1: 2,2-dimethyldioxirane / CH2Cl2; acetone / 0.17 h 2: K2CO3, 18-crown-6 / acetone / 8 h / Heating 3: 90 percent / NaH, tetrabutylammonium iodide / tetrahydrofuran / 6 h / Ambient temperature 4: 96 percent / TBAF / tetrahydrofuran / 4 h / Ambient temperature 5: 4-DMAP, EDCI / CH2Cl2 / 4 h / Ambient temperature 6: TsOH / methanol / 0.5 h / Ambient temperature 7: 100 percent / H2 / 10percent Pd/C / ethanol / 14 h / 760 Torr View Scheme