1: 93 percent / NMO; TPAP; 4 Angstroem molecular sieves / CH2Cl2 / 3.17 h / 20 °C 2: 99 percent / polystyrene-supported chlorite; polystyrene-supported dihydrogenphosphate; 2,3-dimethylbutene / 2-methyl-propan-2-ol; H2O; tetrahydrofuran / 6 h / 20 °C 3: 100 percent / TBAF / tetrahydrofuran / 4 h / 20 °C 4: Et3N / tetrahydrofuran / 0.83 h / 20 °C 5: polystyrene-supported DMAP / toluene / 2 h / 80 °C 6: 2.2 mg / polymer-supported TsOH / CH2Cl2 / 1 h / 20 °C View Scheme