1.1: 98 percent / imidazole / dimethylformamide / 6 h / 20 °C 2.1: O3 / methanol / -78 °C 2.2: Me2S / methanol / 12 h / -78 - 20 °C 3.1: 1.01 g / H2 / Pd(OH)2/C / ethanol / 10 h / 20 °C 4.1: 90 percent / aq. K2CO3 / CH2Cl2 / 0.5 h / 20 °C 5.1: 93 percent / Dowex 50W-X8 / aq. methanol / 18 h / 20 °C 6.1: 99 percent / imidazole / CH2Cl2 / 1 h / 20 °C 7.1: 92 percent / Et3N / tetrahydrofuran / 0.33 h / 20 °C 8.1: 90 percent / tetrabutylammonium fluoride / tetrahydrofuran / 2 h / 20 °C 9.1: 65 percent / NaOAc; H2 / Pd/C / methanol / 6 h / 60 °C 10.1: 92 percent / Dowex 50W-X8; H2O / tetrahydrofuran / Heating View Scheme