16 h / 80 °C 5: 86 percent / H2 / Lindlar catalyst; quinoline / hexane / 2 h / 20 °C / 760 Torr 6: 88 percent / aq. HF / acetonitrile / 1 h / 20 °C View Scheme