1: lithium diisopropylamide / THF 2: 71 percent / Pd(PPh3)4 / 1,2-dichloro-ethane / 4 h / 80 °C 3: 95 percent / TiCl4/H2O / acetic acid View Scheme

1: 99 percent / sodium metaperiodate / methanol; H2O / 16 h / 20 °C / in the dark 2: 95 percent / CCl4; CHCl3 / 240 h / 65 °C View Scheme

sodium periodate in methanol; water T=20°C; 16 h; in the dark;