1: chlorotrimethylsilane / 4 h / 140 °C 2: Na / 1.) toluene, 15 min, 2.) reflux, 2 min; reflux to r.t., 90 min 3: 1 M aq. HCl / tetrahydrofuran / 8 h / Ambient temperature 4: 82 percent / PPh3, CCl4 / 1 h / Heating 5: 71 percent / LiAlH4 / tetrahydrofuran / Ambient temperature 6: Ti(O-i-Pr)4, molecular sieves 4-Angstroem, O2, tetraphenylporphine / CH2Cl2 / 6 h / -10 - -5 °C / Irradiation View Scheme

tetrachloromethane; triphenylphosphine 48 h; Ambient temperature;

calcium hydroxide powder; methyl iodide; dicobalt octacarbonyl in methanol; water T=20°C; 20 h;

1: (Ph)3P, CCl4 / 48 h / Ambient temperature 2: 55 percent / dimethylsulfoxide / 3 h / Ambient temperature View Scheme