1: 97 percent / pyridine, DMAP / CH2Cl2 / 0.5 h / Heating 2: 53 percent / Li/NH3 / tetrahydrofuran / 0.02 h / -33 °C 3: 1) H5IO6, MeNH2, 2) 4N HCl / 1) aq. MeOH, RT, 3h, 2) ether, 30 min View Scheme