1: 88 percent / PPTS / methanol / 36 h / Ambient temperature 2: 96 percent / 2,6-lutidine / CH2Cl2 / -78 °C 3: 82 percent / CSA / methanol; CH2Cl2 / 5 h / 0 °C 4: 79 percent / PDC / dimethylformamide / 36 h / Ambient temperature 5: 80 percent / DCC, 4-DMAP / CH2Cl2 / 12 h / Ambient temperature 6: 94 percent / <RuCHPh>Cl2*(PCy3)2 / CH2Cl2 / 12 h / Ambient temperature 7: 65 percent / HF / acetonitrile; diethyl ether / 12 h / Ambient temperature 8: 48 percent / dimethyl dioxirane / CH2Cl2 / 2 h / -35 °C View Scheme